Organisationsahrefsocannl0abd20 ()alpine-3.21-5.3_opam-2.4

alpine-3.21-5.3_opam-2.4

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2025-08-09 21:07.55: New job: test ahrefs/ocannl https://github.com/ahrefs/ocannl.git#refs/heads/master (0abd20bce94cc89208655a47b9fe3b84a3bc4f82) (linux-x86_64:alpine-3.21-5.3_opam-2.4)
Base: ocaml/opam:alpine-3.21-ocaml-5.3@sha256:d6c030813e949275bc4a13bcb712613b7e39a2eaa287092f6084a6bc44d4a5c4
Opam project build

To reproduce locally:

git clone --recursive "https://github.com/ahrefs/ocannl.git" -b "master" && cd "ocannl" && git reset --hard 0abd20bc
cat > Dockerfile <<'END-OF-DOCKERFILE'
FROM ocaml/opam:alpine-3.21-ocaml-5.3@sha256:d6c030813e949275bc4a13bcb712613b7e39a2eaa287092f6084a6bc44d4a5c4
# alpine-3.21-5.3_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 21:07.55: Using cache hint "ahrefs/ocannl-ocaml/opam:alpine-3.21-ocaml-5.3@sha256:d6c030813e949275bc4a13bcb712613b7e39a2eaa287092f6084a6bc44d4a5c4-alpine-3.21-5.3_opam-2.4-83f2c92a8149933d384aef7c4711fb31"
2025-08-09 21:07.55: Using OBuilder spec:
((from ocaml/opam:alpine-3.21-ocaml-5.3@sha256:d6c030813e949275bc4a13bcb712613b7e39a2eaa287092f6084a6bc44d4a5c4)
 (comment alpine-3.21-5.3_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 21:07.55: Waiting for resource in pool OCluster
2025-08-09 21:07.55: Waiting for worker…
2025-08-09 21:07.55: Got resource from pool OCluster
Building on bremusa.ocamllabs.io
All commits already cached
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

(from ocaml/opam:alpine-3.21-ocaml-5.3@sha256:d6c030813e949275bc4a13bcb712613b7e39a2eaa287092f6084a6bc44d4a5c4)
2025-08-09 21:07.58 ---> using "3796098fd0d126823ed854f278abbadfdc00c11994147612c943e9529c5a2921" from cache

/: (comment alpine-3.21-5.3_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 21:07.58 ---> using "eaaa5e79577a38914056e586e718250dd06d3f1958e0073827c7b1f3807787c5" 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
[NOTE] The 'jobs' option was reset, its value was 255 and its new value will vary according to the current number of cores on your machine. You can restore the fixed value using:
           opam option jobs=255 --global
Format upgrade done.

<><> Updating repositories ><><><><><><><><><><><><><><><><><><><><><><><><><><>
[default] Initialised
2025-08-09 21:07.58 ---> using "c2249f8933ae50245746ed5374725cc9093093eb3ff835b7f0716c1631cbd18f" from cache

/src: (run (shell "uname -rs && opam exec -- ocaml -version && opam --version"))
Linux 6.8.0-63-generic
The OCaml toplevel, version 5.3.0
2.4.1
2025-08-09 21:07.58 ---> using "cff78d7485641ee4d4d9eca158d2ed6d201b93d46d2b0736269d1a45c06edd88" from cache

/src: (workdir /src)

/src: (run (shell "sudo chown opam /src"))
2025-08-09 21:07.58 ---> using "3ef68c3907f00c424b8ce3abb4153990165fa9773eaeb7b0c229472c62046fde" 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 21:07.58 ---> using "a050f52a7ba9cddb96f0ba46b70b7721a9398e5d6dc14671231b2197d95b1de7" from cache

/src: (copy (src neural_nets_lib.opam arrayjit.opam) (dst ./))
2025-08-09 21:07.58 ---> using "9cdc204b83bd358da6594149fb9cbb1be15cd7e7eaf32c6fc33ffd29250b28f4" 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 21:07.58 ---> using "f7bb481ec0472e7e9264589bf682e9eea56ac0ed9e718050ede22ca827a1d0dd" from cache

/src: (run (network host)
           (shell "echo '(lang dune 3.0)' > './dune-project'"))
2025-08-09 21:07.58 ---> using "6a98567411dff8a774517163613a81609a2f1630c7ac07d7f30448c0cea1e751" 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 "apk" "update"
- fetch https://dl-cdn.alpinelinux.org/alpine/v3.21/main/x86_64/APKINDEX.tar.gz
- fetch https://dl-cdn.alpinelinux.org/alpine/v3.21/community/x86_64/APKINDEX.tar.gz
- fetch https://dl-cdn.alpinelinux.org/alpine/edge/main/x86_64/APKINDEX.tar.gz
- fetch https://dl-cdn.alpinelinux.org/alpine/edge/community/x86_64/APKINDEX.tar.gz
- fetch https://dl-cdn.alpinelinux.org/alpine/edge/testing/x86_64/APKINDEX.tar.gz
- v3.21.4-39-g69873deaff7 [https://dl-cdn.alpinelinux.org/alpine/v3.21/main]
- v3.21.4-39-g69873deaff7 [https://dl-cdn.alpinelinux.org/alpine/v3.21/community]
- v3.23.0_alpha20250612-4066-gfb83d875700 [https://dl-cdn.alpinelinux.org/alpine/edge/main]
- v3.23.0_alpha20250612-4075-g544b0c9e81e [https://dl-cdn.alpinelinux.org/alpine/edge/community]
- v3.23.0_alpha20250612-4071-gd37fc9b1080 [https://dl-cdn.alpinelinux.org/alpine/edge/testing]
- OK: 59263 distinct packages available

