Organisationsahrefsocannlcb9683 ()ubuntu-25.04-5.3_opam-2.4

ubuntu-25.04-5.3_opam-2.4

Logs

Show full logs
2025-08-09 22:09.46: New job: test ahrefs/ocannl https://github.com/ahrefs/ocannl.git#refs/heads/master (cb9683de2104dfd786d2d29c3c3698a459158e9e) (linux-x86_64:ubuntu-25.04-5.3_opam-2.4)
Base: ocaml/opam:ubuntu-25.04-ocaml-5.3@sha256:124a52160e4ea699e59a91d7f5e2e8443befd060c18b27eb6007f855adc30d93
Opam project build

To reproduce locally:

git clone --recursive "https://github.com/ahrefs/ocannl.git" -b "master" && cd "ocannl" && git reset --hard cb9683de
cat > Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:ubuntu-25.04-ocaml-5.3@sha256:124a52160e4ea699e59a91d7f5e2e8443befd060c18b27eb6007f855adc30d93
# ubuntu-25.04-5.3_opam-2.4
USER 1000:1000
ENV CLICOLOR_FORCE="1"
ENV OPAMCOLOR="always"
WORKDIR /src
RUN sudo ln -f /usr/bin/opam-2.4 /usr/bin/opam
RUN opam init --reinit -ni
RUN uname -rs && opam exec -- ocaml -version && opam --version
WORKDIR /src
RUN sudo chown opam /src
RUN cd ~/opam-repository && (git cat-file -e e77940d8ff8706305602d0d643bf01c77beef2e7 || git fetch origin master) && git reset -q --hard e77940d8ff8706305602d0d643bf01c77beef2e7 && git log --no-decorate -n1 --oneline && opam update -u
COPY --chown=1000:1000 neural_nets_lib.opam arrayjit.opam ./
RUN opam pin add -yn neural_nets_lib.dev './' && \
    opam pin add -yn arrayjit.dev './'
RUN echo '(lang dune 3.0)' > './dune-project'
ENV DEPS="angstrom.0.16.1 astring.0.8.5 backoff.0.1.1 base.v0.17.3 base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base bigarray-compat.1.1.0 bigstringaf.0.10.0 camlp-streams.5.0.1 camlzip.1.13 cmdliner.1.3.0 conf-libcurl.2 conf-libffi.2.0.0 conf-pkg-config.4 conf-zlib.1 cppo.1.8.0 csexp.1.5.2 csv.2.4 ctypes.0.23.0 ctypes-foreign.0.23.0 curl.0.10.0 dune.3.19.1 dune-configurator.3.19.1 dune-private-libs.3.19.1 dune-site.3.19.1 dyn.3.19.1 fieldslib.v0.17.0 fmt.0.11.0 integers.0.7.0 jane-street-headers.v0.17.0 jst-config.v0.17.0 logs.0.9.0 mdx.2.5.0 mtime.2.1.0 multicore-magic.2.3.1 num.1.6 ocaml.5.3.0 ocaml-base-compiler.5.3.0 ocaml-compiler.5.3.0 ocaml-compiler-libs.v0.17.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocaml-version.4.0.1 ocaml_intrinsics_kernel.v0.17.1 ocamlbuild.0.16.1 ocamlfind.1.9.8 ordering.3.19.1 parsexp.v0.17.0 pp.2.0.0 pprint.20230830 ppx_assert.v0.17.0 ppx_base.v0.17.0 ppx_cold.v0.17.0 ppx_compare.v0.17.0 ppx_derivers.1.2.1 ppx_deriving.6.1.1 ppx_enumerate.v0.17.0 ppx_expect.v0.17.3 ppx_fields_conv.v0.17.0 ppx_globalize.v0.17.2 ppx_hash.v0.17.0 ppx_here.v0.17.0 ppx_inline_test.v0.17.1 ppx_minidebug.2.3.0 ppx_optcomp.v0.17.1 ppx_sexp_conv.v0.17.1 ppx_string.v0.17.0 ppx_variants_conv.v0.17.1 ppxlib.0.36.0 ppxlib_jane.v0.17.4 printbox.0.12 printbox-ext-plot.0.12 printbox-html.0.12 printbox-md.0.12 printbox-text.0.12 ptime.1.2.0 re.1.13.2 result.1.5 saturn_lockfree.0.5.0 seq.base sexplib.v0.17.0 sexplib0.v0.17.0 stdio.v0.17.0 stdlib-shims.0.3.0 stdune.3.19.1 thread-local-storage.0.2 time_now.v0.17.0 topkg.1.1.0 tyxml.4.6.0 uucp.16.0.0 uutf.1.0.4 variantslib.v0.17.0"
ENV CI="true"
ENV OCAMLCI="true"
RUN opam update --depexts && opam install --cli=2.4 --depext-only -y neural_nets_lib.dev arrayjit.dev $DEPS
RUN opam install $DEPS
COPY --chown=1000:1000 . /src
RUN opam exec -- dune build @install @check @runtest && rm -rf _build

END-OF-DOCKERFILE
docker build .
END-REPRO-BLOCK

2025-08-09 22:09.46: Using cache hint "ahrefs/ocannl-ocaml/opam:ubuntu-25.04-ocaml-5.3@sha256:124a52160e4ea699e59a91d7f5e2e8443befd060c18b27eb6007f855adc30d93-ubuntu-25.04-5.3_opam-2.4-83f2c92a8149933d384aef7c4711fb31"
2025-08-09 22:09.46: Using OBuilder spec:
((from ocaml/opam:ubuntu-25.04-ocaml-5.3@sha256:124a52160e4ea699e59a91d7f5e2e8443befd060c18b27eb6007f855adc30d93)
 (comment ubuntu-25.04-5.3_opam-2.4)
 (user (uid 1000) (gid 1000))
 (env CLICOLOR_FORCE 1)
 (env OPAMCOLOR always)
 (workdir /src)
 (run (shell "sudo ln -f /usr/bin/opam-2.4 /usr/bin/opam"))
 (run (shell "opam init --reinit -ni"))
 (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
 (workdir /src)
 (run (shell "sudo chown opam /src"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "cd ~/opam-repository && (git cat-file -e e77940d8ff8706305602d0d643bf01c77beef2e7 || git fetch origin master) && git reset -q --hard e77940d8ff8706305602d0d643bf01c77beef2e7 && git log --no-decorate -n1 --oneline && opam update -u"))
 (copy (src neural_nets_lib.opam arrayjit.opam) (dst ./))
 (run (network host)
      (shell  "opam pin add -yn neural_nets_lib.dev './' && \
             \nopam pin add -yn arrayjit.dev './'"))
 (run (network host)
      (shell "echo '(lang dune 3.0)' > './dune-project'"))
 (env DEPS "angstrom.0.16.1 astring.0.8.5 backoff.0.1.1 base.v0.17.3 base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base bigarray-compat.1.1.0 bigstringaf.0.10.0 camlp-streams.5.0.1 camlzip.1.13 cmdliner.1.3.0 conf-libcurl.2 conf-libffi.2.0.0 conf-pkg-config.4 conf-zlib.1 cppo.1.8.0 csexp.1.5.2 csv.2.4 ctypes.0.23.0 ctypes-foreign.0.23.0 curl.0.10.0 dune.3.19.1 dune-configurator.3.19.1 dune-private-libs.3.19.1 dune-site.3.19.1 dyn.3.19.1 fieldslib.v0.17.0 fmt.0.11.0 integers.0.7.0 jane-street-headers.v0.17.0 jst-config.v0.17.0 logs.0.9.0 mdx.2.5.0 mtime.2.1.0 multicore-magic.2.3.1 num.1.6 ocaml.5.3.0 ocaml-base-compiler.5.3.0 ocaml-compiler.5.3.0 ocaml-compiler-libs.v0.17.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocaml-version.4.0.1 ocaml_intrinsics_kernel.v0.17.1 ocamlbuild.0.16.1 ocamlfind.1.9.8 ordering.3.19.1 parsexp.v0.17.0 pp.2.0.0 pprint.20230830 ppx_assert.v0.17.0 ppx_base.v0.17.0 ppx_cold.v0.17.0 ppx_compare.v0.17.0 ppx_derivers.1.2.1 ppx_deriving.6.1.1 ppx_enumerate.v0.17.0 ppx_expect.v0.17.3 ppx_fields_conv.v0.17.0 ppx_globalize.v0.17.2 ppx_hash.v0.17.0 ppx_here.v0.17.0 ppx_inline_test.v0.17.1 ppx_minidebug.2.3.0 ppx_optcomp.v0.17.1 ppx_sexp_conv.v0.17.1 ppx_string.v0.17.0 ppx_variants_conv.v0.17.1 ppxlib.0.36.0 ppxlib_jane.v0.17.4 printbox.0.12 printbox-ext-plot.0.12 printbox-html.0.12 printbox-md.0.12 printbox-text.0.12 ptime.1.2.0 re.1.13.2 result.1.5 saturn_lockfree.0.5.0 seq.base sexplib.v0.17.0 sexplib0.v0.17.0 stdio.v0.17.0 stdlib-shims.0.3.0 stdune.3.19.1 thread-local-storage.0.2 time_now.v0.17.0 topkg.1.1.0 tyxml.4.6.0 uucp.16.0.0 uutf.1.0.4 variantslib.v0.17.0")
 (env CI true)
 (env OCAMLCI true)
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "opam update --depexts && opam install --cli=2.4 --depext-only -y neural_nets_lib.dev arrayjit.dev $DEPS"))
 (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
      (network host)
      (shell "opam install $DEPS"))
 (copy (src .) (dst /src))
 (run (shell "opam exec -- dune build @install @check @runtest && rm -rf _build"))
)

2025-08-09 22:09.46: Waiting for resource in pool OCluster
2025-08-09 22:09.46: Waiting for worker…
2025-08-09 22:09.46: Got resource from pool OCluster
Building on toxis.caelum.ci.dev
HEAD is now at 0abd20bc New test moons_demo_mini; updates test expectations; unfortunately, bigram is nondeterministic; and moons_demo is broken on multicore_cc but probably an unlucky random seed because moons_demo_parallel works well
HEAD is now at cb9683de A good seed for moons_demo

(from ocaml/opam:ubuntu-25.04-ocaml-5.3@sha256:124a52160e4ea699e59a91d7f5e2e8443befd060c18b27eb6007f855adc30d93)
2025-08-09 22:09.47 ---> using "d30519b4acdd57742b165f681c15a599aecbfb24619a803ce0d60757b34b2167" from cache

/: (comment ubuntu-25.04-5.3_opam-2.4)

/: (user (uid 1000) (gid 1000))

/: (env CLICOLOR_FORCE 1)

/: (env OPAMCOLOR always)

/: (workdir /src)

/src: (run (shell "sudo ln -f /usr/bin/opam-2.4 /usr/bin/opam"))
2025-08-09 22:09.47 ---> using "f246f4986611cfad265009a42a8a72d8438f00b872c9afcda05da64805d1beae" from cache

/src: (run (shell "opam init --reinit -ni"))
Configuring from /home/opam/.opamrc and then from built-in defaults.
Checking for available remotes: rsync and local, git.
  - you won't be able to use mercurial repositories unless you install the hg command on your system.
  - you won't be able to use darcs repositories unless you install the darcs command on your system.

This version of opam requires an update to the layout of /home/opam/.opam from version 2.0 to version 2.2, which can't be reverted.
You may want to back it up before going further.

Continue? [Y/n] y
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-08-09 22:09.47 ---> using "1fbf02475475c348bd88f5d066d3fe619ade5b4a8db6c274116d5ef338e91925" from cache

/src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
Linux 5.15.0-134-generic
The OCaml toplevel, version 5.3.0
2.4.1
2025-08-09 22:09.47 ---> using "e907eaf9f29c835755a2fe7116a0f8cae47cfe00d485f386f422668b72dfcb60" from cache

/src: (workdir /src)

/src: (run (shell "sudo chown opam /src"))
2025-08-09 22:09.47 ---> using "03e37adb747b7c9a784a95a214bcb087341bc9513415faa991b59cd13889a2ce" from cache

/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
           (network host)
           (shell "cd ~/opam-repository && (git cat-file -e e77940d8ff8706305602d0d643bf01c77beef2e7 || git fetch origin master) && git reset -q --hard e77940d8ff8706305602d0d643bf01c77beef2e7 && git log --no-decorate -n1 --oneline && opam update -u"))
e77940d8ff Merge pull request #28255 from dbuenzli/b0-publish-fmt.0.11.0

<><> Updating package repositories ><><><><><><><><><><><><><><><><><><><><><><>
[default] synchronised from git+file:///home/opam/opam-repository

Already up-to-date.
Nothing to do.
# To update the current shell environment, run: eval $(opam env)
2025-08-09 22:09.47 ---> using "afe06332cd1057d133b790851c1984a10e017e5c6e3a6323f73c83eab4303fa1" from cache

/src: (copy (src neural_nets_lib.opam arrayjit.opam) (dst ./))
2025-08-09 22:09.47 ---> using "838fde09198ce83d9a24fd3e4c861454b32c85a7a055ce6c2e024745a28b9e24" from cache

/src: (run (network host)
           (shell  "opam pin add -yn neural_nets_lib.dev './' && \
                  \nopam pin add -yn arrayjit.dev './'"))
[neural_nets_lib.dev] synchronised (file:///src)
neural_nets_lib is now pinned to file:///src (version dev)
[arrayjit.dev] synchronised (file:///src)
arrayjit is now pinned to file:///src (version dev)
2025-08-09 22:09.47 ---> using "bc8f8c3f8527157191c9e37de4e408550ac336ed7d49b72a95c090368ddf3394" from cache

/src: (run (network host)
           (shell "echo '(lang dune 3.0)' > './dune-project'"))
2025-08-09 22:09.47 ---> using "a3ea90689f887b738b1f39f36dc632ab88d397eaecdbad468a0dae7af3f8486c" from cache

