[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-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/gh/mvlabat/rust_mnist_gradient_descent"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/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-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/mvlabat/rust_mnist_gradient_descent"`
[INFO] [stderr] Cloning into 'work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/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#efe2f32a6b8217425f361ec7c206910c611c03ee
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mvlabat/rust_mnist_gradient_descent on toolchain try#78b0bd8441ef961f6475e3d47fe3bca38cb83432
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-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-60039/sources/master#efe2f32a6b8217425f361ec7c206910c611c03ee/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-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/gh/mvlabat/rust_mnist_gradient_descent/Cargo.toml
[INFO] crate mvlabat/rust_mnist_gradient_descent already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+efe2f32a6b8217425f361ec7c206910c611c03ee-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mvlabat/rust_mnist_gradient_descent against try#78b0bd8441ef961f6475e3d47fe3bca38cb83432 for pr-60039
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-60039/worker-2/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-60039/sources/try#78b0bd8441ef961f6475e3d47fe3bca38cb83432/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" "+78b0bd8441ef961f6475e3d47fe3bca38cb83432-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 03862de7d1473a514bfa13380be2a85836b08f96b19a0d294d0ab2405740d368
[INFO] running `"docker" "start" "-a" "03862de7d1473a514bfa13380be2a85836b08f96b19a0d294d0ab2405740d368"`
[INFO] [stderr]     Checking num-complex v0.1.41
[INFO] [stderr]     Checking generic-array v0.8.3
[INFO] [stderr]     Checking alga v0.5.2
[INFO] [stderr]     Checking nalgebra v0.13.1
[INFO] [stderr]     Checking 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] 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 34.53s
[INFO] running `"docker" "inspect" "03862de7d1473a514bfa13380be2a85836b08f96b19a0d294d0ab2405740d368"`
[INFO] running `"docker" "rm" "-f" "03862de7d1473a514bfa13380be2a85836b08f96b19a0d294d0ab2405740d368"`
[INFO] [stdout] 03862de7d1473a514bfa13380be2a85836b08f96b19a0d294d0ab2405740d368