<><> 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:
    curl-dev libffi-dev zlib-dev

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

+ /usr/bin/sudo "apk" "add" "curl-dev" "libffi-dev" "zlib-dev"
- (1/13) Installing brotli (1.1.0-r2)
- (2/13) Installing brotli-dev (1.1.0-r2)
- (3/13) Installing c-ares-dev (1.34.5-r0)
- (4/13) Installing libidn2-dev (2.3.7-r0)
- (5/13) Installing libpsl-utils (0.21.5-r3)
- (6/13) Installing libpsl-dev (0.21.5-r3)
- (7/13) Installing nghttp2-dev (1.64.0-r0)
- (8/13) Installing openssl-dev (3.3.4-r0)
- (9/13) Installing zlib-dev (1.3.1-r2)
- (10/13) Installing zstd-dev (1.5.6-r2)
- (11/13) Installing curl-dev (8.12.1-r1)
- (12/13) Installing linux-headers (6.6-r1)
- (13/13) Installing libffi-dev (3.4.7-r0)
- Executing busybox-1.37.0-r12.trigger
- OK: 317 MiB in 115 packages
2025-08-09 21:07.58 ---> using "9d7d8eb81444ebec2d2e99c78dea43c55ca47e922b0a907e934982b627fa6cae" 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 num.1.6  (cached)
-> retrieved mdx.2.5.0  (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 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 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 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)
-> retrieved ppx_here.v0.17.0  (cached)
-> retrieved ppx_inline_test.v0.17.1  (cached)
-> retrieved ppx_optcomp.v0.17.1  (cached)
-> installed cmdliner.1.3.0
-> installed num.1.6
-> installed ocamlbuild.0.16.1
-> retrieved ppx_minidebug.2.3.0  (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 sexplib.v0.17.0  (cached)
-> retrieved sexplib0.v0.17.0  (cached)
-> retrieved ppxlib.0.36.0  (cached)
-> retrieved stdio.v0.17.0  (cached)
-> retrieved stdlib-shims.0.3.0  (cached)
-> retrieved thread-local-storage.0.2  (cached)
-> retrieved time_now.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 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 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 dyn.3.19.1
-> installed tyxml.4.6.0
-> installed sexplib.v0.17.0
-> installed angstrom.0.16.1
-> installed printbox-html.0.12
-> installed curl.0.10.0
-> installed uucp.16.0.0
-> installed printbox-text.0.12
-> installed ctypes.0.23.0
-> installed stdune.3.19.1
-> installed printbox-md.0.12
-> installed base.v0.17.3
-> installed printbox-ext-plot.0.12
-> installed ctypes-foreign.0.23.0
-> installed fieldslib.v0.17.0
-> installed variantslib.v0.17.0
-> installed stdio.v0.17.0
-> installed dune-private-libs.3.19.1
-> installed dune-site.3.19.1
-> installed ppxlib.0.36.0
-> installed ppxlib_jane.v0.17.4
-> installed ppx_optcomp.v0.17.1
-> installed ppx_here.v0.17.0
-> installed ppx_cold.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 21:07.58 ---> using "b1e3a6d419f515cf17518708ebd9d23d7be89ade192ced2b98f331e812fef9c1" from cache

/src: (copy (src .) (dst /src))
2025-08-09 21:07.58 ---> saved as "1413af562c3642b98a582a663f894cf93711912d06465599f087376510f0fd25"