/src: (env DEPS "angstrom.0.16.1 astring.0.8.5 backoff.0.1.1 base.v0.17.3 base-bigarray.base base-bytes.base base-domains.base base-effects.base base-nnp.base base-threads.base base-unix.base bigarray-compat.1.1.0 bigstringaf.0.10.0 camlp-streams.5.0.1 camlzip.1.13 cmdliner.1.3.0 conf-libcurl.2 conf-libffi.2.0.0 conf-pkg-config.4 conf-zlib.1 cppo.1.8.0 csexp.1.5.2 csv.2.4 ctypes.0.23.0 ctypes-foreign.0.23.0 curl.0.10.0 dune.3.19.1 dune-configurator.3.19.1 dune-private-libs.3.19.1 dune-site.3.19.1 dyn.3.19.1 fieldslib.v0.17.0 fmt.0.11.0 integers.0.7.0 jane-street-headers.v0.17.0 jst-config.v0.17.0 logs.0.9.0 mdx.2.5.0 mtime.2.1.0 multicore-magic.2.3.1 num.1.6 ocaml.5.3.0 ocaml-base-compiler.5.3.0 ocaml-compiler.5.3.0 ocaml-compiler-libs.v0.17.0 ocaml-config.3 ocaml-options-vanilla.1 ocaml-syntax-shims.1.0.0 ocaml-version.4.0.1 ocaml_intrinsics_kernel.v0.17.1 ocamlbuild.0.16.1 ocamlfind.1.9.8 ordering.3.19.1 parsexp.v0.17.0 pp.2.0.0 pprint.20230830 ppx_assert.v0.17.0 ppx_base.v0.17.0 ppx_cold.v0.17.0 ppx_compare.v0.17.0 ppx_derivers.1.2.1 ppx_deriving.6.1.1 ppx_enumerate.v0.17.0 ppx_expect.v0.17.3 ppx_fields_conv.v0.17.0 ppx_globalize.v0.17.2 ppx_hash.v0.17.0 ppx_here.v0.17.0 ppx_inline_test.v0.17.1 ppx_minidebug.2.3.0 ppx_optcomp.v0.17.1 ppx_sexp_conv.v0.17.1 ppx_string.v0.17.0 ppx_variants_conv.v0.17.1 ppxlib.0.36.0 ppxlib_jane.v0.17.4 printbox.0.12 printbox-ext-plot.0.12 printbox-html.0.12 printbox-md.0.12 printbox-text.0.12 ptime.1.2.0 re.1.13.2 result.1.5 saturn_lockfree.0.5.0 seq.base sexplib.v0.17.0 sexplib0.v0.17.0 stdio.v0.17.0 stdlib-shims.0.3.0 stdune.3.19.1 thread-local-storage.0.2 time_now.v0.17.0 topkg.1.1.0 tyxml.4.6.0 uucp.16.0.0 uutf.1.0.4 variantslib.v0.17.0")

/src: (env CI true)

/src: (env OCAMLCI true)

/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
           (network host)
           (shell "opam update --depexts && opam install --cli=2.4 --depext-only -y neural_nets_lib.dev arrayjit.dev $DEPS"))
+ /usr/bin/sudo "apt-get" "update"
- Hit:1 http://archive.ubuntu.com/ubuntu plucky InRelease
- Get:2 http://archive.ubuntu.com/ubuntu plucky-updates InRelease [126 kB]
- Get:3 http://archive.ubuntu.com/ubuntu plucky-backports InRelease [126 kB]
- Get:4 http://archive.ubuntu.com/ubuntu plucky-updates/restricted amd64 Packages [181 kB]
- Get:5 http://archive.ubuntu.com/ubuntu plucky-updates/main amd64 Packages [334 kB]
- Get:6 http://archive.ubuntu.com/ubuntu plucky-updates/universe amd64 Packages [233 kB]
- Get:7 http://security.ubuntu.com/ubuntu plucky-security InRelease [126 kB]
- Get:8 http://security.ubuntu.com/ubuntu plucky-security/universe amd64 Packages [129 kB]
- Get:9 http://security.ubuntu.com/ubuntu plucky-security/main amd64 Packages [217 kB]
- Get:10 http://security.ubuntu.com/ubuntu plucky-security/restricted amd64 Packages [163 kB]
- Fetched 1636 kB in 1s (1992 kB/s)
- Reading package lists...
- 

<><> Synchronising pinned packages ><><><><><><><><><><><><><><><><><><><><><><>
[arrayjit.dev] synchronised (file:///src)
[neural_nets_lib.dev] synchronised (file:///src)

[NOTE] Package ocaml-options-vanilla is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 3).
[NOTE] Package ocaml-compiler is already installed (current version is 5.3.0).
[NOTE] Package ocaml-base-compiler is already installed (current version is 5.3.0).
[NOTE] Package ocaml is already installed (current version is 5.3.0).
[NOTE] Package base-unix is already installed (current version is base).
[NOTE] Package base-threads is already installed (current version is base).
[NOTE] Package base-nnp is already installed (current version is base).
[NOTE] Package base-effects is already installed (current version is base).
[NOTE] Package base-domains is already installed (current version is base).
[NOTE] Package base-bigarray is already installed (current version is base).

The following system packages will first need to be installed:
    libcurl4-gnutls-dev libffi-dev pkg-config zlib1g-dev

<><> Handling external dependencies <><><><><><><><><><><><><><><><><><><><><><>

+ /usr/bin/sudo "apt-get" "install" "-qq" "-yy" "libcurl4-gnutls-dev" "libffi-dev" "pkg-config" "zlib1g-dev"
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(Reading database ... 16533 files and directories currently installed.)
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- Unpacking libtasn1-6-dev:amd64 (4.20.0-2) ...
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- Preparing to unpack .../14-libgmpxx4ldbl_2%3a6.3.0+dfsg-3ubuntu1_amd64.deb ...
- Unpacking libgmpxx4ldbl:amd64 (2:6.3.0+dfsg-3ubuntu1) ...
- Selecting previously unselected package libgmp-dev:amd64.
- Preparing to unpack .../15-libgmp-dev_2%3a6.3.0+dfsg-3ubuntu1_amd64.deb ...
- Unpacking libgmp-dev:amd64 (2:6.3.0+dfsg-3ubuntu1) ...
- Selecting previously unselected package nettle-dev:amd64.
- Preparing to unpack .../16-nettle-dev_3.10.1-1_amd64.deb ...
- Unpacking nettle-dev:amd64 (3.10.1-1) ...
- Selecting previously unselected package libgnutls28-dev:amd64.
- Preparing to unpack .../17-libgnutls28-dev_3.8.9-2ubuntu3.1_amd64.deb ...
- Unpacking libgnutls28-dev:amd64 (3.8.9-2ubuntu3.1) ...
- Selecting previously unselected package libkrb5-dev:amd64.
- Preparing to unpack .../18-libkrb5-dev_1.21.3-4ubuntu2_amd64.deb ...
- Unpacking libkrb5-dev:amd64 (1.21.3-4ubuntu2) ...
- Selecting previously unselected package libldap-dev:amd64.
- Preparing to unpack .../19-libldap-dev_2.6.9+dfsg-2ubuntu1_amd64.deb ...
- Unpacking libldap-dev:amd64 (2.6.9+dfsg-2ubuntu1) ...
- Selecting previously unselected package libpkgconf3:amd64.
- Preparing to unpack .../20-libpkgconf3_1.8.1-4_amd64.deb ...
- Unpacking libpkgconf3:amd64 (1.8.1-4) ...
- Selecting previously unselected package pkgconf-bin.
- Preparing to unpack .../21-pkgconf-bin_1.8.1-4_amd64.deb ...
- Unpacking pkgconf-bin (1.8.1-4) ...
- Selecting previously unselected package pkgconf:amd64.
- Preparing to unpack .../22-pkgconf_1.8.1-4_amd64.deb ...
- Unpacking pkgconf:amd64 (1.8.1-4) ...
- Selecting previously unselected package libnghttp2-dev:amd64.
- Preparing to unpack .../23-libnghttp2-dev_1.64.0-1ubuntu1_amd64.deb ...
- Unpacking libnghttp2-dev:amd64 (1.64.0-1ubuntu1) ...
- Selecting previously unselected package libpsl-dev:amd64.
- Preparing to unpack .../24-libpsl-dev_0.21.2-1.1build1_amd64.deb ...
- Unpacking libpsl-dev:amd64 (0.21.2-1.1build1) ...
- Selecting previously unselected package zlib1g-dev:amd64.
- Preparing to unpack .../25-zlib1g-dev_1%3a1.3.dfsg+really1.3.1-1ubuntu1_amd64.deb ...
- Unpacking zlib1g-dev:amd64 (1:1.3.dfsg+really1.3.1-1ubuntu1) ...
- Selecting previously unselected package librtmp-dev:amd64.
- Preparing to unpack .../26-librtmp-dev_2.4+20151223.gitfa8646d.1-2build7_amd64.deb ...
- Unpacking librtmp-dev:amd64 (2.4+20151223.gitfa8646d.1-2build7) ...
- Selecting previously unselected package libssl-dev:amd64.
- Preparing to unpack .../27-libssl-dev_3.4.1-1ubuntu3_amd64.deb ...
- Unpacking libssl-dev:amd64 (3.4.1-1ubuntu3) ...
- Selecting previously unselected package libssh2-1-dev:amd64.
- Preparing to unpack .../28-libssh2-1-dev_1.11.1-1_amd64.deb ...
- Unpacking libssh2-1-dev:amd64 (1.11.1-1) ...
- Selecting previously unselected package libcurl4-gnutls-dev:amd64.
- Preparing to unpack .../29-libcurl4-gnutls-dev_8.12.1-3ubuntu1_amd64.deb ...
- Unpacking libcurl4-gnutls-dev:amd64 (8.12.1-3ubuntu1) ...
- Selecting previously unselected package pkg-config:amd64.
- Preparing to unpack .../30-pkg-config_1.8.1-4_amd64.deb ...
- Unpacking pkg-config:amd64 (1.8.1-4) ...
- Selecting previously unselected package libffi-dev:amd64.
- Preparing to unpack .../31-libffi-dev_3.4.7-1_amd64.deb ...
- Unpacking libffi-dev:amd64 (3.4.7-1) ...
- Selecting previously unselected package libtasn1-doc.
- Preparing to unpack .../32-libtasn1-doc_4.20.0-2_all.deb ...
- Unpacking libtasn1-doc (4.20.0-2) ...
- Setting up libgnutls-openssl27t64:amd64 (3.8.9-2ubuntu3.1) ...
- Setting up libtasn1-doc (4.20.0-2) ...
- Setting up libevent-2.1-7t64:amd64 (2.1.12-stable-10) ...
- Setting up libffi-dev:amd64 (3.4.7-1) ...
- Setting up libpsl-dev:amd64 (0.21.2-1.1build1) ...
- Setting up libunbound8:amd64 (1.22.0-1ubuntu1.1) ...
- Setting up libpkgconf3:amd64 (1.8.1-4) ...
- Setting up libgmpxx4ldbl:amd64 (2:6.3.0+dfsg-3ubuntu1) ...
- Setting up libgnutls-dane0t64:amd64 (3.8.9-2ubuntu3.1) ...
- Setting up libgssrpc4t64:amd64 (1.21.3-4ubuntu2) ...
- Setting up libldap-dev:amd64 (2.6.9+dfsg-2ubuntu1) ...
- Setting up comerr-dev:amd64 (2.1-1.47.2-1ubuntu1) ...
- Setting up libssl-dev:amd64 (3.4.1-1ubuntu3) ...
- Setting up pkgconf-bin (1.8.1-4) ...
- Setting up libidn2-dev:amd64 (2.3.8-2) ...
- Setting up zlib1g-dev:amd64 (1:1.3.dfsg+really1.3.1-1ubuntu1) ...
- Setting up libtasn1-6-dev:amd64 (4.20.0-2) ...
- Setting up libbrotli-dev:amd64 (1.1.0-2build4) ...
- Setting up libp11-kit-dev:amd64 (0.25.5-2ubuntu3) ...
- Setting up libkadm5clnt-mit12:amd64 (1.21.3-4ubuntu2) ...
- Setting up libgmp-dev:amd64 (2:6.3.0+dfsg-3ubuntu1) ...
- Setting up nettle-dev:amd64 (3.10.1-1) ...
- Setting up libkdb5-10t64:amd64 (1.21.3-4ubuntu2) ...
- Setting up pkgconf:amd64 (1.8.1-4) ...
- Setting up pkg-config:amd64 (1.8.1-4) ...
- Setting up libssh2-1-dev:amd64 (1.11.1-1) ...
- Setting up libkadm5srv-mit12:amd64 (1.21.3-4ubuntu2) ...
- Setting up krb5-multidev:amd64 (1.21.3-4ubuntu2) ...
- Setting up libgnutls28-dev:amd64 (3.8.9-2ubuntu3.1) ...
- Setting up libnghttp2-dev:amd64 (1.64.0-1ubuntu1) ...
- Setting up libkrb5-dev:amd64 (1.21.3-4ubuntu2) ...
- Setting up librtmp-dev:amd64 (2.4+20151223.gitfa8646d.1-2build7) ...
- Setting up libcurl4-gnutls-dev:amd64 (8.12.1-3ubuntu1) ...
- Processing triggers for libc-bin (2.41-6ubuntu1.1) ...
2025-08-09 22:09.47 ---> using "a48755ca9455402eda866262ec8042a0f02fb255a1a90e7e44dc3efe6555d38a" from cache

/src: (run (cache (opam-archives (target /home/opam/.opam/download-cache)))
           (network host)
           (shell "opam install $DEPS"))
[NOTE] Package ocaml-options-vanilla is already installed (current version is 1).
[NOTE] Package ocaml-config is already installed (current version is 3).
[NOTE] Package ocaml-compiler is already installed (current version is 5.3.0).
[NOTE] Package ocaml-base-compiler is already installed (current version is 5.3.0).
[NOTE] Package ocaml is already installed (current version is 5.3.0).
[NOTE] Package base-unix is already installed (current version is base).
[NOTE] Package base-threads is already installed (current version is base).
[NOTE] Package base-nnp is already installed (current version is base).
[NOTE] Package base-effects is already installed (current version is base).
[NOTE] Package base-domains is already installed (current version is base).
[NOTE] Package base-bigarray is already installed (current version is base).
The following actions will be performed:
=== install 87 packages
  - install angstrom                0.16.1
  - install astring                 0.8.5
  - install backoff                 0.1.1
  - install base                    v0.17.3
  - install base-bytes              base
  - install bigarray-compat         1.1.0
  - install bigstringaf             0.10.0
  - install camlp-streams           5.0.1
  - install camlzip                 1.13
  - install cmdliner                1.3.0
  - install conf-libcurl            2
  - install conf-libffi             2.0.0
  - install conf-pkg-config         4
  - install conf-zlib               1
  - install cppo                    1.8.0
  - install csexp                   1.5.2
  - install csv                     2.4
  - install ctypes                  0.23.0
  - install ctypes-foreign          0.23.0
  - install curl                    0.10.0
  - install dune                    3.19.1
  - install dune-configurator       3.19.1
  - install dune-private-libs       3.19.1
  - install dune-site               3.19.1
  - install dyn                     3.19.1
  - install fieldslib               v0.17.0
  - install fmt                     0.11.0
  - install integers                0.7.0
  - install jane-street-headers     v0.17.0
  - install jst-config              v0.17.0
  - install logs                    0.9.0
  - install mdx                     2.5.0
  - install mtime                   2.1.0
  - install multicore-magic         2.3.1
  - install num                     1.6
  - install ocaml-compiler-libs     v0.17.0
  - install ocaml-syntax-shims      1.0.0
  - install ocaml-version           4.0.1
  - install ocaml_intrinsics_kernel v0.17.1
  - install ocamlbuild              0.16.1
  - install ocamlfind               1.9.8
  - install ordering                3.19.1
  - install parsexp                 v0.17.0
  - install pp                      2.0.0
  - install pprint                  20230830
  - install ppx_assert              v0.17.0
  - install ppx_base                v0.17.0
  - install ppx_cold                v0.17.0
  - install ppx_compare             v0.17.0
  - install ppx_derivers            1.2.1
  - install ppx_deriving            6.1.1
  - install ppx_enumerate           v0.17.0
  - install ppx_expect              v0.17.3
  - install ppx_fields_conv         v0.17.0
  - install ppx_globalize           v0.17.2
  - install ppx_hash                v0.17.0
  - install ppx_here                v0.17.0
  - install ppx_inline_test         v0.17.1
  - install ppx_minidebug           2.3.0
  - install ppx_optcomp             v0.17.1
  - install ppx_sexp_conv           v0.17.1
  - install ppx_string              v0.17.0
  - install ppx_variants_conv       v0.17.1
  - install ppxlib                  0.36.0
  - install ppxlib_jane             v0.17.4
  - install printbox                0.12
  - install printbox-ext-plot       0.12
  - install printbox-html           0.12
  - install printbox-md             0.12
  - install printbox-text           0.12
  - install ptime                   1.2.0
  - install re                      1.13.2
  - install result                  1.5
  - install saturn_lockfree         0.5.0
  - install seq                     base
  - install sexplib                 v0.17.0
  - install sexplib0                v0.17.0
  - install stdio                   v0.17.0
  - install stdlib-shims            0.3.0
  - install stdune                  3.19.1
  - install thread-local-storage    0.2
  - install time_now                v0.17.0
  - install topkg                   1.1.0
  - install tyxml                   4.6.0
  - install uucp                    16.0.0
  - install uutf                    1.0.4
  - install variantslib             v0.17.0

