[INFO] updating cached repository mvlabat/rust_mnist_gradient_descent
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mvlabat/rust_mnist_gradient_descent
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mvlabat/rust_mnist_gradient_descent" "work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/mvlabat/rust_mnist_gradient_descent"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/mvlabat/rust_mnist_gradient_descent'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mvlabat/rust_mnist_gradient_descent" "work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/mvlabat/rust_mnist_gradient_descent"`
[INFO] [stderr] Cloning into 'work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/mvlabat/rust_mnist_gradient_descent'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b26648827dd1873edf9ec7002b4ad8773e5db0be
[INFO] sha for GitHub repo mvlabat/rust_mnist_gradient_descent: b26648827dd1873edf9ec7002b4ad8773e5db0be
[INFO] validating manifest of mvlabat/rust_mnist_gradient_descent on toolchain master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mvlabat/rust_mnist_gradient_descent on toolchain try#7fea0229842e79db1159ea58ad9a653b288efee9
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing mvlabat/rust_mnist_gradient_descent
[INFO] finished frobbing mvlabat/rust_mnist_gradient_descent
[INFO] frobbed toml for mvlabat/rust_mnist_gradient_descent written to work/ex/pr-57967/sources/master#c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54/gh/mvlabat/rust_mnist_gradient_descent/Cargo.toml
[INFO] started frobbing mvlabat/rust_mnist_gradient_descent
[INFO] finished frobbing mvlabat/rust_mnist_gradient_descent
[INFO] frobbed toml for mvlabat/rust_mnist_gradient_descent written to work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/mvlabat/rust_mnist_gradient_descent/Cargo.toml
[INFO] crate mvlabat/rust_mnist_gradient_descent has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c1c3c4e95b69dfeaca5c5db6c622d7f90ad30a54-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing mvlabat/rust_mnist_gradient_descent against try#7fea0229842e79db1159ea58ad9a653b288efee9 for pr-57967
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/mvlabat/rust_mnist_gradient_descent:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "build" "--frozen"`
[INFO] [stdout] cc308fb959248abc504bc4bd144cc0b5e19f605bb1cb5b5b4ecc69826a00891c
[INFO] running `"docker" "start" "-a" "cc308fb959248abc504bc4bd144cc0b5e19f605bb1cb5b5b4ecc69826a00891c"`
[INFO] [stderr]    Compiling num-complex v0.1.41
[INFO] [stderr]    Compiling mnist v0.4.0
[INFO] [stderr]    Compiling alga v0.5.2
[INFO] [stderr]    Compiling nalgebra v0.13.1
[INFO] [stderr]    Compiling rust_mnist_gradient_descent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `hypothesis`
[INFO] [stderr]   --> src/main.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn hypothesis(weigts: &WeightVector, image: &Image) -> f32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_i`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn print_i(image: &WeightVector) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 37.26s
[INFO] running `"docker" "inspect" "cc308fb959248abc504bc4bd144cc0b5e19f605bb1cb5b5b4ecc69826a00891c"`
[INFO] running `"docker" "rm" "-f" "cc308fb959248abc504bc4bd144cc0b5e19f605bb1cb5b5b4ecc69826a00891c"`
[INFO] [stdout] cc308fb959248abc504bc4bd144cc0b5e19f605bb1cb5b5b4ecc69826a00891c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/mvlabat/rust_mnist_gradient_descent:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] e68d032e9c953e3d264c9b3dfb4879a21917cf50e6789b508b58ce495e69a1b6
[INFO] running `"docker" "start" "-a" "e68d032e9c953e3d264c9b3dfb4879a21917cf50e6789b508b58ce495e69a1b6"`
[INFO] [stderr]    Compiling rust_mnist_gradient_descent v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `hypothesis`
[INFO] [stderr]   --> src/main.rs:27:1
[INFO] [stderr]    |
[INFO] [stderr] 27 | fn hypothesis(weigts: &WeightVector, image: &Image) -> f32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_i`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn print_i(image: &WeightVector) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.08s
[INFO] running `"docker" "inspect" "e68d032e9c953e3d264c9b3dfb4879a21917cf50e6789b508b58ce495e69a1b6"`
[INFO] running `"docker" "rm" "-f" "e68d032e9c953e3d264c9b3dfb4879a21917cf50e6789b508b58ce495e69a1b6"`
[INFO] [stdout] e68d032e9c953e3d264c9b3dfb4879a21917cf50e6789b508b58ce495e69a1b6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57967/worker-2/try#7fea0229842e79db1159ea58ad9a653b288efee9:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57967/sources/try#7fea0229842e79db1159ea58ad9a653b288efee9/gh/mvlabat/rust_mnist_gradient_descent:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+7fea0229842e79db1159ea58ad9a653b288efee9-alt" "test" "--frozen"`
[INFO] [stdout] dc66114e1345a788b405eaca4c5575e33e753a69dcce2e4a28120cacdaff106a
[INFO] running `"docker" "start" "-a" "dc66114e1345a788b405eaca4c5575e33e753a69dcce2e4a28120cacdaff106a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_mnist_gradient_descent-323e678854b964c3
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "dc66114e1345a788b405eaca4c5575e33e753a69dcce2e4a28120cacdaff106a"`
[INFO] running `"docker" "rm" "-f" "dc66114e1345a788b405eaca4c5575e33e753a69dcce2e4a28120cacdaff106a"`
[INFO] [stdout] dc66114e1345a788b405eaca4c5575e33e753a69dcce2e4a28120cacdaff106a