/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 && ./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 && ./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
Failed to delete directory log_files: (Sys_error "log_files/micrograd_demo_logging.log: No such file or directory")
(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/48145f50dbc6da920f2b9d8bb8cdd11a/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/48145f50dbc6da920f2b9d8bb8cdd11a/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/08e8eca8598ad4158002496405a0de04/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/08e8eca8598ad4158002496405a0de04/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/48145f50dbc6da920f2b9d8bb8cdd11a/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/48145f50dbc6da920f2b9d8bb8cdd11a/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/48145f50dbc6da920f2b9d8bb8cdd11a/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/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..d9699d7 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│-                                                                                                   │
-│     │                                                                                                    │
+│ 3.65│-                                                                                                   │
 │     │                                                                                                    │
 │     │                                                                                                    │
 │     │                                                                                                    │
@@ -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 │-                                                                                                   │
+│ 1.29    │-                                                                                                   │
 │         │                                                                                                    │
 │         │ -                                                                                                  │
 │         │  -                                                                                                 │
+│         │   -                                                                                                │
+│         │     -                                                                                              │
 │         │                                                                                                    │
-│         │   - -                                                                                              │
-│         │       -    -                                                                                       │
-│         │      -        --   -                                                                               │
-│         │        -  -                                                                                        │
-│         │          -       -   --           --                                                               │
-│         │             -                                                                                      │
-│         │                                 -                                                                  │
-│         │                                               -     -                                 -            │
-│         │                                                                                  -                 │
-│         │                     -                                 -          -    -              -          -  │
-│         │                 -                       -      -                -         -                        │
-│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                                                │
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..93bac96 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 │     │
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-││      │ 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 │     │
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-││      │ 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 │     │
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-││      │ 2.00  3.00  4.00 │     │
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-││      │ 2.00  4.00  4.00 │     │
-││      │ 2.00  4.00  5.00 │     │
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-├────────────────────────────────┤
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-││3 @ 0 │axis 3            │     │
-│├──────┼──────────────────┤     │
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-││      │ 3.00  0.00  5.00 │     │
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-││      │ 3.00  2.00  4.00 │     │
-││      │ 3.00  2.00  5.00 │     │
-│├──────┼──────────────────┤     │
-││3 @ 1 │ 3.00  3.00  0.00 │     │
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-││      │ 3.00  4.00  5.00 │     │
-│└──────┴──────────────────┘     │
-└────────────────────────────────┘
+┌─────────────────────────────────────────────┐
+│[9]: ;=>+ shape 0:4,1:5,2:6,3:3  includes NaN│
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+││0 @ 0 │axis 3                    │          │
+│├──────┼──────────────────────────┤          │
+││0 @ 1 │ -nan      6.00      0.00 │          │
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+│├──────┼──────────────────────────┤          │
+││1 @ 1 │ -nan      7.00  0.00     │          │
+││axis 2│ 9.14e-41  -nan  1.00     │          │
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+││      │ 1.25e-14  1.00  4.00     │          │
+││      │ 0.00      1.00  5.00     │          │
+│├──────┼──────────────────────────┤          │
+││2 @ 1 │ -nan      8.00  0.00     │          │
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+││      │ 1.25e-14  2.00  4.00     │          │
+││      │ 0.00      2.00  5.00     │          │
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+││3 @ 1 │ -nan      9.00  0.00     │          │
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+││      │ 1.25e-14  3.00  4.00     │          │
+││      │ 0.00      3.00  5.00     │          │
+│├──────┼──────────────────────────┤          │
+││4 @ 1 │ -nan      1.00e+1  0.00  │          │
+││axis 2│ 9.14e-41  -nan     1.00  │          │
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+├─────────────────────────────────────────────┤
+│┌──────┬──────────────────────┐              │
+││1 @ 0 │axis 3                │              │
+│├──────┼──────────────────────┤              │
+││0 @ 1 │ -nan  6.00      0.00 │              │
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+││      │ 1.00  1.00  5.00     │              │
+│├──────┼──────────────────────┤              │
+││2 @ 1 │ -nan  8.00  0.00     │              │
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+││3 @ 1 │ -nan  9.00  0.00     │              │
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+││      │ 1.00  3.00  5.00     │              │
+│├──────┼──────────────────────┤              │
+││4 @ 1 │ -nan  1.00e+1  0.00  │              │
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+││      │ 1.00  4.00     4.00  │              │
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+│└──────┴──────────────────────┘              │
+├─────────────────────────────────────────────┤
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+││2 @ 0 │axis 3                │              │
+│├──────┼──────────────────────┤              │
+││0 @ 1 │ -nan  6.00      0.00 │              │
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+││2 @ 1 │ -nan  8.00  0.00     │              │
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+││      │ 2.00  3.00  5.00     │              │
+│├──────┼──────────────────────┤              │
+││4 @ 1 │ -nan  1.00e+1  0.00  │              │
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+││      │ 2.00  4.00     5.00  │              │
+│└──────┴──────────────────────┘              │
+├─────────────────────────────────────────────┤