<><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><>
-> retrieved angstrom.0.16.1  (cached)
-> retrieved astring.0.8.5  (cached)
-> retrieved backoff.0.1.1  (cached)
-> retrieved bigarray-compat.1.1.0  (cached)
-> retrieved bigstringaf.0.10.0  (cached)
-> retrieved base.v0.17.3  (cached)
-> retrieved camlp-streams.5.0.1  (cached)
-> retrieved camlzip.1.13  (cached)
-> retrieved cmdliner.1.3.0  (cached)
-> retrieved cppo.1.8.0  (cached)
-> installed conf-libcurl.2
-> installed conf-pkg-config.4
-> retrieved csexp.1.5.2  (cached)
-> retrieved csv.2.4  (cached)
-> retrieved ctypes.0.23.0, ctypes-foreign.0.23.0  (cached)
-> installed conf-libffi.2.0.0
-> installed conf-zlib.1
-> retrieved curl.0.10.0  (cached)
-> retrieved fieldslib.v0.17.0  (cached)
-> retrieved integers.0.7.0  (cached)
-> retrieved fmt.0.11.0  (cached)
-> retrieved jane-street-headers.v0.17.0  (cached)
-> retrieved jst-config.v0.17.0  (cached)
-> retrieved logs.0.9.0  (cached)
-> retrieved mtime.2.1.0  (cached)
-> retrieved multicore-magic.2.3.1  (cached)
-> retrieved mdx.2.5.0  (cached)
-> retrieved num.1.6  (cached)
-> retrieved ocaml-compiler-libs.v0.17.0  (cached)
-> retrieved ocaml-syntax-shims.1.0.0  (cached)
-> retrieved ocaml-version.4.0.1  (cached)
-> retrieved ocaml_intrinsics_kernel.v0.17.1  (cached)
-> retrieved ocamlbuild.0.16.1  (cached)
-> retrieved ocamlfind.1.9.8  (cached)
-> retrieved parsexp.v0.17.0  (cached)
-> retrieved pp.2.0.0  (cached)
-> retrieved dune.3.19.1, dune-configurator.3.19.1, dune-private-libs.3.19.1, dune-site.3.19.1, dyn.3.19.1, ordering.3.19.1, stdune.3.19.1  (cached)
-> retrieved pprint.20230830  (cached)
-> retrieved ppx_assert.v0.17.0  (cached)
-> retrieved ppx_base.v0.17.0  (cached)
-> retrieved ppx_cold.v0.17.0  (cached)
-> retrieved ppx_compare.v0.17.0  (cached)
-> retrieved ppx_derivers.1.2.1  (cached)
-> retrieved ppx_deriving.6.1.1  (cached)
-> retrieved ppx_enumerate.v0.17.0  (cached)
-> retrieved ppx_expect.v0.17.3  (cached)
-> retrieved ppx_fields_conv.v0.17.0  (cached)
-> retrieved ppx_globalize.v0.17.2  (cached)
-> retrieved ppx_hash.v0.17.0  (cached)
-> installed cmdliner.1.3.0
-> installed num.1.6
-> retrieved ppx_here.v0.17.0  (cached)
-> retrieved ppx_inline_test.v0.17.1  (cached)
-> retrieved ppx_minidebug.2.3.0  (cached)
-> retrieved ppx_optcomp.v0.17.1  (cached)
-> retrieved ppx_sexp_conv.v0.17.1  (cached)
-> retrieved ppx_string.v0.17.0  (cached)
-> retrieved ppx_variants_conv.v0.17.1  (cached)
-> retrieved ppxlib_jane.v0.17.4  (cached)
-> retrieved ptime.1.2.0  (cached)
-> retrieved re.1.13.2  (cached)
-> retrieved result.1.5  (cached)
-> retrieved saturn_lockfree.0.5.0  (cached)
-> retrieved seq.base  (cached)
-> installed seq.base
-> retrieved ppxlib.0.36.0  (cached)
-> retrieved sexplib.v0.17.0  (cached)
-> retrieved sexplib0.v0.17.0  (cached)
-> retrieved stdio.v0.17.0  (cached)
-> retrieved printbox.0.12, printbox-ext-plot.0.12, printbox-html.0.12, printbox-md.0.12, printbox-text.0.12  (cached)
-> retrieved stdlib-shims.0.3.0  (cached)
-> retrieved thread-local-storage.0.2  (cached)
-> retrieved time_now.v0.17.0  (cached)
-> retrieved topkg.1.1.0  (cached)
-> retrieved tyxml.4.6.0  (cached)
-> retrieved uutf.1.0.4  (cached)
-> retrieved variantslib.v0.17.0  (cached)
-> retrieved uucp.16.0.0  (cached)
-> installed ocamlfind.1.9.8
-> installed base-bytes.base
-> installed camlzip.1.13
-> installed ocamlbuild.0.16.1
-> installed topkg.1.1.0
-> installed uutf.1.0.4
-> installed mtime.2.1.0
-> installed fmt.0.11.0
-> installed ptime.1.2.0
-> installed astring.0.8.5
-> installed logs.0.9.0
-> installed dune.3.19.1
-> installed backoff.0.1.1
-> installed bigarray-compat.1.1.0
-> installed camlp-streams.5.0.1
-> installed csexp.1.5.2
-> installed cppo.1.8.0
-> installed csv.2.4
-> installed jane-street-headers.v0.17.0
-> installed multicore-magic.2.3.1
-> installed ocaml-compiler-libs.v0.17.0
-> installed ocaml-syntax-shims.1.0.0
-> installed ocaml-version.4.0.1
-> installed ocaml_intrinsics_kernel.v0.17.1
-> installed pp.2.0.0
-> installed pprint.20230830
-> installed ppx_derivers.1.2.1
-> installed printbox.0.12
-> installed re.1.13.2
-> installed result.1.5
-> installed sexplib0.v0.17.0
-> installed stdlib-shims.0.3.0
-> installed thread-local-storage.0.2
-> installed saturn_lockfree.0.5.0
-> installed integers.0.7.0
-> installed ordering.3.19.1
-> installed parsexp.v0.17.0
-> installed dune-configurator.3.19.1
-> installed mdx.2.5.0
-> installed bigstringaf.0.10.0
-> installed sexplib.v0.17.0
-> installed dyn.3.19.1
-> installed tyxml.4.6.0
-> installed angstrom.0.16.1
-> installed printbox-html.0.12
-> installed curl.0.10.0
-> installed stdune.3.19.1
-> installed ctypes.0.23.0
-> installed base.v0.17.3
-> installed fieldslib.v0.17.0
-> installed variantslib.v0.17.0
-> installed stdio.v0.17.0
-> installed dune-private-libs.3.19.1
-> installed ctypes-foreign.0.23.0
-> installed dune-site.3.19.1
-> installed uucp.16.0.0
-> installed printbox-text.0.12
-> installed printbox-md.0.12
-> installed printbox-ext-plot.0.12
-> installed ppxlib.0.36.0
-> installed ppxlib_jane.v0.17.4
-> installed ppx_optcomp.v0.17.1
-> installed ppx_cold.v0.17.0
-> installed ppx_here.v0.17.0
-> installed ppx_variants_conv.v0.17.1
-> installed ppx_fields_conv.v0.17.0
-> installed ppx_enumerate.v0.17.0
-> installed ppx_globalize.v0.17.2
-> installed ppx_deriving.6.1.1
-> installed ppx_compare.v0.17.0
-> installed ppx_sexp_conv.v0.17.1
-> installed ppx_hash.v0.17.0
-> installed ppx_assert.v0.17.0
-> installed ppx_minidebug.2.3.0
-> installed ppx_base.v0.17.0
-> installed jst-config.v0.17.0
-> installed ppx_string.v0.17.0
-> installed time_now.v0.17.0
-> installed ppx_inline_test.v0.17.1
-> installed ppx_expect.v0.17.3
Done.
# To update the current shell environment, run: eval $(opam env)
2025-08-09 22:09.47 ---> using "9cabe73ba1815ed6255817e6c9bbc19afaf54166a2154d4e34694ab944baf460" from cache

/src: (copy (src .) (dst /src))
2025-08-09 22:09.47 ---> saved as "391fa1d6b6e48f9f8ce8e39a9a3fc9a5846d7b2b630336459ff871ecbb8aa94a"

/src: (run (shell "opam exec -- dune build @install @check @runtest && rm -rf _build"))
File "arrayjit/test/dune", line 6, characters 16-24:
6 |   (pps ppx_here ppx_jane)))
                    ^^^^^^^^
Error: Library "ppx_jane" not found.
-> required by
   _build/default/arrayjit/test/.merlin-conf/exe-test_numerical_types
-> required by alias arrayjit/test/check
(cd _build/default/test/operations/config && ../../../arrayjit/bin/read_config.exe --read=backend)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
Wrote value of 'backend' to ocannl_backend.txt
(cd _build/default/test/operations && ./threefry4x32_demo.exe --ocannl_output_prec_in_ll_files=true --ocannl_output_debug_files_in_build_directory=true --ocannl_clean_up_artifacts_on_startup=true)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
Generated 48 uniform random numbers:
  [0]: 0.831543
  [1]: 0.237549
  [2]: 0.951172
  [3]: 0.120911
  [4]: 0.862793
  [5]: 0.485352
  [6]: 0.674316
  [7]: 0.235840
  [8]: 0.940918
  [9]: 0.007248
  [10]: 0.228271
  [11]: 0.902832
  [12]: 0.403564
  [13]: 0.635254
  [14]: 0.440674
  [15]: 0.443604
  [16]: 0.985352
  [17]: 0.635254
  [18]: 0.252686
  [19]: 0.655762
  [20]: 0.506836
  [21]: 0.048828
  [22]: 0.914551
  [23]: 0.854004
  [24]: 0.942871
  [25]: 0.836426
  [26]: 0.276855
  [27]: 0.749023
  [28]: 0.879883
  [29]: 0.045044
  [30]: 0.203247
  [31]: 0.380127
  [32]: 0.145630
  [33]: 0.250000
  [34]: 0.541016
  [35]: 0.626953
  [36]: 0.852051
  [37]: 0.109009
  [38]: 0.480713
  [39]: 0.904785
  [40]: 0.415039
  [41]: 0.346924
  [42]: 0.269287
  [43]: 0.016891
  [44]: 0.469238
  [45]: 0.454346
  [46]: 0.672852
  [47]: 0.538086
(cd _build/default/test/operations && ./top_down_prec.exe) > _build/default/test/operations/top_down_prec.exe.output
Failed to delete directory log_files: (Sys_error "log_files/micrograd_demo_logging.log: No such file or directory")
(cd _build/default/test/operations && ./test_threefry_precision.exe)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
Threefry4x32 result precision: uint4x32
Uniform result precision: single
Retrieving commandline, environment, or config file variable ocannl_backend
Found multicore_cc, in the config file
Retrieving commandline, environment, or config file variable ocannl_cd_ident_style
Not found, using default heuristic
Retrieving commandline, environment, or config file variable ocannl_ll_ident_style
Not found, using default heuristic
Retrieving commandline, environment, or config file variable ocannl_output_prec_in_ll_files
Not found, using default false
Retrieving commandline, environment, or config file variable ocannl_prefer_backend_uniformity
Found true, in the config file
Retrieving commandline, environment, or config file variable ocannl_debug_log_to_stream_files
Not found, using default false
Retrieving commandline, environment, or config file variable ocannl_cc_backend_optimization_level
Not found, using default 3
Retrieving commandline, environment, or config file variable ocannl_cc_backend_compiler_command
Not found, using default gcc
Retrieving commandline, environment, or config file variable ocannl_cc_backend_verify_codesign
Not found, using default false
Compilation successful!
Actual tensor precision in context: uint4x32
(cd _build/default/test/operations && ./top_down_prec.exe --ocannl_output_prec_in_ll_files=true --ocannl_output_debug_files_in_build_directory=true --ocannl_clean_up_artifacts_on_startup=false)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
                      #8 *._d
                       8.00
                      #9 grad_*._d Virt/30
                      <void>
             #6 + Virt/152                 │#4 c non-emb
             <void>                        │ 2.00
             #7 grad_+ Virt/30             │#5 grad_c Local/26030
             <void>                        │<void>
#0 a non-emb         │#2 b non-emb         │
 2.00                │ 2.00                │
#1 grad_a Local/26030│#3 grad_b Local/26030│
<void>               │<void>               │
File "test/operations/dune", lines 76-91, characters 0-458:
76 | (rule
77 |  (alias runtest)
78 |  (target
....
89 |     "--ocannl_output_prec_in_ll_files=true"
90 |     "--ocannl_output_debug_files_in_build_directory=true"
91 |     "--ocannl_clean_up_artifacts_on_startup=false"))))
Error: This rule defines a directory target "test/operations/build_files"
that matches the requested path
"test/operations/build_files/n3_fwd-unoptimized.ll" but the rule's action
didn't produce it
-> required by
   _build/default/test/operations/n3_fwd_with_prec-unoptimized.ll.actual
-> required by alias test/operations/runtest in test/operations/dune:101
(cd _build/default/test/ppx && ./test_ppx_op.exe)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/default/test/ppx && ./test_ppx_op_expected.exe)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/.sandbox/51f25bb9cbc27130c1b450298f6a55b1/default/test/einsum && .einsum_tutorials.inline-tests/inline-test-runner.exe inline-test-runner einsum_tutorials -partition 'Retrieving commandline, environment, or config file variable ocannl_log_level' -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/.sandbox/51f25bb9cbc27130c1b450298f6a55b1/default/test/einsum && .einsum_tutorials.inline-tests/inline-test-runner.exe inline-test-runner einsum_tutorials -partition 'Found 0, in the config file' -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations && .operations_tutorials.inline-tests/inline-test-runner.exe inline-test-runner operations_tutorials -partition 'Retrieving commandline, environment, or config file variable ocannl_log_level' -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations && .operations_tutorials.inline-tests/inline-test-runner.exe inline-test-runner operations_tutorials -partition 'Found 0, in the config file' -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations && .operations_tutorials.inline-tests/inline-test-runner.exe inline-test-runner operations_tutorials -partition test_threefry4x32.ml -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/default/test/operations && ./micrograd_demo_logging.exe --ocannl_debug_backend=text --ocannl_log_file_stem=micrograd_demo_logging --ocannl_log_main_domain_to_stdout=false --ocannl_debug_log_to_stream_files=true)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
Retrieving commandline, environment, or config file variable ocannl_backend
Found multicore_cc, in the config file
Retrieving commandline, environment, or config file variable ocannl_never_capture_stdout
Not found, using default false
Retrieving commandline, environment, or config file variable ocannl_cd_ident_style
Not found, using default heuristic
Retrieving commandline, environment, or config file variable ocannl_ll_ident_style
Not found, using default heuristic
Retrieving commandline, environment, or config file variable ocannl_output_prec_in_ll_files
Not found, using default false
Retrieving commandline, environment, or config file variable ocannl_prefer_backend_uniformity
Found true, in the config file
Retrieving commandline, environment, or config file variable ocannl_debug_log_to_stream_files
Found true, commandline --ocannl_debug_log_to_stream_files=true
Retrieving commandline, environment, or config file variable ocannl_cc_backend_optimization_level
Not found, using default 3
Retrieving commandline, environment, or config file variable ocannl_cc_backend_compiler_command
Not found, using default gcc
Retrieving commandline, environment, or config file variable ocannl_cc_backend_verify_codesign
Not found, using default false
HERE: test/operations/micrograd_demo_logging.ml:31:21
┌────────────────────┐
│[75]: +_g shape 0:1 │
│┌┬─────────┐        │
│││axis 0   │        │
│├┼─────────┤        │
│││ 2.47e+1 │        │
│└┴─────────┘        │
└────────────────────┘
HERE: test/operations/micrograd_demo_logging.ml:32:21
┌─────────────────┐
│[0]: a shape 0:1 │
│┌┬───────┐       │
│││axis 0 │       │
│├┼───────┤       │
│││ -4.00 │       │
│└┴───────┘       │
└─────────────────┘
┌────────────────────────┐
│[0]: a shape 0:1  grad_a│
│┌┬─────────┐            │
│││axis 0   │            │
│├┼─────────┤            │
│││ 1.38e+2 │            │
│└┴─────────┘            │
└────────────────────────┘
HERE: test/operations/micrograd_demo_logging.ml:33:21
┌─────────────────┐
│[2]: b shape 0:1 │
│┌┬──────┐        │
│││axis 0│        │
│├┼──────┤        │
│││ 2.00 │        │
│└┴──────┘        │
└─────────────────┘
┌────────────────────────┐
│[2]: b shape 0:1  grad_b│
│┌┬─────────┐            │
│││axis 0   │            │
│├┼─────────┤            │
│││ 6.45e+2 │            │
│└┴─────────┘            │
└────────────────────────┘
(cd _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations && .operations_tutorials.inline-tests/inline-test-runner.exe inline-test-runner operations_tutorials -partition zero2hero_1of7.ml -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
(cd _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations && .operations_tutorials.inline-tests/inline-test-runner.exe inline-test-runner operations_tutorials -partition primitive_ops.ml -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
File "test/einsum/einsum_trivia_exec.expected", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/einsum/einsum_trivia_exec.expected _build/default/test/einsum/einsum_trivia_exec.exe.output
diff --git a/_build/default/test/einsum/einsum_trivia_exec.expected b/_build/default/test/einsum/einsum_trivia_exec.exe.output
index 7b623db..7fd387d 100644
--- a/_build/default/test/einsum/einsum_trivia_exec.expected
+++ b/_build/default/test/einsum/einsum_trivia_exec.exe.output
@@ -657,159 +657,159 @@ HERE: test/einsum/einsum_trivia_exec.ml:229:21
 │└──────┴────────────────────────────────────┘│
 └─────────────────────────────────────────────┘
 HERE: test/einsum/einsum_trivia_exec.ml:254:21
-┌────────────────────────────────┐
-│[9]: ;=>+ shape 0:4,1:5,2:6,3:3 │
-│┌──────┬──────────────────┐     │
-││0 @ 0 │axis 3            │     │
-│├──────┼──────────────────┤     │
-││0 @ 1 │ 0.00  0.00  0.00 │     │
-││axis 2│ 0.00  0.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 0.00  0.00  4.00 │     │
-││      │ 0.00  0.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││1 @ 1 │ 0.00  1.00  0.00 │     │
-││axis 2│ 0.00  1.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 0.00  1.00  4.00 │     │
-││      │ 0.00  1.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││2 @ 1 │ 0.00  2.00  0.00 │     │
-││axis 2│ 0.00  2.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 0.00  2.00  4.00 │     │
-││      │ 0.00  2.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││3 @ 1 │ 0.00  3.00  0.00 │     │
-││axis 2│ 0.00  3.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 0.00  3.00  4.00 │     │
-││      │ 0.00  3.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││4 @ 1 │ 0.00  4.00  0.00 │     │
-││axis 2│ 0.00  4.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 0.00  4.00  4.00 │     │
-││      │ 0.00  4.00  5.00 │     │
-│└──────┴──────────────────┘     │
-├────────────────────────────────┤
-│┌──────┬──────────────────┐     │
-││1 @ 0 │axis 3            │     │
-│├──────┼──────────────────┤     │
-││0 @ 1 │ 1.00  0.00  0.00 │     │
-││axis 2│ 1.00  0.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 1.00  0.00  4.00 │     │
-││      │ 1.00  0.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││1 @ 1 │ 1.00  1.00  0.00 │     │
-││axis 2│ 1.00  1.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 1.00  1.00  4.00 │     │
-││      │ 1.00  1.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││2 @ 1 │ 1.00  2.00  0.00 │     │
-││axis 2│ 1.00  2.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 1.00  2.00  4.00 │     │
-││      │ 1.00  2.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││3 @ 1 │ 1.00  3.00  0.00 │     │
-││axis 2│ 1.00  3.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 1.00  3.00  4.00 │     │
-││      │ 1.00  3.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││4 @ 1 │ 1.00  4.00  0.00 │     │
-││axis 2│ 1.00  4.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 1.00  4.00  4.00 │     │
-││      │ 1.00  4.00  5.00 │     │
-│└──────┴──────────────────┘     │
-├────────────────────────────────┤
-│┌──────┬──────────────────┐     │
-││2 @ 0 │axis 3            │     │
-│├──────┼──────────────────┤     │
-││0 @ 1 │ 2.00  0.00  0.00 │     │
-││axis 2│ 2.00  0.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 2.00  0.00  4.00 │     │
-││      │ 2.00  0.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││1 @ 1 │ 2.00  1.00  0.00 │     │
-││axis 2│ 2.00  1.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 2.00  1.00  4.00 │     │
-││      │ 2.00  1.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││2 @ 1 │ 2.00  2.00  0.00 │     │
-││axis 2│ 2.00  2.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 2.00  2.00  4.00 │     │
-││      │ 2.00  2.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││3 @ 1 │ 2.00  3.00  0.00 │     │
-││axis 2│ 2.00  3.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 2.00  3.00  4.00 │     │
-││      │ 2.00  3.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││4 @ 1 │ 2.00  4.00  0.00 │     │
-││axis 2│ 2.00  4.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 2.00  4.00  4.00 │     │
-││      │ 2.00  4.00  5.00 │     │
-│└──────┴──────────────────┘     │
-├────────────────────────────────┤
-│┌──────┬──────────────────┐     │
-││3 @ 0 │axis 3            │     │
-│├──────┼──────────────────┤     │
-││0 @ 1 │ 3.00  0.00  0.00 │     │
-││axis 2│ 3.00  0.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 3.00  0.00  4.00 │     │
-││      │ 3.00  0.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││1 @ 1 │ 3.00  1.00  0.00 │     │
-││axis 2│ 3.00  1.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 3.00  1.00  4.00 │     │
-││      │ 3.00  1.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││2 @ 1 │ 3.00  2.00  0.00 │     │
-││axis 2│ 3.00  2.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 3.00  2.00  4.00 │     │
-││      │ 3.00  2.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││3 @ 1 │ 3.00  3.00  0.00 │     │
-││axis 2│ 3.00  3.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 3.00  3.00  4.00 │     │
-││      │ 3.00  3.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││4 @ 1 │ 3.00  4.00  0.00 │     │
-││axis 2│ 3.00  4.00  1.00 │     │
-││      │ ...   ...   ...  │     │
-││      │ 3.00  4.00  4.00 │     │
-││      │ 3.00  4.00  5.00 │     │
-│└──────┴──────────────────┘     │
-└────────────────────────────────┘
+┌────────────────────────────────────┐
+│[9]: ;=>+ shape 0:4,1:5,2:6,3:3     │
+│┌──────┬───────────────────────────┐│
+││0 @ 0 │axis 3                     ││
+│├──────┼───────────────────────────┤│
+││0 @ 1 │ -2.42e+16  3.06e-41  0.00 ││
+││axis 2│ 0.00       1.93e+3   1.00 ││
+││      │ ...        ...       ...  ││
+││      │ 2.82e+3    3.04e+3   4.00 ││
+││      │ 0.00       0.00      5.00 ││
+│├──────┼───────────────────────────┤│
+││1 @ 1 │ -2.42e+16  1.00     0.00  ││
+││axis 2│ 0.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 0.00       1.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││2 @ 1 │ -2.42e+16  2.00     0.00  ││
+││axis 2│ 0.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 0.00       2.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││3 @ 1 │ -2.42e+16  3.00     0.00  ││