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+││3 @ 0 │axis 3                │              │
+│├──────┼──────────────────────┤              │
+││0 @ 1 │ -nan  6.00      0.00 │              │
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+│├──────┼──────────────────────┤              │
+││1 @ 1 │ -nan  7.00  0.00     │              │
+││axis 2│ 3.00  -nan  1.00     │              │
+││      │ ...   ...   ...      │              │
+││      │ 3.00  1.00  4.00     │              │
+││      │ 3.00  1.00  5.00     │              │
+│├──────┼──────────────────────┤              │
+││2 @ 1 │ -nan  8.00  0.00     │              │
+││axis 2│ 3.00  -nan  1.00     │              │
+││      │ ...   ...   ...      │              │
+││      │ 3.00  2.00  4.00     │              │
+││      │ 3.00  2.00  5.00     │              │
+│├──────┼──────────────────────┤              │
+││3 @ 1 │ -nan  9.00  0.00     │              │
+││axis 2│ 3.00  -nan  1.00     │              │
+││      │ ...   ...   ...      │              │
+││      │ 3.00  3.00  4.00     │              │
+││      │ 3.00  3.00  5.00     │              │
+│├──────┼──────────────────────┤              │
+││4 @ 1 │ -nan  1.00e+1  0.00  │              │
+││axis 2│ 3.00  -nan     1.00  │              │
+││      │ ...   ...      ...   │              │
+││      │ 3.00  4.00     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  includes NaN│
+│┌──────┬──────────────────────────┐   │
+││      │axis 1                    │   │
+│├──────┼──────────────────────────┤   │
+││axis 0│ -nan      6.00      0.00 │   │
+││      │ 9.14e-41  -nan      1.00 │   │
+││      │ ...       ...       ...  │   │
+││      │ 1.25e-14  3.13e-41  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                                     │
(cd _build/.sandbox/48145f50dbc6da920f2b9d8bb8cdd11a/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/48145f50dbc6da920f2b9d8bb8cdd11a/default/test/operations/zero2hero_1of7.ml.corrected
diff --git a/_build/default/test/operations/zero2hero_1of7.ml b/_build/.sandbox/48145f50dbc6da920f2b9d8bb8cdd11a/default/test/operations/zero2hero_1of7.ml.corrected
index 5caa1d9..978bba6 100644
--- a/_build/default/test/operations/zero2hero_1of7.ml
+++ b/_build/.sandbox/48145f50dbc6da920f2b9d8bb8cdd11a/default/test/operations/zero2hero_1of7.ml.corrected
@@ -273,21 +273,21 @@ let%expect_test "Simple gradients hosted" =
   [%expect
     {|
                        #12 *._l
-                        0.00
+                        1.66e+19
                        #13 grad_*._l
-                        0.00
+                        2.50e+1
                  #8 +_d                   │#10 f non-emb
-                  0.00                    │ -2.00
+                  7.50e+1                 │ -2.00
                  #9 grad_+_d              │#11 grad_f
-                  0.00                    │ 0.00
+                  6.00e+1                 │ 2.00e+1
           #4 *._e            │#6 c non-emb│
-           0.00              │ 1.00e+1    │
+           1.66e+19          │ 1.00e+1    │
           #5 grad_*._e       │#7 grad_c   │
-           0.00              │ 0.00       │
+           1.66e+19          │ 2.50e+1    │
     #0 a non-emb│#2 b non-emb│            │
      2.00       │ -3.00      │            │
     #1 grad_a   │#3 grad_b   │            │
-     0.00       │ 0.00       │            │
+     1.66e+19   │ 1.66e+19   │            │
     |}];
   (* 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
+                    -2.60
                    #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>                       │ 6.24
       #4 *._e Virt/152       │#6 c non-emb│
       <void>                 │ 1.00e+1    │
       #5 grad_*._e Virt/40   │#7 grad_c   │
-      <void>                 │ 0.00       │
+      <void>                 │ 1.66e+19   │
     #0 a non-emb│#2 b non-emb│            │
      2.00       │ -3.00      │            │
     #1 grad_a   │#3 grad_b   │            │
-     0.00       │ 0.00       │            │
+     6.56       │ 6.24       │            │
     |}];
   (* Do not update the params: all values and gradients will be at initial points, which are
      specified in the tensor in the brackets. *)
(cd _build/.sandbox/08e8eca8598ad4158002496405a0de04/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/08e8eca8598ad4158002496405a0de04/default/test/einsum/einsum_trivia.ml.corrected
diff --git a/_build/default/test/einsum/einsum_trivia.ml b/_build/.sandbox/08e8eca8598ad4158002496405a0de04/default/test/einsum/einsum_trivia.ml.corrected
index 2bcae70..eaee550 100644
--- a/_build/default/test/einsum/einsum_trivia.ml
+++ b/_build/.sandbox/08e8eca8598ad4158002496405a0de04/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 │ 5.88e-44  0.00      0.00 ││
+    ││axis 2│ 0.00      0.00      1.00 ││
+    ││      │ ...       ...       ...  ││
+    ││      │ 1.89e-2   4.18e-41  4.00 ││
+    ││      │ 4.18e-41  2.80e-45  5.00 ││
+    │├──────┼──────────────────────────┤│
+    ││1 @ 1 │ 5.88e-44  1.00  0.00     ││
+    ││axis 2│ 0.00      1.00  1.00     ││
+    ││      │ ...       ...   ...      ││
+    ││      │ 1.89e-2   1.00  4.00     ││
+    ││      │ 4.18e-41  1.00  5.00     ││
+    │├──────┼──────────────────────────┤│
+    ││2 @ 1 │ 5.88e-44  2.00  0.00     ││
+    ││axis 2│ 0.00      2.00  1.00     ││
+    ││      │ ...       ...   ...      ││
+    ││      │ 1.89e-2   2.00  4.00     ││
+    ││      │ 4.18e-41  2.00  5.00     ││
+    │├──────┼──────────────────────────┤│
+    ││3 @ 1 │ 5.88e-44  3.00  0.00     ││
+    ││axis 2│ 0.00      3.00  1.00     ││
+    ││      │ ...       ...   ...      ││
+    ││      │ 1.89e-2   3.00  4.00     ││
+    ││      │ 4.18e-41  3.00  5.00     ││
+    │├──────┼──────────────────────────┤│
+    ││4 @ 1 │ 5.88e-44  4.00  0.00     ││
+    ││axis 2│ 0.00      4.00  1.00     ││
+    ││      │ ...       ...   ...      ││
+    ││      │ 1.89e-2   4.00  4.00     ││
+    ││      │ 4.18e-41  4.00  5.00     ││
+    │└──────┴──────────────────────────┘│
+    ├───────────────────────────────────┤
+    │┌──────┬──────────────────────┐    │
+    ││1 @ 0 │axis 3                │    │
+    │├──────┼──────────────────────┤    │
+    ││0 @ 1 │ 1.00  0.00      0.00 │    │
+    ││axis 2│ 1.00  0.00      1.00 │    │
+    ││      │ ...   ...       ...  │    │
+    ││      │ 1.01  4.18e-41  4.00 │    │
+    ││      │ 1.00  2.80e-45  5.00 │    │
+    │├──────┼──────────────────────┤    │
+    ││1 @ 1 │ 1.00  1.00  0.00     │    │
+    ││axis 2│ 1.00  1.00  1.00     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 1.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 1.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 1.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 1.01  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 │    │
+    ││      │ ...   ...       ...  │    │
+    ││      │ 2.01  4.18e-41  4.00 │    │
+    ││      │ 2.00  2.80e-45  5.00 │    │
+    │├──────┼──────────────────────┤    │
+    ││1 @ 1 │ 2.00  1.00  0.00     │    │
+    ││axis 2│ 2.00  1.00  1.00     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 2.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 2.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 2.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 2.01  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 │    │
+    ││      │ ...   ...       ...  │    │
+    ││      │ 3.01  4.18e-41  4.00 │    │
+    ││      │ 3.00  2.80e-45  5.00 │    │
+    │├──────┼──────────────────────┤    │
+    ││1 @ 1 │ 3.00  1.00  0.00     │    │
+    ││axis 2│ 3.00  1.00  1.00     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 3.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 3.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 3.01  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     │    │
+    ││      │ ...   ...   ...      │    │
+    ││      │ 3.01  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│ 5.88e-44  0.00      0.00 ││
+    ││      │ 0.00      0.00      1.00 ││
+    ││      │ ...       ...       ...  ││
+    ││      │ 1.89e-2   4.18e-41  4.00 ││
+    ││      │ 4.18e-41  2.80e-45  5.00 ││
+    │└──────┴──────────────────────────┘│
+    └───────────────────────────────────┘
     |}]
 