+││axis 2│ 0.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 0.00       3.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││4 @ 1 │ -2.42e+16  4.00     0.00  ││
+││axis 2│ 0.00       1.94e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 0.00       4.00     5.00  ││
+│└──────┴───────────────────────────┘│
+├────────────────────────────────────┤
+│┌──────┬───────────────────────────┐│
+││1 @ 0 │axis 3                     ││
+│├──────┼───────────────────────────┤│
+││0 @ 1 │ -2.42e+16  3.06e-41  0.00 ││
+││axis 2│ 1.00       1.93e+3   1.00 ││
+││      │ ...        ...       ...  ││
+││      │ 2.82e+3    3.04e+3   4.00 ││
+││      │ 1.00       0.00      5.00 ││
+│├──────┼───────────────────────────┤│
+││1 @ 1 │ -2.42e+16  1.00     0.00  ││
+││axis 2│ 1.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 1.00       1.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││2 @ 1 │ -2.42e+16  2.00     0.00  ││
+││axis 2│ 1.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 1.00       2.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││3 @ 1 │ -2.42e+16  3.00     0.00  ││
+││axis 2│ 1.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 1.00       3.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││4 @ 1 │ -2.42e+16  4.00     0.00  ││
+││axis 2│ 1.00       1.94e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 1.00       4.00     5.00  ││
+│└──────┴───────────────────────────┘│
+├────────────────────────────────────┤
+│┌──────┬───────────────────────────┐│
+││2 @ 0 │axis 3                     ││
+│├──────┼───────────────────────────┤│
+││0 @ 1 │ -2.42e+16  3.06e-41  0.00 ││
+││axis 2│ 2.00       1.93e+3   1.00 ││
+││      │ ...        ...       ...  ││
+││      │ 2.82e+3    3.04e+3   4.00 ││
+││      │ 2.00       0.00      5.00 ││
+│├──────┼───────────────────────────┤│
+││1 @ 1 │ -2.42e+16  1.00     0.00  ││
+││axis 2│ 2.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 2.00       1.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││2 @ 1 │ -2.42e+16  2.00     0.00  ││
+││axis 2│ 2.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 2.00       2.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││3 @ 1 │ -2.42e+16  3.00     0.00  ││
+││axis 2│ 2.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 2.00       3.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││4 @ 1 │ -2.42e+16  4.00     0.00  ││
+││axis 2│ 2.00       1.94e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 2.00       4.00     5.00  ││
+│└──────┴───────────────────────────┘│
+├────────────────────────────────────┤
+│┌──────┬───────────────────────────┐│
+││3 @ 0 │axis 3                     ││
+│├──────┼───────────────────────────┤│
+││0 @ 1 │ -2.42e+16  3.06e-41  0.00 ││
+││axis 2│ 3.00       1.93e+3   1.00 ││
+││      │ ...        ...       ...  ││
+││      │ 2.82e+3    3.04e+3   4.00 ││
+││      │ 3.00       0.00      5.00 ││
+│├──────┼───────────────────────────┤│
+││1 @ 1 │ -2.42e+16  1.00     0.00  ││
+││axis 2│ 3.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 3.00       1.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││2 @ 1 │ -2.42e+16  2.00     0.00  ││
+││axis 2│ 3.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 3.00       2.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││3 @ 1 │ -2.42e+16  3.00     0.00  ││
+││axis 2│ 3.00       1.93e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 3.00       3.00     5.00  ││
+│├──────┼───────────────────────────┤│
+││4 @ 1 │ -2.42e+16  4.00     0.00  ││
+││axis 2│ 3.00       1.94e+3  1.00  ││
+││      │ ...        ...      ...   ││
+││      │ 2.82e+3    3.04e+3  4.00  ││
+││      │ 3.00       4.00     5.00  ││
+│└──────┴───────────────────────────┘│
+└────────────────────────────────────┘
 HERE: test/einsum/einsum_trivia_exec.ml:255:21
 [1]: =>_ti shape 0:4,1:3  <not-hosted>
 HERE: test/einsum/einsum_trivia_exec.ml:256:21
-┌───────────────────────────┐
-│[7]: =>_tk shape 0:6,1:3   │
-│┌──────┬──────────────────┐│
-││      │axis 1            ││
-│├──────┼──────────────────┤│
-││axis 0│ 0.00  0.00  0.00 ││
-││      │ 0.00  0.00  1.00 ││
-││      │ ...   ...   ...  ││
-││      │ 0.00  0.00  4.00 ││
-││      │ 0.00  0.00  5.00 ││
-│└──────┴──────────────────┘│
-└───────────────────────────┘
+┌────────────────────────────────────┐
+│[7]: =>_tk shape 0:6,1:3            │
+│┌──────┬───────────────────────────┐│
+││      │axis 1                     ││
+│├──────┼───────────────────────────┤│
+││axis 0│ -2.42e+16  3.06e-41  0.00 ││
+││      │ 0.00       1.93e+3   1.00 ││
+││      │ ...        ...       ...  ││
+││      │ 2.82e+3    3.04e+3   4.00 ││
+││      │ 0.00       0.00      5.00 ││
+│└──────┴───────────────────────────┘│
+└────────────────────────────────────┘
 HERE: test/einsum/einsum_trivia_exec.ml:278:21
 ┌─────────────────────────────────────────────────────────────────┐
 │[2]: ;=>_c shape 0:3|1:4,2:2                                     │
File "test/training/moons_demo_mini.expected", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/training/moons_demo_mini.expected _build/default/test/training/moons_demo_mini.exe.output
diff --git a/_build/default/test/training/moons_demo_mini.expected b/_build/default/test/training/moons_demo_mini.exe.output
index 8e540ca..0e777fc 100644
--- a/_build/default/test/training/moons_demo_mini.expected
+++ b/_build/default/test/training/moons_demo_mini.exe.output
@@ -4,18 +4,17 @@ Half-moons scatterplot and decision boundary:
 ┌─────────────────────────┐
 │********#****************│
 │***##########************│
-│**#############********..│
-│*###****%***####**.....%.│
-│###****%%****.##......%%%│
+│**#############******....│
+│*###****%***####.......%.│
+│###****%%*....##......%%%│
 │##*****%%%....###.....%%.│
 │##***...%%%....##....%%%.│
-│#***....%%%%...##...%%%..│
-│*........%%%%%%%%%%%%%...│
-│...........%%%%%%%%%%....│
+│#**.....%%%%...##...%%%..│
+│**.......%%%%%%%%%%%%%...│
+│*..........%%%%%%%%%%....│
 └─────────────────────────┘Loss:
 ┌─────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│ 2.68│-                                                                                                   │
-│     │                                                                                                    │
+│ 3.77│-                                                                                                   │
 │     │                                                                                                    │
 │     │                                                                                                    │
 │     │                                                                                                    │
@@ -32,73 +31,74 @@ Half-moons scatterplot and decision boundary:
 │     │                                                                                                    │
 │     │                                                                                                    │
 │     │                                                                                                    │
-│l    │                                                                                                    │
+│     │                                                                                                    │
+│l    │  -                                                                                                 │
 │o    │                                                                                                    │
 │s    │                                                                                                    │
-│s    │  -                                                                                                 │
+│s    │                                                                                                    │
 │     │                                                                                                    │
+│     │   -                                                                                                │
 │     │                                                                                                    │
 │     │                                                                                                    │
 │     │                                                                                                    │
+│     │     -                                                                                              │
 │     │                                                                                                    │
 │     │                                                                                                    │
-│     │   -                                                                                                │
-│     │     -                                                                                              │
 │     │                                                                                                    │
-│     │       -    -                                                                                       │
+│     │      -                                                                                             │
 │     │                                                                                                    │
-│     │      -         -                                                                                   │
-│     │               -    -                                                                               │
-│     │        -  -           -                                                                            │
-│     │          -       -   -            --                                                               │
-│     │             -                                                                                      │
-│     │                                 -             -     -                            -    -            │
-│ 0.00│                 -   -   ---- ---    -- ---- -- - ---  ---- ---- ---- ---- ---- -- - -- - ---- ---- │
+│     │                                                                                                    │
+│     │       --   -                                                                                       │
+│     │          -               -                                                                         │
+│     │           -   - -    -                                                                             │
+│     │             -       -              -                   -                                           │
+│     │                -   -  -                                                                            │
+│ 0.00│                  -      - -- ---- - -- ---- ---- ---- - -- ---- ---- ---- ---- ---- ---- ---- ---- │
 ├─────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
 │     │0.00                                                                                         7.90e+1│
 │     │                                                step                                                │
 └─────┴────────────────────────────────────────────────────────────────────────────────────────────────────┘Log-loss, for better visibility:
 ┌─────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│ 9.87e-1 │-                                                                                                   │
+│ 1.32    │-                                                                                                   │
 │         │                                                                                                    │
-│         │ -                                                                                                  │
-│         │  -                                                                                                 │
+│         │ --                                                                                                 │
+│         │   -                                                                                                │
+│         │     -                                                                                              │
 │         │                                                                                                    │
-│         │   - -                                                                                              │
-│         │       -    -                                                                                       │
-│         │      -        --   -                                                                               │
-│         │        -  -                                                                                        │
-│         │          -       -   --           --                                                               │
-│         │             -                                                                                      │
-│         │                                 -                                                                  │
-│         │                                               -     -                                 -            │
-│         │                                                                                  -                 │
-│         │                     -                                 -          -    -              -          -  │
-│         │                 -                       -      -                -         -                        │
-│l        │                                                                                            -       │
-│o        │                              -           -         -   -          -               -       -        │
-│g        │                                -                                                                   │
-│         │                                              -   -                                     -      -    │
-│l        │                                                                        -     -  -                  │
-│o        │                                                                                                    │
-│s        │                          -             -                     -                 -                   │
-│s        │                                             -                               -                      │
+│         │      -                                                                                             │
+│         │       --   -                                                                                       │
+│         │          -           -   -                                                                         │
+│         │           -   - -                                      -                                           │
+│         │             -       -              -                                                               │
 │         │                                                                                                    │
+│         │                -   -  -                                                                            │
+│         │                         -                                                                          │