 let%expect_test "einsum with a leftmost input axis preserved as output axis" =
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..1e27e1d 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=2.360010
                                                                                                                                       #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                                                                                                                                             │
+                                                                                                                                 2.42                                                                                                                                             │
                                                                                                                                  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                                                                                                                                         │
+                                                                                                                                    -2.42                                                                                                                                         │
                                                                                                                                     -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                                                                                                                                             │
+                                                                                                                              8.81e-2                                                                                                                                             │
+                                                                                                                              7.15e-2                                                                                                                                             │
                                                                                                                               ...                                                                                                                                                 │
-                                                                                                                              1.72e-2                                                                                                                                             │
+                                                                                                                              1.68e-2                                                                                                                                             │
                                                                                                                               2.72e-2                                                                                                                                             │
                                                                                                                              #30 grad_=>_output_probs                                                                                                                             │
-                                                                                                                              -1.17e-2                                                                                                                                            │
-                                                                                                                              -1.40e-2                                                                                                                                            │
+                                                                                                                              -1.13e-2                                                                                                                                            │
+                                                                                                                              -1.39e-2                                                                                                                                            │
                                                                                                                               ...                                                                                                                                                 │
-                                                                                                                              -5.78e-2                                                                                                                                            │
-                                                                                                                              -3.66e-2                                                                                                                                            │
+                                                                                                                              -5.93e-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                                                                                                                    │
+                                                                                                                   -1.13e-2  -1.13e-2  ...  -1.13e-2  -1.13e-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                                                                                                                    │
+                                                                                                                   -5.93e-2  -5.93e-2  ...  -5.93e-2  -5.93e-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                                                 │
+                                                      4.44e-2  2.52e-2  ...  2.58e-2  7.29e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
+                                                      1.10e-1  2.02e-2  ...  2.10e-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  ...  6.62e-2  1.24e-2                                                       │                                                 0.00  0.00  ...  0.00  0.00                                                 │
+                                                      2.72e-2  3.02e-2  ...  3.37e-2  4.85e-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                                                               │                                                                                                                             │
+                │                                                             1.29e+2                                                               │                                                                                                                             │
                 │                                                             1.55e+2                                                               │                                                                                                                             │
                 │                                                             ...                                                                   │                                                                                                                             │
-                │                                                             2.13e+2                                                               │                                                                                                                             │
-                │                                                             1.26e+2                                                               │                                                                                                                             │
+                │                                                             2.19e+2                                                               │                                                                                                                             │
+                │                                                             1.27e+2                                                               │                                                                                                                             │
                 │                                                            #19 grad_=>                                                            │                                                                                                                             │
-                │                                                             7.76e-6                                                               │                                                                                                                             │
-                │                                                             6.44e-6                                                               │                                                                                                                             │
+                │                                                             7.74e-6                                                               │                                                                                                                             │
+                │                                                             6.43e-6                                                               │                                                                                                                             │
                 │                                                             ...                                                                   │                                                                                                                             │
-                │                                                             4.67e-6                                                               │                                                                                                                             │
-                │                                                             7.87e-6                                                               │                                                                                                                             │
+                │                                                             4.55e-6                                                               │                                                                                                                             │
+                │                                                             7.86e-6                                                               │                                                                                                                             │
                 │                                            #16 exp_counts                                                                         │                                                                                                                             │
-                │                                             5.77     3.24  ...  3.36     9.05                                                     │                                                                                                                             │
-                │                                             1.68e+1  3.16  ...  3.32     3.50                                                     │                                                                                                                             │
+                │                                             5.74     3.26  ...  3.33     9.40                                                     │                                                                                                                             │
+                │                                             1.72e+1  3.15  ...  3.27     3.47                                                     │                                                                                                                             │
                 │                                             ...      ...   ...  ...      ...                                                      │                                                                                                                             │
-                │                                             4.59     2.28  ...  1.37e+1  2.72                                                     │                                                                                                                             │
-                │                                             3.46     3.86  ...  4.23     6.20                                                     │                                                                                                                             │
+                │                                             4.60     2.26  ...  1.45e+1  2.73                                                     │                                                                                                                             │
+                │                                             3.46     3.85  ...  4.29     6.16                                                     │                                                                                                                             │
                 │                                            #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                                              │                                                                                                                             │
+                │                                             7.74e-6   7.74e-6  ...  7.74e-6  7.74e-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                                              │                                                                                                                             │
+                │                                             4.55e-6   4.55e-6  ...  4.55e-6  4.55e-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                                                                                                    │                                                                                                                             │
+                │ 1.74  1.18     ...  1.20  2.24                                                                                                    │                                                                                                                             │
+                │ 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  8.15e-1  ...  2.67  1.00                                                                                                    │                                                                                                                             │
+                │ 1.24  1.34     ...  1.45  1.81                                                                                                    │                                                                                                                             │
                 │#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                                                                                          │                                                                                                                             │
+                │ 4.44e-5   2.52e-5  ...  2.58e-5  7.29e-5                                                                                          │                                                                                                                             │
+                │ 1.10e-4   2.02e-5  ...  2.10e-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  ...  6.62e-5  1.24e-5                                                                                          │                                                                                                                             │
+                │ -9.72e-4  3.02e-5  ...  3.37e-5  4.85e-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                                                                                                  │                                                                                                                             │
+                ││  1.03  1.42  ...  1.13     8.15e-1                                                                                               │                                                                                                                             │
+                ││  ...   ...   ...  ...      ...                                                                                                   │                                                                                                                             │
+                ││  4.87  1.54  ...  8.87e-1  2.67                                                                                                  │                                                                                                                             │
+                ││  5.26  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  ...  -2.72e-3  -4.87e-4                                                                                         │                                                                                                                             │
+                ││  8.94e-4   0.00  ...  1.47e-3   7.41e-4                                                                                          │                                                                                                                             │
                 ││  ...       ...   ...  ...       ...                                                                                              │                                                                                                                             │
-                ││  -3.60e-3  0.00  ...  1.19e-3   -3.36e-3                                                                                         │                                                                                                                             │
-                ││  -3.33e-3  0.00  ...  3.95e-4   -8.07e-5                                                                                         │                                                                                                                             │
+                ││  -3.24e-3  0.00  ...  1.15e-3   -3.23e-3                                                                                         │                                                                                                                             │
+                ││  -3.07e-3  0.00  ...  3.66e-4   -1.01e-4                                                                                         │                                                                                                                             │
                 ││ ├─[#9 w]                                                                                                                         │                                                                                                                             │
                 ││ └─#11 1 Virt/40                                                                                                                  │                                                                                                                             │
                 ││   <void>                                                                                                                         │                                                                                                                             │
@@ -145,23 +145,23 @@ 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
+zaqyfdhawgzhehispoj
+zauzvubjimvreefzaerrreeimnaeibbbuzaann
+zaxsxdcyr
 zaaxxn
 ydqy
 viroh
 zwi
 zltixfmykyr
-vhaorbxuvi
+viaorbxuvi
 yunm
 zxcx
 v
 zashaouucniri
-fel
-vuosmuqyuzqkoar
-zispufkphxooin
+gdjgcvismuqyuzqkoar
+ziror
+yofxooin
 zan
-vcripzakyojchafikvi
+vcripzakyojchaghere
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 3d5e347..71d7beb 100644
--- a/_build/default/test/training/moons_demo.expected
+++ b/_build/default/test/training/moons_demo.exe.output
@@ -2,38 +2,38 @@ Retrieving commandline, environment, or config file variable ocannl_log_level
 Found 0, in the config file
 Half-moons scatterplot and decision boundary:
 ┌────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│************************************#*********************************************..................│
-│*****************************##*#*#***###**#*************************************...................│
-│*********************##**#*#*###***#*##*#**#*##*********************************....................│
-│*******************####*##########***#####**####*******************************.....................│
-│**************#**###**#**#*#*#*###*#*#**#*#####*****##************************......................│
-│***************#####*#*##****##**####*####**#**#*#*#*************************.......................│
-│*************#*###*#*#*#*******************#*#*#########*********************.......................│
-│*********#**##*#*#*#**************************####*###*#********************........................│
-│********#****###*#*******************************#**#*#*##*#****************........................│
-│******#*#*#*#####************************************#####******************........................│
-│************###**************************************#*#********************........................│
-│********###**#**************........*******************###*##**************.........................│
-│******####*###***********.............********************###**#***********.........................│
-│*****###*##*#**********...........%%....****************#*##*#*************....................%....│
-│****#*#####***********.........%....%.....****************####**#**********....................%....│
-│****##*#*#**********...........%%%%........****************##*************...................%%.%%..│
-│***####*#**********..............%..%........***************####**********...................%..%.%.│
-│**##*#**#*********..............%.%%...........************###**##********...................%..%..%│