+│         │                  -                      -                                                          │
+│         │                                                       -               -               -    -       │
+│l        │                                                                                  -                 │
+│o        │                           -       -    -            -                                  -  -   - -  │
+│g        │                                                - -                        -       -            -   │
+│         │                                          -                       -           -                     │
+│l        │                                              -                             -         -             │
+│o        │                                 -                                      -                           │
+│s        │                                                              -                  -                  │
+│s        │                                             - -                   -                                │
+│         │                              -                                                                     │
 │         │                                                                                                    │
-│         │                                                                                                -   │
+│         │                                                                      -         -                   │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
-│         │                                                                    -                               │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
+│         │                                                                 -                                  │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
-│ -1.00e+1│                         - --  -     --    -       -     -- -- -      -  -  -        -    -  -    - │
+│ -1.00e+1│                            -  --    --    -       --    -- -- -    -    -   -       -    -  -    - │
 ├─────────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
 │         │0.00                                                                                         7.90e+1│
 │         │                                                step                                                │
(cd _build/.sandbox/51f25bb9cbc27130c1b450298f6a55b1/default/test/einsum && .einsum_tutorials.inline-tests/inline-test-runner.exe inline-test-runner einsum_tutorials -partition einsum_trivia.ml -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
File "test/einsum/einsum_trivia.ml", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/einsum/einsum_trivia.ml _build/.sandbox/51f25bb9cbc27130c1b450298f6a55b1/default/test/einsum/einsum_trivia.ml.corrected
diff --git a/_build/default/test/einsum/einsum_trivia.ml b/_build/.sandbox/51f25bb9cbc27130c1b450298f6a55b1/default/test/einsum/einsum_trivia.ml.corrected
index 2bcae70..b90a9a4 100644
--- a/_build/default/test/einsum/einsum_trivia.ml
+++ b/_build/.sandbox/51f25bb9cbc27130c1b450298f6a55b1/default/test/einsum/einsum_trivia.ml.corrected
@@ -976,144 +976,144 @@ let%expect_test "outer_sum simulating axis concatenation" =
   [%expect
     {|
     HERE: test/einsum/einsum_trivia.ml:975:21
-    ┌────────────────────────────────┐
-    │[9]: ;=>+ shape 0:4,1:5,2:6,3:3 │
-    │┌──────┬──────────────────┐     │
-    ││0 @ 0 │axis 3            │     │
-    │├──────┼──────────────────┤     │
-    ││0 @ 1 │ 0.00  0.00  0.00 │     │
-    ││axis 2│ 0.00  0.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 0.00  0.00  4.00 │     │
-    ││      │ 0.00  0.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││1 @ 1 │ 0.00  1.00  0.00 │     │
-    ││axis 2│ 0.00  1.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 0.00  1.00  4.00 │     │
-    ││      │ 0.00  1.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││2 @ 1 │ 0.00  2.00  0.00 │     │
-    ││axis 2│ 0.00  2.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 0.00  2.00  4.00 │     │
-    ││      │ 0.00  2.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││3 @ 1 │ 0.00  3.00  0.00 │     │
-    ││axis 2│ 0.00  3.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 0.00  3.00  4.00 │     │
-    ││      │ 0.00  3.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││4 @ 1 │ 0.00  4.00  0.00 │     │
-    ││axis 2│ 0.00  4.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 0.00  4.00  4.00 │     │
-    ││      │ 0.00  4.00  5.00 │     │
-    │└──────┴──────────────────┘     │
-    ├────────────────────────────────┤
-    │┌──────┬──────────────────┐     │
-    ││1 @ 0 │axis 3            │     │
-    │├──────┼──────────────────┤     │
-    ││0 @ 1 │ 1.00  0.00  0.00 │     │
-    ││axis 2│ 1.00  0.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 1.00  0.00  4.00 │     │
-    ││      │ 1.00  0.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││1 @ 1 │ 1.00  1.00  0.00 │     │
-    ││axis 2│ 1.00  1.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 1.00  1.00  4.00 │     │
-    ││      │ 1.00  1.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││2 @ 1 │ 1.00  2.00  0.00 │     │
-    ││axis 2│ 1.00  2.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 1.00  2.00  4.00 │     │
-    ││      │ 1.00  2.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││3 @ 1 │ 1.00  3.00  0.00 │     │
-    ││axis 2│ 1.00  3.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 1.00  3.00  4.00 │     │
-    ││      │ 1.00  3.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││4 @ 1 │ 1.00  4.00  0.00 │     │
-    ││axis 2│ 1.00  4.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 1.00  4.00  4.00 │     │
-    ││      │ 1.00  4.00  5.00 │     │
-    │└──────┴──────────────────┘     │
-    ├────────────────────────────────┤
-    │┌──────┬──────────────────┐     │
-    ││2 @ 0 │axis 3            │     │
-    │├──────┼──────────────────┤     │
-    ││0 @ 1 │ 2.00  0.00  0.00 │     │
-    ││axis 2│ 2.00  0.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 2.00  0.00  4.00 │     │
-    ││      │ 2.00  0.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││1 @ 1 │ 2.00  1.00  0.00 │     │
-    ││axis 2│ 2.00  1.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 2.00  1.00  4.00 │     │
-    ││      │ 2.00  1.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││2 @ 1 │ 2.00  2.00  0.00 │     │
-    ││axis 2│ 2.00  2.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 2.00  2.00  4.00 │     │
-    ││      │ 2.00  2.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││3 @ 1 │ 2.00  3.00  0.00 │     │
-    ││axis 2│ 2.00  3.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 2.00  3.00  4.00 │     │
-    ││      │ 2.00  3.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││4 @ 1 │ 2.00  4.00  0.00 │     │
-    ││axis 2│ 2.00  4.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 2.00  4.00  4.00 │     │
-    ││      │ 2.00  4.00  5.00 │     │
-    │└──────┴──────────────────┘     │
-    ├────────────────────────────────┤
-    │┌──────┬──────────────────┐     │
-    ││3 @ 0 │axis 3            │     │
-    │├─────┼──────────────────┤     │
-    ││0 @ 1 │ 3.00  0.00  0.00 │     │
-    ││axis 2│ 3.00  0.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 3.00  0.00  4.00 │     │
-    ││      │ 3.00  0.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││1 @ 1 │ 3.00  1.00  0.00 │     │
-    ││axis 2│ 3.00  1.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 3.00  1.00  4.00 │     │
-    ││      │ 3.00  1.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││2 @ 1 │ 3.00  2.00  0.00 │     │
-    ││axis 2│ 3.00  2.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 3.00  2.00  4.00 │     │
-    ││      │ 3.00  2.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││3 @ 1 │ 3.00  3.00  0.00 │     │
-    ││axis 2│ 3.00  3.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 3.00  3.00  4.00 │     │
-    ││      │ 3.00  3.00  5.00 │     │
-    │├──────┼──────────────────┤     │
-    ││4 @ 1 │ 3.00  4.00  0.00 │     │
-    ││axis 2│ 3.00  4.00  1.00 │     │
-    ││      │ ...   ...   ...  │     │
-    ││      │ 3.00  4.00  4.00 │     │
-    ││      │ 3.00  4.00  5.00 │     │
-    │└──────┴──────────────────┘     │
-    └────────────────────────────────┘
+    ┌─────────────────────────────────────┐
+    │[9]: ;=>+ shape 0:4,1:5,2:6,3:3      │
+    │┌──────┬────────────────────────────┐│
+    ││0 @ 0 │axis 3                      ││
+    │├──────┼────────────────────────────┤│
+    ││0 @ 1 │ -6.07e-24  4.57e-41   0.00 ││
+    ││axis 2│ 4.57e-41   0.00       1.00 ││
+    ││      │ ...        ...        ...  ││
+    ││      │ 0.00       0.00       4.00 ││
+    ││      │ 0.00       -5.51e-17  5.00 ││
+    │├──────┼────────────────────────────┤│
+    ││1 @ 1 │ -6.07e-24  1.00  0.00      ││
+    ││axis 2│ 4.57e-41   1.00  1.00      ││
+    ││      │ ...        ...   ...       ││
+    ││      │ 0.00       1.00  4.00      ││
+    ││      │ 0.00       1.00  5.00      ││
+    │├──────┼────────────────────────────┤│
+    ││2 @ 1 │ -6.07e-24  2.00  0.00      ││
+    ││axis 2│ 4.57e-41   2.00  1.00      ││
+    ││      │ ...        ...   ...       ││
+    ││      │ 0.00       2.00  4.00      ││
+    ││      │ 0.00       2.00  5.00      ││
+    │├──────┼────────────────────────────┤│
+    ││3 @ 1 │ -6.07e-24  3.00  0.00      ││
+    ││axis 2│ 4.57e-41   3.00  1.00      ││
+    ││      │ ...        ...   ...       ││
+    ││      │ 0.00       3.00  4.00      ││
+    ││      │ 0.00       3.00  5.00      ││
+    │├──────┼────────────────────────────┤│
+    ││4 @ 1 │ -6.07e-24  4.00  0.00      ││
+    ││axis 2│ 4.57e-41   4.00  1.00      ││
+    ││      │ ...        ...   ...       ││
+    ││      │ 0.00       4.00  4.00      ││
+    ││      │ 0.00       4.00  5.00      ││
+    │└──────┴────────────────────────────┘│
+    ├─────────────────────────────────────┤
+    │┌──────┬───────────────────────┐     │
+    ││1 @ 0 │axis 3                 │     │
+    │├──────┼───────────────────────┤     │
+    ││0 @ 1 │ 1.00  4.57e-41   0.00 │     │
+    ││axis 2│ 1.00  0.00       1.00 │     │
+    ││      │ ...   ...        ...  │     │
+    ││      │ 1.00  0.00       4.00 │     │
+    ││      │ 1.00  -5.51e-17  5.00 │     │
+    │├──────┼───────────────────────┤     │
+    ││1 @ 1 │ 1.00  1.00  0.00      │     │
+    ││axis 2│ 1.00  1.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 1.00  1.00  4.00      │     │
+    ││      │ 1.00  1.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││2 @ 1 │ 1.00  2.00  0.00      │     │
+    ││axis 2│ 1.00  2.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 1.00  2.00  4.00      │     │
+    ││      │ 1.00  2.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││3 @ 1 │ 1.00  3.00  0.00      │     │
+    ││axis 2│ 1.00  3.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 1.00  3.00  4.00      │     │
+    ││      │ 1.00  3.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││4 @ 1 │ 1.00  4.00  0.00      │     │
+    ││axis 2│ 1.00  4.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 1.00  4.00  4.00      │     │
+    ││      │ 1.00  4.00  5.00      │     │
+    │└──────┴───────────────────────┘     │
+    ├─────────────────────────────────────┤
+    │┌──────┬───────────────────────┐     │
+    ││2 @ 0 │axis 3                 │     │
+    │├──────┼───────────────────────┤     │
+    ││0 @ 1 │ 2.00  4.57e-41   0.00 │     │
+    ││axis 2│ 2.00  0.00       1.00 │     │
+    ││      │ ...   ...        ...  │     │
+    ││      │ 2.00  0.00       4.00 │     │
+    ││      │ 2.00  -5.51e-17  5.00 │     │
+    │├──────┼───────────────────────┤     │
+    ││1 @ 1 │ 2.00  1.00  0.00      │     │
+    ││axis 2│ 2.00  1.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 2.00  1.00  4.00      │     │
+    ││      │ 2.00  1.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││2 @ 1 │ 2.00  2.00  0.00      │     │
+    ││axis 2│ 2.00  2.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 2.00  2.00  4.00      │     │
+    ││      │ 2.00  2.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││3 @ 1 │ 2.00  3.00  0.00      │     │
+    ││axis 2│ 2.00  3.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 2.00  3.00  4.00      │     │
+    ││      │ 2.00  3.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││4 @ 1 │ 2.00  4.00  0.00      │     │
+    ││axis 2│ 2.00  4.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 2.00  4.00  4.00      │     │
+    ││      │ 2.00  4.00  5.00      │     │
+    │└──────┴───────────────────────┘     │
+    ├─────────────────────────────────────┤
+    │┌──────┬───────────────────────┐     │
+    ││3 @ 0 │axis 3                 │     │
+    │├──────┼───────────────────────┤     │
+    ││0 @ 1 │ 3.00  4.57e-41   0.00 │     │
+    ││axis 2│ 3.00  0.00       1.00 │     │
+    ││      │ ...   ...        ...  │     │
+    ││      │ 3.00  0.00       4.00 │     │
+    ││      │ 3.00  -5.51e-17  5.00 │     │
+    │├──────┼───────────────────────┤     │
+    ││1 @ 1 │ 3.00  1.00  0.00      │     │
+    ││axis 2│ 3.00  1.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 3.00  1.00  4.00      │     │
+    ││      │ 3.00  1.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││2 @ 1 │ 3.00  2.00  0.00      │     │
+    ││axis 2│ 3.00  2.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 3.00  2.00  4.00      │     │
+    ││      │ 3.00  2.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││3 @ 1 │ 3.00  3.00  0.00      │     │
+    ││axis 2│ 3.00  3.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 3.00  3.00  4.00      │     │
+    ││      │ 3.00  3.00  5.00      │     │
+    │├──────┼───────────────────────┤     │
+    ││4 @ 1 │ 3.00  4.00  0.00      │     │
+    ││axis 2│ 3.00  4.00  1.00      │     │
+    ││      │ ...   ...   ...       │     │
+    ││      │ 3.00  4.00  4.00      │     │
+    ││      │ 3.00  4.00  5.00      │     │
+    │└──────┴───────────────────────┘     │
+    └─────────────────────────────────────┘
     |}];
   Train.printf ~here:[%here] ~with_code:false ~with_grad:false ti;
   [%expect
@@ -1125,18 +1125,18 @@ let%expect_test "outer_sum simulating axis concatenation" =
   [%expect
     {|
     HERE: test/einsum/einsum_trivia.ml:1124:21
-    ┌───────────────────────────┐
-    │[7]: =>_tk shape 0:6,1:3   │
-    │┌──────┬──────────────────┐│
-    ││      │axis 1            ││
-    │├──────┼──────────────────┤│
-    ││axis 0│ 0.00  0.00  0.00 ││
-    ││      │ 0.00  0.00  1.00 ││
-    ││      │ ...   ...   ...  ││
-    ││      │ 0.00  0.00  4.00 ││
-    ││      │ 0.00  0.00  5.00 ││
-    │└──────┴──────────────────┘│
-    └───────────────────────────┘
+    ┌─────────────────────────────────────┐
+    │[7]: =>_tk shape 0:6,1:3             │
+    │┌──────┬────────────────────────────┐│
+    ││      │axis 1                      ││
+    │├──────┼────────────────────────────┤│
+    ││axis 0│ -6.07e-24  4.57e-41   0.00 ││
+    ││      │ 4.57e-41   0.00       1.00 ││
+    ││      │ ...        ...        ...  ││
+    ││      │ 0.00       0.00       4.00 ││
+    ││      │ 0.00       -5.51e-17  5.00 ││
+    │└──────┴────────────────────────────┘│
+    └─────────────────────────────────────┘
     |}]
 