-│*##*#*##*********..............%.%%.%...........**********#**##**#********...................%.%..%.│
-│***####*********...............%%.%%.%............***********#####*#*****....................%....%.│
-│*##*##*#******..................%...%...............********##*#*#*******..................%.%%%.%..│
-│#**#**#******..................%%%.%%................*********#*###******...................%....%..│
-│####********.......................%.%.%...............******##*##*******..................%%%%%....│
-│#***##*****......................%%.%%..%................****#####*#****...................%%%%.%...│
-│##*#******........................%%%.%.%.................********##****.................%..%%%.....│
-│#*#******..........................%%.%.....................***#**##****..................%.%.%%%...│
-│#**#***.............................%%%%%..%..................***#******.................%%%........│
-│##****............................%...%.%%%...................##***#***................%%%.%..%.....│
-│*****...............................%.%%%%........................*****..............%..%.%%.%......│
-│****.................................%%.%%%%.............................................%%.%%......│
-│***....................................%..%..%.....................................%%%%.%%%%%.......│
-│*........................................%.%%.%%..%...............................%%%%%%.%.%........│
+│************************************#***************************************************************│
+│*****************************##*#*#***###**#********************************************************│
+│*********************##**#*#*###***#*##*#**#*##****************************************************.│
+│*******************####*##########***#####**####**************************************************..│
+│**************#**###**#**#*#*#*###*#*#**#*#####*****##******************************************....│
+│***************#####*#*##****##**####*####**#**#*#*#*******************************************.....│
+│*************#*###*#*#*#*******************#*#*#########**************************************......│
+│*********#**##*#*#*#**************************####*###*#*************************************.......│
+│********#****###*#*******************************#**#*#*##*#********************************........│
+│******#*#*#*#####****************...*****************#####**********************************........│
+│************###****************......****************#*#***********************************.........│
+│********###**#***************..........****************###*##*****************************..........│
+│******####*###**************............******************###**#*************************...........│
+│*****###*##*#*************........%%.....***************#*##*#**************************.......%....│
+│****#*#####**************......%....%......***************####**#**********************........%....│
+│****##*#*#*************........%%%%.........***************##*************************.......%%.%%..│
+│***####*#*************...........%..%........***************####*********************........%..%.%.│
+│**##*#**#***********............%.%%...........************###**##******************.........%..%..%│
+│*##*#*##***********............%.%%.%...........**********#**##**#*****************..........%.%..%.│
+│***####**********..............%%.%%.%...........************#####*#**************...........%....%.│
+│*##*##*#********................%...%..............*********##*#*#***************..........%.%%%.%..│
+│#**#**#*******.................%%%.%%...............**********#*###*************............%....%..│
+│####*********......................%.%.%.............********##*##*************............%%%%%....│
+│#***##*****......................%%.%%..%..............******#####*#**********.............%%%%.%...│
+│##*#******........................%%%.%.%...............**********##*********............%..%%%.....│
+│#*#*****...........................%%.%...................*****#**##********..............%.%.%%%...│
+│#**#***.............................%%%%%..%...............******#*********..............%%%........│
+│##***.............................%...%.%%%.................**##***#******.............%%%.%..%.....│
+│****................................%.%%%%....................***********............%..%.%%.%......│
+│***..................................%%.%%%%...................*********.................%%.%%......│
+│*......................................%..%..%.....................****............%%%%.%%%%%.......│
+│.........................................%.%%.%%..%...............................%%%%%%.%.%........│
 │........................................%%.%%.%%%................................%%.%.%...%.........│
 │.............................................%%%.............................%.%.%..%%..%...........│
 │.............................................%.%%.%%%%%..................%%%.%%.%.%..%..............│
@@ -44,7 +44,7 @@ Half-moons scatterplot and decision boundary:
 │.....................................................%....%..%.%%%%%................................│
 └────────────────────────────────────────────────────────────────────────────────────────────────────┘Loss:
 ┌────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│ 2.38e+1│-                                                                                                   │
+│ 2.92e+1│-                                                                                                   │
 │        │                                                                                                    │
 │        │                                                                                                    │
 │        │                                                                                                    │
@@ -70,7 +70,6 @@ Half-moons scatterplot and decision boundary:
 │        │                                                                                                    │
 │        │                                                                                                    │
 │        │                                                                                                    │
-│        │-                                                                                                   │
 │        │                                                                                                    │
 │        │                                                                                                    │
 │        │                                                                                                    │
@@ -78,56 +77,57 @@ Half-moons scatterplot and decision boundary:
 │        │                                                                                                    │
 │        │                                                                                                    │
 │        │-                                                                                                   │
-│        │   -                                                                                                │
-│        │ -    - -  - - -- -                 -        -                                                      │
-│        │     -    -         -  - -         -- - -- -  -    -                                                │
-│        │-- - -- - -    -- - -- -  - - -- - -- -         - -  - -- - -- - -- -  -   -                        │
-│        │---- -- - -- - ---- -- - ---- -- - -- - -- - --    -                  -  -  - - -- - --   -         │
+│        │                                                                                                    │
+│        │ -                                                                                                  │
+│        │-  -  -                                                                                             │
+│        │     -    -                                                                                         │
+│        │-     - -  - - -- -  - - -                                                                          │
+│        │---- -- - -- -      -     - - -- - -- - --   -  -  -   -  -         -                               │
 │ 0.00   │----------------------------------------------------------------------------------------------------│
 ├────────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
 │        │0.00                                                                                         4.79e+3│
 │        │                                                step                                                │
 └────────┴────────────────────────────────────────────────────────────────────────────────────────────────────┘Log-loss, for better visibility:
 ┌─────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
-│ 3.17    │-                                                                                                   │
+│ 3.37    │                                                                                                    │
+│         │-                                                                                                   │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │                                                                                                    │
 │         │-                                                                                                   │
+│         │ -                                                                                                  │
+│         │-  -  -                                                                                             │
+│         │     -  - -- - --                                                                                   │
+│         │-    -- -         -  - - --    -                                                                    │
+│         │ --- -- - --        -       - -  - -- -  -   -  -                   -                               │
+│         │-- - -- - -  -                          -  -  -    -   -  -                                         │
+│         │- -- ---- --   --                                 -  -                                              │
+│         │-  - ---- -       - -                                                                               │
+│         │-  -  - - -- - -                                        -        --   -                             │
+│         │-       -         -  -                                      -                                       │
+│l        │ -  - --   -   -     -   -          -             -                         -                       │
+│o        │----    --   -         -                     -               - -     -        -                     │
+│g        │--    -   --  - -      ----                                            -                            │
+│         │-  -  --- -   --      -      -      -      -   -      -            -     -                          │
+│l        │-  -  -  -- ----   -           -  --  -  --              -                                          │
+│o        │ -  -   ----- -  -       ---     -  -       - --          -     -  -         -  -                   │
+│s        │--  - -     -- -    - -   --  ---  - - --            -            -        -                        │
+│s        │ - --   - ----     - --        -- - -     -    ---            -  -    -                             │
+│         │--  -  ---    -- -  - - -    - -       --           - -    --         -     -                       │
+│         │   -    --      -  -    -     -          -     -       -   -    -        -                          │
+│         │ -         - -  -   --             ---    -  -  --  -  --             -   -                         │