 let%expect_test "einsum with a leftmost input axis preserved as output axis" =
(cd _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations && .operations_tutorials.inline-tests/inline-test-runner.exe inline-test-runner operations_tutorials -partition hello_world_op.ml -source-tree-root ../.. -diff-cmd -)
Retrieving commandline, environment, or config file variable ocannl_log_level
Found 0, in the config file
File "test/operations/zero2hero_1of7.ml", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/operations/zero2hero_1of7.ml _build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations/zero2hero_1of7.ml.corrected
diff --git a/_build/default/test/operations/zero2hero_1of7.ml b/_build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations/zero2hero_1of7.ml.corrected
index 5caa1d9..74666b2 100644
--- a/_build/default/test/operations/zero2hero_1of7.ml
+++ b/_build/.sandbox/04f7bc0d9b5bce7f17c75626d283be83/default/test/operations/zero2hero_1of7.ml.corrected
@@ -273,21 +273,21 @@ let%expect_test "Simple gradients hosted" =
   [%expect
     {|
                        #12 *._l
-                        0.00
+                        -8.51e-10
                        #13 grad_*._l
-                        0.00
+                        -8.51e-10
                  #8 +_d                   │#10 f non-emb
-                  0.00                    │ -2.00
+                  -8.51e-10               │ -2.00
                  #9 grad_+_d              │#11 grad_f
-                  0.00                    │ 0.00
+                  2.01e+13                │ -8.51e-10
           #4 *._e            │#6 c non-emb│
-           0.00              │ 1.00e+1    │
+           -8.51e-10         │ 1.00e+1    │
           #5 grad_*._e       │#7 grad_c   │
-           0.00              │ 0.00       │
+           -8.51e-10         │ -8.51e-10  │
     #0 a non-emb│#2 b non-emb│            │
      2.00       │ -3.00      │            │
     #1 grad_a   │#3 grad_b   │            │
-     0.00       │ 0.00       │            │
+     2.01e+13   │ -8.51e-10  │            │
     |}];
   (* Do not update the params: all values and gradients will be at initial points, which are
      specified in the tensor in the brackets. *)
@@ -403,21 +403,21 @@ let%expect_test "Simple gradients virtual" =
   [%expect
     {|
                    #12 *._l
-                    0.00
+                    -8.51e-10
                    #13 grad_*._l Virt/40
                    <void>
              #8 +_d Local/1046            │#10 f non-emb
              <void>                       │ -2.00
              #9 grad_+_d Virt/40          │#11 grad_f
-             <void>                       │ 0.00
+             <void>                       │ -8.51e-10
       #4 *._e Virt/152       │#6 c non-emb│
       <void>                 │ 1.00e+1    │
       #5 grad_*._e Virt/40   │#7 grad_c   │
-      <void>                 │ 0.00       │
+      <void>                 │ -8.51e-10  │
     #0 a non-emb│#2 b non-emb│            │
      2.00       │ -3.00      │            │
     #1 grad_a   │#3 grad_b   │            │
-     0.00       │ 0.00       │            │
+     2.01e+13   │ -8.51e-10  │            │
     |}];
   (* Do not update the params: all values and gradients will be at initial points, which are
      specified in the tensor in the brackets. *)
File "test/training/bigram.expected", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/training/bigram.expected _build/default/test/training/bigram.exe.output
diff --git a/_build/default/test/training/bigram.expected b/_build/default/test/training/bigram.exe.output
index 47b6993..94240a3 100644
--- a/_build/default/test/training/bigram.expected
+++ b/_build/default/test/training/bigram.exe.output
@@ -14,20 +14,20 @@ input_size: 229000
 ││      │ 8.92e-1  6.95e-1  ...  2.32e-1  4.84e-2 ││
 │└──────┴─────────────────────────────────────────┘│
 └──────────────────────────────────────────────────┘
-Epoch 0, loss=2.370636
+Epoch 0, loss=2.361461
                                                                                                                                       #38 /._batch_loss
-                                                                                                                                       2.37
+                                                                                                                                       2.36
                                                                                                                                       #39 grad_/._batch_loss
                                                                                                                                        1.00
                                                                                                                                    #36 =>                                                                                                                                         │#35 1000 Virt/40
-                                                                                                                                    2.37e+3                                                                                                                                       │<void>
+                                                                                                                                    2.36e+3                                                                                                                                       │<void>
                                                                                                                                    #37 grad_=>                                                                                                                                    │
                                                                                                                                     1.00e-3                                                                                                                                       │
                                                                                                                                 #33 neg_loss                                                                                                                                      │
-                                                                                                                                 2.46                                                                                                                                             │
+                                                                                                                                 2.43                                                                                                                                             │
                                                                                                                                  2.63                                                                                                                                             │
                                                                                                                                  ...                                                                                                                                              │
-                                                                                                                                 4.05                                                                                                                                             │
+                                                                                                                                 4.08                                                                                                                                             │
                                                                                                                                  3.60                                                                                                                                             │
                                                                                                                                 #34 grad_neg_loss                                                                                                                                 │
                                                                                                                                  1.00e-3                                                                                                                                          │
@@ -36,10 +36,10 @@ Epoch 0, loss=2.370636
                                                                                                                                  1.00e-3                                                                                                                                          │
                                                                                                                                  1.00e-3                                                                                                                                          │
                                                                                                                                    #31 log                                                                                                                                        │
-                                                                                                                                    -2.46                                                                                                                                         │
+                                                                                                                                    -2.43                                                                                                                                         │
                                                                                                                                     -2.63                                                                                                                                         │
                                                                                                                                     ...                                                                                                                                           │
-                                                                                                                                    -4.05                                                                                                                                         │
+                                                                                                                                    -4.08                                                                                                                                         │
                                                                                                                                     -3.60                                                                                                                                         │
                                                                                                                                    #32 grad_log                                                                                                                                   │
                                                                                                                                     -1.00e-3                                                                                                                                      │
@@ -48,17 +48,17 @@ Epoch 0, loss=2.370636
                                                                                                                                     -1.00e-3                                                                                                                                      │
                                                                                                                                     -1.00e-3                                                                                                                                      │
                                                                                                                              #29 =>_output_probs                                                                                                                                  │
-                                                                                                                              8.49e-2                                                                                                                                             │
-                                                                                                                              7.14e-2                                                                                                                                             │
+                                                                                                                              8.76e-2                                                                                                                                             │
+                                                                                                                              7.15e-2                                                                                                                                             │
                                                                                                                               ...                                                                                                                                                 │
-                                                                                                                              1.72e-2                                                                                                                                             │
+                                                                                                                              1.68e-2                                                                                                                                             │
                                                                                                                               2.72e-2                                                                                                                                             │
                                                                                                                              #30 grad_=>_output_probs                                                                                                                             │
-                                                                                                                              -1.17e-2                                                                                                                                            │
-                                                                                                                              -1.40e-2                                                                                                                                            │
+                                                                                                                              -1.14e-2                                                                                                                                            │
+                                                                                                                              -1.39e-2                                                                                                                                            │
                                                                                                                               ...                                                                                                                                                 │
-                                                                                                                              -5.78e-2                                                                                                                                            │
-                                                                                                                              -3.66e-2                                                                                                                                            │
+                                                                                                                              -5.92e-2                                                                                                                                            │
+                                                                                                                              -3.67e-2                                                                                                                                            │
                                                                                                                   #27 *.                                                                                                                                                          │
                                                                                                                    0.00     0.00  ...  0.00  0.00                                                                                                                                 │
                                                                                                                    0.00     0.00  ...  0.00  0.00                                                                                                                                 │
@@ -66,71 +66,71 @@ Epoch 0, loss=2.370636
                                                                                                                    0.00     0.00  ...  0.00  0.00                                                                                                                                 │
                                                                                                                    2.72e-2  0.00  ...  0.00  0.00                                                                                                                                 │
                                                                                                                   #28 grad_*.                                                                                                                                                     │
-                                                                                                                   -1.17e-2  -1.17e-2  ...  -1.17e-2  -1.17e-2                                                                                                                    │
-                                                                                                                   -1.40e-2  -1.40e-2  ...  -1.40e-2  -1.40e-2                                                                                                                    │
+                                                                                                                   -1.14e-2  -1.14e-2  ...  -1.14e-2  -1.14e-2                                                                                                                    │
+                                                                                                                   -1.39e-2  -1.39e-2  ...  -1.39e-2  -1.39e-2                                                                                                                    │
                                                                                                                    ...       ...       ...  ...       ...                                                                                                                         │
-                                                                                                                   -5.78e-2  -5.78e-2  ...  -5.78e-2  -5.78e-2                                                                                                                    │
-                                                                                                                   -3.66e-2  -3.66e-2  ...  -3.66e-2  -3.66e-2                                                                                                                    │
+                                                                                                                   -5.92e-2  -5.92e-2  ...  -5.92e-2  -5.92e-2                                                                                                                    │
+                                                                                                                   -3.67e-2  -3.67e-2  ...  -3.67e-2  -3.67e-2                                                                                                                    │
                                                      #20 /._mlp_@|_input                                                                            │                                                #3 @|_output                                                                 │
-                                                      4.48e-2  2.51e-2  ...  2.61e-2  7.03e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
-                                                      1.08e-1  2.04e-2  ...  2.14e-2  2.25e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
+                                                      4.46e-2  2.52e-2  ...  2.59e-2  7.27e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
+                                                      1.10e-1  2.02e-2  ...  2.11e-2  2.23e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
                                                       ...      ...      ...  ...      ...                                                           │                                                 ...   ...   ...  ...   ...                                                  │
-                                                      2.15e-2  1.07e-2  ...  6.43e-2  1.27e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
-                                                      2.72e-2  3.04e-2  ...  3.33e-2  4.89e-2                                                       │                                                 1.00  0.00  ...  0.00  0.00                                                 │
+                                                      2.10e-2  1.03e-2  ...  6.59e-2  1.24e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
+                                                      2.72e-2  3.03e-2  ...  3.36e-2  4.86e-2                                                       │                                                 1.00  0.00  ...  0.00  0.00                                                 │
                                                      #21 grad_/._mlp_@|_input                                                                       │#1 tensor                                                                                                                    │
                                                       0.00      0.00  ...  0.00  0.00                                                               │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │ ... │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │
                                                       0.00      0.00  ...  0.00  0.00                                                               │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │
                                                       ...       ...   ...  ...   ...                                                                │ ...   ...   ...  ...   ...  │ ...   ...   ...  ...   ...  │     │ ...   ...   ...  ...   ...  │ ...   ...   ...  ...   ...  │
                                                       0.00      0.00  ...  0.00  0.00                                                               │ 0.00  0.00  ...  0.00  0.00 │ 1.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │
-                                                      -3.66e-2  0.00  ...  0.00  0.00                                                               │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 1.00  0.00  ...  0.00  0.00 │
+                                                      -3.67e-2  0.00  ...  0.00  0.00                                                               │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 1.00  0.00  ...  0.00  0.00 │
 [#16 exp_counts]│                                                            #18 =>                                                                 │                                                                                                                             │
                 │                                                             1.28e+2                                                               │                                                                                                                             │
                 │                                                             1.55e+2                                                               │                                                                                                                             │
                 │                                                             ...                                                                   │                                                                                                                             │
-                │                                                             2.13e+2                                                               │                                                                                                                             │
-                │                                                             1.26e+2                                                               │                                                                                                                             │
+                │                                                             2.18e+2                                                               │                                                                                                                             │
+                │                                                             1.27e+2                                                               │                                                                                                                             │
                 │                                                            #19 grad_=>                                                            │                                                                                                                             │
-                │                                                             7.76e-6                                                               │                                                                                                                             │
-                │                                                             6.44e-6                                                               │                                                                                                                             │
+                │                                                             7.75e-6                                                               │                                                                                                                             │
+                │                                                             6.43e-6                                                               │                                                                                                                             │
                 │                                                             ...                                                                   │                                                                                                                             │
-                │                                                             4.67e-6                                                               │                                                                                                                             │
-                │                                                             7.87e-6                                                               │                                                                                                                             │
+                │                                                             4.57e-6                                                               │                                                                                                                             │
+                │                                                             7.86e-6                                                               │                                                                                                                             │
                 │                                            #16 exp_counts                                                                         │                                                                                                                             │
-                │                                             5.77     3.24  ...  3.36     9.05                                                     │                                                                                                                             │
-                │                                             1.68e+1  3.16  ...  3.32     3.50                                                     │                                                                                                                             │
+                │                                             5.76     3.26  ...  3.34     9.38                                                     │                                                                                                                             │
+                │                                             1.72e+1  3.15  ...  3.28     3.47                                                     │                                                                                                                             │
                 │                                             ...      ...   ...  ...      ...                                                      │                                                                                                                             │
-                │                                             4.59     2.28  ...  1.37e+1  2.72                                                     │                                                                                                                             │
-                │                                             3.46     3.86  ...  4.23     6.20                                                     │                                                                                                                             │
+                │                                             4.61     2.26  ...  1.44e+1  2.73                                                     │                                                                                                                             │
+                │                                             3.46     3.85  ...  4.28     6.18                                                     │                                                                                                                             │
                 │                                            #17 grad_exp_counts                                                                    │                                                                                                                             │
-                │                                             7.76e-6   7.76e-6  ...  7.76e-6  7.76e-6                                              │                                                                                                                             │
-                │                                             6.44e-6   6.44e-6  ...  6.44e-6  6.44e-6                                              │                                                                                                                             │
+                │                                             7.75e-6   7.75e-6  ...  7.75e-6  7.75e-6                                              │                                                                                                                             │
+                │                                             6.43e-6   6.43e-6  ...  6.43e-6  6.43e-6                                              │                                                                                                                             │
                 │                                             ...       ...      ...  ...      ...                                                  │                                                                                                                             │
-                │                                             4.67e-6   4.67e-6  ...  4.67e-6  4.67e-6                                              │                                                                                                                             │
-                │                                             -2.81e-4  7.87e-6  ...  7.87e-6  7.87e-6                                              │                                                                                                                             │
+                │                                             4.57e-6   4.57e-6  ...  4.57e-6  4.57e-6                                              │                                                                                                                             │
+                │                                             -2.80e-4  7.86e-6  ...  7.86e-6  7.86e-6                                              │                                                                                                                             │
                 │#14 *                                                                                                                              │                                                                                                                             │
-                │ 1.75  1.17     ...  1.21  2.20                                                                                                    │                                                                                                                             │
-                │ 2.82  1.15     ...  1.20  1.25                                                                                                    │                                                                                                                             │
+                │ 1.75  1.18     ...  1.20  2.23                                                                                                    │                                                                                                                             │
+                │ 2.84  1.14     ...  1.18  1.24                                                                                                    │                                                                                                                             │
                 │ ...   ...      ...  ...   ...                                                                                                     │                                                                                                                             │
-                │ 1.52  8.27e-1  ...  2.62  1.00                                                                                                    │                                                                                                                             │
-                │ 1.24  1.35     ...  1.44  1.82                                                                                                    │                                                                                                                             │
+                │ 1.52  8.16e-1  ...  2.66  1.00                                                                                                    │                                                                                                                             │
+                │ 1.24  1.34     ...  1.45  1.82                                                                                                    │                                                                                                                             │
                 │#15 grad_*                                                                                                                         │                                                                                                                             │
-                │ 4.48e-5   2.51e-5  ...  2.61e-5  7.03e-5                                                                                          │                                                                                                                             │
-                │ 1.08e-4   2.04e-5  ...  2.14e-5  2.25e-5                                                                                          │                                                                                                                             │
+                │ 4.46e-5   2.52e-5  ...  2.59e-5  7.27e-5                                                                                          │                                                                                                                             │
+                │ 1.10e-4   2.02e-5  ...  2.11e-5  2.23e-5                                                                                          │                                                                                                                             │
                 │ ...       ...      ...  ...      ...                                                                                              │                                                                                                                             │
-                │ 2.15e-5   1.07e-5  ...  6.43e-5  1.27e-5                                                                                          │                                                                                                                             │
-                │ -9.72e-4  3.04e-5  ...  3.33e-5  4.89e-5                                                                                          │                                                                                                                             │
+                │ 2.10e-5   1.03e-5  ...  6.59e-5  1.24e-5                                                                                          │                                                                                                                             │
+                │ -9.72e-4  3.03e-5  ...  3.36e-5  4.86e-5                                                                                          │                                                                                                                             │
                 │├─#12 +                                                                                                                            │                                                                                                                             │
-                ││  1.15     1.46  ...  2.56     1.52                                                                                               │                                                                                                                             │
-                ││  9.91e-1  1.42  ...  1.15     8.27e-1                                                                                            │                                                                                                                             │
-                ││  ...      ...   ...  ...      ...                                                                                                │                                                                                                                             │
-                ││  4.79     1.54  ...  9.00e-1  2.62                                                                                               │                                                                                                                             │
-                ││  5.19     1.69  ...  1.05     1.00                                                                                               │                                                                                                                             │
+                ││  1.20  1.46  ...  2.58     1.52                                                                                                  │                                                                                                                             │
+                ││  1.02  1.42  ...  1.13     8.16e-1                                                                                               │                                                                                                                             │
+                ││  ...   ...   ...  ...      ...                                                                                                   │                                                                                                                             │
+                ││  4.86  1.54  ...  8.89e-1  2.66                                                                                                  │                                                                                                                             │
+                ││  5.25  1.69  ...  1.05     1.00                                                                                                  │                                                                                                                             │
                 ││ #13 grad_+                                                                                                                       │                                                                                                                             │
-                ││  1.09e-3   0.00  ...  -2.68e-3  -4.50e-4                                                                                         │                                                                                                                             │
-                ││  9.22e-4   0.00  ...  1.53e-3   7.70e-4                                                                                          │                                                                                                                             │
+                ││  1.06e-3   0.00  ...  -2.71e-3  -4.82e-4                                                                                         │                                                                                                                             │
+                ││  8.98e-4   0.00  ...  1.48e-3   7.44e-4                                                                                          │                                                                                                                             │
                 ││  ...       ...   ...  ...       ...                                                                                              │                                                                                                                             │
-                ││  -3.60e-3  0.00  ...  1.19e-3   -3.36e-3                                                                                         │                                                                                                                             │
-                ││  -3.33e-3  0.00  ...  3.95e-4   -8.07e-5                                                                                         │                                                                                                                             │
+                ││  -3.28e-3  0.00  ...  1.15e-3   -3.24e-3                                                                                         │                                                                                                                             │
+                ││  -3.10e-3  0.00  ...  3.70e-4   -1.00e-4                                                                                         │                                                                                                                             │
                 ││ ├─[#9 w]                                                                                                                         │                                                                                                                             │
                 ││ └─#11 1 Virt/40                                                                                                                  │                                                                                                                             │
                 ││   <void>                                                                                                                         │                                                                                                                             │
@@ -145,11 +145,11 @@ Epoch 0, loss=2.370636
                 │     0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00   │                                                                                                                             │
                 │     ...   ...   ...  ...   ...  │ ...   ...   ...  ...   ...  │     │ ...   ...   ...  ...   ...  │ ...   ...   ...  ...   ...    │                                                                                                                             │
                 │     0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  1.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  1.00   │                                                                                                                             │
-                │     0.00  0.00  ...  0.00  0.00 │ 1.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00   │                                                                                                                             │yiyabuaryrwsrioshlrbvi
+                │     0.00  0.00  ...  0.00  0.00 │ 1.00  0.00  ...  0.00  0.00 │     │ 0.00  0.00  ...  0.00  0.00 │ 0.00  0.00  ...  0.00  0.00   │                                                                                                                             │yiyabuaryrwsrioshlraui
 y
-zaqyfdhawgzhfenorih
-zauzvuchanqviceycctushaimnaeibbbuza
-zrcshxsxdcyr
+zaqyfdhawgylgenorih
+zauzvubjimvreefzaerrreeimnaeibbbuzaann
+zaxsxdcyr
 zaaxxn
 ydqy
 viroh
@@ -160,8 +160,8 @@ yunm
 zxcx
 v
 zashaouucniri
-fel
-vuosmuqyuzqkoar
+gdjgcvismuqyuzqkoar
 zispufkphxooin
 zan
-vcripzakyojchafikvi
+vcripzakyojchaghere
+wyaxygqlelhihakpouqsgjkkhanan
File "test/training/moons_demo.expected", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/training/moons_demo.expected _build/default/test/training/moons_demo.exe.output
diff --git a/_build/default/test/training/moons_demo.expected b/_build/default/test/training/moons_demo.exe.output
index 3d2e18a..d4d9953 100644
--- a/_build/default/test/training/moons_demo.expected
+++ b/_build/default/test/training/moons_demo.exe.output
@@ -2,49 +2,49 @@ Retrieving commandline, environment, or config file variable ocannl_log_level
 Found 0, in the config file
 Half-moons scatterplot and decision boundary:
 ┌────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│************************************#******************************************************.........│
-│*****************************##*#*#***###**#**********************************************..........│
-│*********************##**#*#*###***#*##*#**#*##******************************************...........│
-│*******************####*##########***#####**####*****************************************...........│
-│**************#**###**#**#*#*#*###*#*#**#*#####*****##**********************************............│
-│***************#####*#*##****##**####*####**#**#*#*#***********************************.............│
-│*************#*###*#*#*#*******************#*#*#########******************************..............│
-│*********#**##*#*#*#**************************####*###*#******************************..............│
-│********#****###*#*******************************#**#*#*##*#*************************...............│
-│******#*#*#*#####************************************#####**************************................│
-│************###*************.......******************#*#****************************................│
-│********###**#************...........******************###*##**********************.................│
-│******####*###***********.............********************###**#*******************.................│
-│*****###*##*#***********..........%%....****************#*##*#********************.............%....│
-│****#*#####************........%....%....*****************####**#****************..............%....│
-│****##*#*#***********..........%%%%........****************##********************............%%.%%..│
-│***####*#***********.............%..%.......****************####****************.............%..%.%.│
-│**##*#**#**********.............%.%%..........*************###**##*************..............%..%..%│
-│*##*#*##**********.............%.%%.%..........***********#**##**#*************..............%.%..%.│
-│***####**********..............%%.%%.%...........************#####*#**********...............%....%.│
-│*##*##*#********................%...%.............**********##*#*#***********..............%.%%%.%..│
-│#**#**#********................%%%.%%...............**********#*###**********...............%....%..│
-│####**********.....................%.%.%.............********##*##**********...............%%%%%....│
-│#***##*******....................%%.%%..%..............******#####*#*******................%%%%.%...│
-│##*#********......................%%%.%.%...............**********##*******..............%..%%%.....│
-│#*#********........................%%.%...................*****#**##******................%.%.%%%...│
-│#**#******..........................%%%%%..%...............******#********...............%%%........│
-│##*******.........................%...%.%%%..................*##***#*****..............%%%.%..%.....│
-│********............................%.%%%%....................**********.............%..%.%%.%......│
-│*******..............................%%.%%%%....................********.................%%.%%......│
-│******.................................%..%..%....................*****............%%%%.%%%%%.......│
-│*****....................................%.%%.%%..%...............................%%%%%%.%.%........│
-│****....................................%%.%%.%%%................................%%.%.%...%.........│
-│***..........................................%%%.............................%.%.%..%%..%...........│
-│**...........................................%.%%.%%%%%..................%%%.%%.%.%..%..............│
-│*...........................................%%%.%%%%%%..%.%%..%%.%%%%%%.%%.%%%....%.................│
-│.............................................%..%...%%%%...%.%%%.%%.%%.....%%..%%%..%...............│
-│....................................................%..%%%%%.%.%.%.%.%..%%%%..%%....................│
-│...................................................%%%...%%.%.%...%...%%..%..%%.....................│
-│.....................................................%....%..%.%%%%%................................│
+│************************************#***************************************************************│
+│*****************************##*#*#***###**#********************************************************│
+│*********************##**#*#*###***#*##*#**#*##*****************************************************│
+│*******************####*##########***#####**####***************************************************.│
+│**************#**###**#**#*#*#*###*#*#**#*#####*****##********************************************..│
+│***************#####*#*##****##**####*####**#**#*#*#*********************************************...│
+│*************#*###*#*#*#*******************#*#*#########****************************************....│
+│*********#**##*#*#*#**************************####*###*#***************************************.....│
+│********#****###*#*******************************#**#*#*##*#**********************************......│
+│******#*#*#*#####***************...******************#####***********************************.......│
+│************###***************.......****************#*#************************************........│
+│********###**#**************..........*****************###*##******************************.........│
+│******####*###************..............******************###**#**************************..........│
+│*****###*##*#************.........%%.....***************#*##*#**************************.......%....│
+│****#*#####*************.......%....%.....****************####**#**********************........%....│
+│****##*#*#*************........%%%%........****************##*************************.......%%.%%..│
+│***####*#*************...........%..%.......****************####*********************........%..%.%.│
+│**##*#**#*************..........%.%%.........**************###**##******************.........%..%..%│
+│*##*#*##*************..........%.%%.%.........************#**##**#*****************..........%.%..%.│
+│***####*************...........%%.%%.%.........**************#####*#**************...........%....%.│
+│*##*##*#***********.............%...%...........************##*#*#***************..........%.%%%.%..│
+│#**#**#***********.............%%%.%%...........**************#*###*************............%....%..│
+│####*************..................%.%.%..........***********##*##*************............%%%%%....│
+│#***##**********.................%%.%%..%..........**********#####*#***********............%%%%.%...│
+│##*#***********...................%%%.%.%............*************##**********...........%..%%%.....│
+│#*#***********.....................%%.%................********#**##*********.............%.%.%%%...│
+│#**#*********.......................%%%%%..%.............********#***********............%%%........│
+│##**********......................%...%.%%%...............****##***#********...........%%%.%..%.....│
+│***********.........................%.%%%%..................****************.........%..%.%%.%......│
+│***********..........................%%.%%%%..................*************..............%%.%%......│
+│**********.............................%..%..%.......................*****.........%%%%.%%%%%.......│
+│*********................................%.%%.%%..%...............................%%%%%%.%.%........│
+│********................................%%.%%.%%%................................%%.%.%...%.........│
+│*******......................................%%%.............................%.%.%..%%..%...........│
+│*******......................................%.%%.%%%%%..................%%%.%%.%.%..%..............│
+│******......................................%%%.%%%%%%..%.%%..%%.%%%%%%.%%.%%%....%.................│
+│*****........................................%..%...%%%%...%.%%%.%%.%%.....%%..%%%..%...............│
+│****................................................%..%%%%%.%.%.%.%.%..%%%%..%%....................│
+│***................................................%%%...%%.%.%...%...%%..%..%%.....................│
+│***..................................................%....%..%.%%%%%................................│
 └────────────────────────────────────────────────────────────────────────────────────────────────────┘Loss:
 ┌────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│ 2.43e+1│-                                                                                                   │
+│ 3.13e+1│-                                                                                                   │
 │        │                                                                                                    │
 │        │                                                                                                    │
 │        │                                                                                                    │
@@ -77,55 +77,55 @@ Half-moons scatterplot and decision boundary:
 │        │                                                                                                    │
 │        │                                                                                                    │
 │        │                                                                                                    │
-│        │-     -                                                                                             │
-│        │-    -                                                                                              │
-│        │ -      -           -                                                                               │
-│        │   - --   -- -  -      - -                                                                          │
-│        │ - - -- - -    -  - --    - - -- - -- -    -  -      - -                                            │
-│        │---- ---- -- - -- - -- - -- -  -      - -- - -  - --    - - -- -       - -                          │
+│        │                                                                                                    │
+│        │-                                                                                                   │
+│        │ -                                                                                                  │
+│        │   -  - -                     -                                                                     │
+│        │-    --   --   -  - -- - -- -    - -                                                                │
+│        │---- ---- -- - -- -  -         -    - - -- - -- -  -   -  -                                         │
 │ 0.00   │----------------------------------------------------------------------------------------------------│
 ├────────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
 │        │0.00                                                                                         4.79e+3│
 │        │                                                step                                                │
 └────────┴────────────────────────────────────────────────────────────────────────────────────────────────────┘Log-loss, for better visibility:
 ┌─────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│ 3.19    │                                                                                                    │
+│ 3.44    │                                                                                                    │
 │         │-                                                                                                   │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
-│         │-    --                                                                                             │
-│         │ - - -  -       -   -                                                                               │
-│         │     -- - -- - -  -  - - -  -  -      -                                                             │
-│         │ - - -- - --    - - -     -   -  - --      -  -   -  - -                                            │
-│         │---- ---- -- - -  - -- - -  -  -      - --   -  -       - -    -       -                            │
-│         │- -- -- - -- - -- - -- -  - -  -      -    -       -        --           -                          │
-│         │-  - ----  - -      -              -                             -  - -    -                        │
-│         │-  -  ---     - -      - --      -  -                             -                     -           │
-│         │- -  - --      -     -        -    --                                 -     -                       │
-│         │-  --      -   -  -               -   - -             -                                             │
-│l        │-   -  - -             - ----  - -         - -                -           -           -             │
-│o        │-  -   ---   - -- - -  ---            - -           -- -    -   -             -  -                  │
-│g        │-- --  -       -             -  -                    -  -                                           │
-│         │--  -        - ---  -      -       - - - --  -         -         -              -         --        │
-│l        │      ---  ----  - - - -      - - -      --      -       -       -      -      -         -          │
-│o        │--       -  - -    - --   -  -      --    -                        -  -           -  -              │
-│s        │--  -   --  - - - -     --        -            - --        -         -     -       - -              │
-│s        │-- --        -       -       -       -  -   -     -            -                                    │
-│         │-  -        - - - -           --   -               -         -  -    -                              │
-│         │  -        --  -           -   -    -  -         -  -                                  -            │
-│         │ -     -  -   - -     -        -          -   -       -           - -                               │
-│         │  -        -   -     -                  -  -   --   -             -         -                       │
-│         │    -     --  -                      -                      -    -                                  │
-│         │-   -               -               -                             -                        -        │
-│         │           -                                  -    -         -        -             -               │
-│         │                                   -                                                                │
-│         │                 -        -                               -                                         │
-│         │                                                                             -                      │
-│         │ -       -                                                                                          │
-│         │                        -                                                                           │
-│         │                          -                                                                         │
+│         │-                                                                                                   │
+│         │ -                                                                                                  │
+│         │-  - -- - --        --        -  -                                                                  │
+│         │ -   - -- -- - -- -    - -- -  -   -                                                                │
+│         │---- ---- -- - --                   - - -- - --                                                     │
+│         │---- - -- ---- -- - --                          - --   -- -    -                                    │
+│         │-    -  - -  - --    -        -                      -      --   -                                  │
+│         │-    -  - -    -- -  -                                                      -                       │
+│         │-  - -    - -   -   --           -                                    -         -                   │
+│         │- --      ---- -    -- -           -                                       -                        │
+│l        │-         -   -          -     - - -                                       -                        │
+│o        │--        -       -- -                         -         -        - -        --                     │
+│g        │ -       -   -      -- -     --         -               -  -         -    -                         │
+│         │    --- - -- -    - - -  -  --                   -               -                                  │
+│l        │--    -    -     - -    -     -   -  -  --   -    -  --      -           -       -                  │
+│o        │-- --        ---   --- ---- --            - -          -        -               -                   │
+│s        │-  -  -    -   -   -    -- -  --- -- - -   -      -   -       -       --                            │
+│s        │   -  -----   -     -- -     -  - ----    -       - - -     -         -     -                       │
+│         │ -       -- -     --  - -  -      -         -      -   - -  -                   -  -                │
+│         │-       -         --     - -  --        -  -       -   -  - -   -   -   -                           │
+│         │-           -- - -   -   -    -      -   -                         -           -                    │
+│         │    ---   -      ---  -    -  --   -         --     -        -     -   -   -                        │
+│         │     -  -       -  -  - -  -        -     -        -    -      -                                    │
+│         │            -    -                -    ---   -  -      -      -       -     -                       │
+│         │         --      -                                                            -                     │
+│         │-    -                              -         -   -          -                                      │
+│         │              - -    -                               -           -                                  │
+│         │                 -                            -                                                     │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │ -1.00e+1│----------------------------------------------------------------------------------------------------│
File "test/training/moons_demo_parallel.expected", line 1, characters 0-0:
/usr/bin/git --no-pager diff --no-index --color=always -u _build/default/test/training/moons_demo_parallel.expected _build/default/test/training/moons_demo_parallel.exe.output
diff --git a/_build/default/test/training/moons_demo_parallel.expected b/_build/default/test/training/moons_demo_parallel.exe.output
index 7d67fbc..b8acfcd 100644
--- a/_build/default/test/training/moons_demo_parallel.expected
+++ b/_build/default/test/training/moons_demo_parallel.exe.output
@@ -1,3 +1,138 @@
 Retrieving commandline, environment, or config file variable ocannl_log_level
 Found 0, in the config file
-Success
+
+Half-moons scatterplot and decision boundary:
+┌────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│************************************#***************************************************************│
+│*****************************##*#*#***###**#********************************************************│
+│*********************##**#*#*###***#*##*#**#*##*****************************************************│
+│*******************####*##########***#####**####***************************************************.│
+│**************#**###**#**#*#*#*###*#*#**#*#####*****##*******************************************...│
+│***************#####*#*##****##**####*####**#**#*#*#******************************************......│
+│*************#*###*#*#*#*******************#*#*#########************************************........│
+│*********#**##*#*#*#**************************####*###*#**********************************..........│
+│********#****###*#*******************************#**#*#*##*#****************************............│
+│******#*#*#*#####************************************#####****************************..............│
+│************###******************.......*************#*#*****************************...............│
+│********###**#**************..............*************###*##***********************................│
+│******####*###***********..................***************###**#*******************.................│
+│*****###*##*#************.........%%........************#*##*#********************.............%....│
+│****#*#####*************.......%....%........*************####**#****************..............%....│
+│****##*#*#**************.......%%%%...........*************##********************............%%.%%..│
+│***####*#**************..........%..%..........*************####****************.............%..%.%.│
+│**##*#**#**************.........%.%%............***********###**##************...............%..%..%│
+│*##*#*##***************........%.%%.%............*********#**##**#***********................%.%..%.│
+│***####****************........%%.%%.%............***********#####*#********.................%....%.│
+│*##*##*#**************..........%...%..............*********##*#*#*********................%.%%%.%..│
+│#**#**#***************.........%%%.%%...............**********#*###*******..................%....%..│
+│####******************.............%.%.%.............********##*##*******..................%%%%%....│
+│#***##****************...........%%.%%..%..............******#####*#****...................%%%%.%...│
+│##*#******************............%%%.%.%...............**********##***..................%..%%%.....│
+│#*#******************..............%%.%...................*****#**##*.....................%.%.%%%...│
+│#**#*****************...............%%%%%..%................*****#**.....................%%%........│
+│##*******************.............%...%.%%%..................*##***#...................%%%.%..%.....│
+│*********************...............%.%%%%.....................***...................%..%.%%.%......│
+│*********************................%%.%%%%.............................................%%.%%......│
+│********************...................%..%..%.....................................%%%%.%%%%%.......│
+│********************.....................%.%%.%%..%...............................%%%%%%.%.%........│
+│*******************.....................%%.%%.%%%................................%%.%.%...%.........│
+│*******************..........................%%%.............................%.%.%..%%..%...........│
+│******************...........................%.%%.%%%%%..................%%%.%%.%.%..%..............│
+│******************..........................%%%.%%%%%%..%.%%..%%.%%%%%%.%%.%%%....%.................│
+│*****************............................%..%...%%%%...%.%%%.%%.%%.....%%..%%%..%...............│
+│*****************...................................%..%%%%%.%.%.%.%.%..%%%%..%%....................│
+│****************...................................%%%...%%.%.%...%...%%..%..%%.....................│
+│****************.....................................%....%..%.%%%%%................................│
+└────────────────────────────────────────────────────────────────────────────────────────────────────┘
+Batch Log-loss:
+┌─────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│ 8.04    │-                                                                                                   │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │-                                                                                                   │
+│         │-                                                                                                   │
+│         │   -                                                                                                │
+│         │--   -  -  - -  -                          -                     -  -                      -        │
+│         │ - - -- - -- - -- - -- - -- - -- - -- - --   -- - -- - -- - -- - --      -    - -                 - │
+│         │--------- -- - -- - -- - -- - -- - -- - -- - -- - -- - --             --   -- -  - -       -        │
+│         │---          - ---- - -- --    -    - - -  -  - -       - - -       -    -           -- - -  -      │
+│         │   --  --   -- -         -    -  - -               - -       - - -       -                 -   -    │
+│         │- -- -  - - --      -- --   -  --    -   --  -         --           -         - - -       -     -   │
+│         │   --           ---  ---   -  -  -- -  --   --      -             -   -       - -      -           -│
+│b        │       -                 -         -  -          - -                        -    -       --      -  │
+│a        │    -        - -                -             -   -       -- -  -     - -            -              │
+│t        │  --                -        -             - -                - --    -    - -                    --│
+│c        │                           -         -    -     -            --                                 -   │
+│h        │                                           -- -   -       -           -    -               -        │
+│         │        -                               -                                  --                       │
+│l        │ --        -       -        -                        -  -               -    -                      │
+│o        │                                                                               -                    │
+│g        │                                                                                                    │
+│         │                                      -                -                                            │
+│l        │                                                -                                                   │
+│o        │                                                      -                                             │
+│s        │                                                                                                    │
+│s        │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│ -1.04e+1│  - ------------------------------------------------------------------------------------------------│
+├─────────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│         │0.00                                                                                         1.19e+3│
+│         │                                                step                                                │
+└─────────┴────────────────────────────────────────────────────────────────────────────────────────────────────┘
+Epoch Log-loss:
+┌─────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│ 8.75│-                                                                                                   │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│e    │                                                                                                    │
+│p    │   -                                                                                                │
+│o    │ -                                                                                                  │
+│c    │                                                                                                    │
+│h    │     -- -                                                                                           │
+│     │          -- -  -        -                                                                          │
+│l    │               -    --         -                                                                    │
+│o    │                  -    -  - - -    -- -            -                                                │
+│g    │                                 -      --   -                   -                                  │
+│     │                                           -  - - -     -                                           │
+│l    │                                                                                           -        │
+│o    │                                                     - -                      -                     │
+│s    │                                                                    -                               │
+│s    │                                                            -            -                          │
+│     │                                                          -                     -                   │
+│     │                                                             - -  -                                 │
+│     │                                                                       -                            │
+│     │                                                                      -     -    -                - │
+│     │                                                                                                    │
+│     │                                                                           -       -                │
+│     │                                                                                                    │
+│     │                                                                                      -   -         │
+│     │                                                                                     -       -      │
+│     │                                                                                        -           │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│ 3.55│                                                                                               --   │
+├─────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│     │0.00                                                                                         5.90e+1│
+│     │                                                step                                                │
+└─────┴────────────────────────────────────────────────────────────────────────────────────────────────────┘
\ No newline at end of file
"/usr/bin/env" "bash" "-c" "opam exec -- dune build @install @check @runtest && rm -rf _build" failed with exit status 1
2025-08-09 22:11.24: Job failed: Failed: Build failed