+│         │           -  ---  -   - -     -     -                                         -                    │
+│         │- -   -   - -    -  --          -                   -      -                                        │
+│         │       - -  -              -         -                                           -                  │
+│         │                    -     - -       -  -           -   -         -    -                             │
+│         │                   -               -    -                -                                          │
+│         │          -                   -                                                                     │
+│         │           -  -                             -                                                       │
+│         │                                   -                                                                │
+│         │                                                                                                    │
 │         │                                                                                                    │
-│         │-  -                                                                                                │
-│         │ -   -- - -- - -- - -               -        --                                                     │
-│         │      -           -  - - -- -  -   -- - -- -    - -- -  -    -                                      │
-│         │-- - -- - -- - ---  -  - -- - -- - -- -                -  - -  - -- -  -   -                        │
-│         │---- -- - -- - ---- -- - ---- -- - -- - --   --                       -  -       -    -             │
-│         │-  - -- - -- - -    -    -  - -  - --      -       - -                      - - -  - -  - -         │
-│         │- -  -- -    -   --  ---   --  - - -  - --   -  - -                                          -      │
-│         │- --  -      -   -                  - -  -   -         -- -  -                             -      - │
-│         │-  - -    --        --           - -- - --      -    - -    -    -  -                          --   │
-│         │     --   --      -   --      -     -         -   --    - -  -   -  -                               │
-│l        │-  -    -      -    --   - --   --      -  - -                    -        -             -       -  │
-│o        │ -   ---   - -         -      - -  -  -  - -         -      -             -          -              │
-│g        │ -  - -- -    -          -         --    -  -   -  -              -    -         --    -    -       │
-│         │- --    -    -  -   ---    -     -------- - - --                  --           -    -          -    │
-│l        │--    -- - -          -     -  -- -- --- -- -     - - -    -  - -  -  -   --                  -    -│
-│o        │--  - --  ----        -     - --    -- -- -  --   ---- - - -         -              -               │
-│s        │--    --   -    -     -          -- -- --   -  - ---     -   - -   -         --           --        │
-│s        │ -- - --   -         ---    --    ------ --     --    -- -    -             --               -      │
-│         │        -  -     -   --   -  -   - - - --    --   -   ---  --           -        - - -    -         │
-│         │-  - ---      -      -       -   ---    -    - - - -   --  -    -       -    -  -             -  -  │
-│         │       - - -          -     -    --  ---   - -  -  -   -  -       - -   -       -   -               │
-│         │-  -                           - -   - -    -     -         -  -                          -         │
-│         │-                         -     --    - - - -  -    -        -       -   -        -                 │
-│         │                               - -   -  -      -    -         -- -              -     -             │
-│         │-   -                --          -      - --   -               -                                    │
-│         │       -                  -   -    - --     -            -               -                          │
-│         │                                  -     -        -               -         -                        │
-│         │                                -         -           -      -                 -              -     │
-│         │                                                 -                                                  │
-│         │      -                                                                                             │
-│         │                                                      -                                             │
-│         │                                                                -                                   │
 │         │                                                                                                    │
+│         │   -                                                                                                │
 │ -1.00e+1│----------------------------------------------------------------------------------------------------│
 ├─────────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
 │         │0.00                                                                                         4.79e+3│
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..d0972f6 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:
+┌─────────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│ 8.09    │-                                                                                                   │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │-                                                                                                   │
+│         │                                                                                                    │
+│         │-                                                                                                   │
+│         │-- - -- - -- - -- - -- - -    -         --   -       -         -                 -                  │
+│         │-- - -- - -- - --   -  -  - -  - - -- -    -  -   --         -              -                       │
+│         │---- ---- ---- ---- -- - -- - -- - -  - --   -  -    - -- - -  - -- -    -      -                 - │
+│         │----      - -  -    -    -- -  - - --    -   -                        --   -  -  - - -  - -         │
+│         │ --  - -- --  -  -    -   -             -  -      --                                  -    - -  -   │
+│         │       --    --        -      -  - -  -       - -    -         -   -    -        -                  │
+│         │  -- -      -- -   -- --    --- --       -           -     --- -               -     -              │
+│b        │  -    - - --   ---    - - - --  -         -        --              -     ----            - - --    │
+│a        │   -    -     -             -       ------  --         - --    -                                 -  │
+│t        │                                   -         - - -         -         --     -            -        --│
+│c        │   -       -        - --                 -       -               --                    -           -│
+│h        │                         -   -      - -          -                                                  │
+│         │               -                -                 -         -                       -               │
+│l        │  -      -                     -                -                                              -    │
+│o        │ -                                -                                                                 │
+│g        │                                                                                                    │
+│         │                           -                                                                        │
+│l        │                     -                                                                              │
+│o        │                                              -                                                     │
+│s        │                                                                                                    │
+│s        │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│         │                                                                                                    │
+│ -1.04e+1│ ---------------------------------------------------------------------------------------------------│
+├─────────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│         │0.00                                                                                         1.19e+3│
+│         │                                                step                                                │
+└─────────┴────────────────────────────────────────────────────────────────────────────────────────────────────┘
+Epoch Log-loss:
+┌─────┬────────────────────────────────────────────────────────────────────────────────────────────────────┐
+│ 8.70│-                                                                                                   │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                  
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │ -                                                                                                  │
+│     │   -                                                                                                │
+│e    │     --    -   --                                                                                   │
+│p    │        - -  -    - -- -                                                                            │
+│o    │                         -       -                                                                  │
+│c    │                              -          -                                                          │
+│h    │                          - -  -   -         -                 -                                    │
+│     │                                        -            -                           -                  │
+│l    │                                      -                                                             │
+│o    │                                    -                                                               │
+│g    │                                           -      --         -                                      │
+│     │                                              -                             -                       │
+│l    │                                                -           -                                       │
+│o    │                                                       -- -       -                                 │
+│s    │                                                                 -  -  -        -                 - │
+│s    │                                                                         -           -              │
+│     │                                                                      -    -  -                     │
+│     │                                                                                   -    - -         │
+│     │                                                                                                -   │
+│     │                                                                                      -    -        │
+│     │                                                                                             -      │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│     │                                                                                                    │
+│ 2.19│                                                                                               -    │
+├─────┼────────────────────────────────────────────────────────────────────────────────────────────────────┤
+│     │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 21:10.08: Job failed: Failed: Build failed