[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-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/mvlabat/rust_mnist_gradient_descent"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/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-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/mvlabat/rust_mnist_gradient_descent"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/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#2bde39b8edce6463e1c37f8a8082a875e7b536b1
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of mvlabat/rust_mnist_gradient_descent on toolchain try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-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-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/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-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/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" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking mvlabat/rust_mnist_gradient_descent against master#2bde39b8edce6463e1c37f8a8082a875e7b536b1 for pr-57483
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57483/worker-2/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/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" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 15c1dfc0970166472c6af021d0da27ef3f9e877a1cdb31d59bd78b1142e30c1e
[INFO] running `"docker" "start" "-a" "15c1dfc0970166472c6af021d0da27ef3f9e877a1cdb31d59bd78b1142e30c1e"`
[INFO] [stderr]     Checking num-complex v0.1.41
[INFO] [stderr]     Checking mnist v0.4.0
[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 35.10s
[INFO] running `"docker" "inspect" "15c1dfc0970166472c6af021d0da27ef3f9e877a1cdb31d59bd78b1142e30c1e"`
[INFO] running `"docker" "rm" "-f" "15c1dfc0970166472c6af021d0da27ef3f9e877a1cdb31d59bd78b1142e30c1e"`
[INFO] [stdout] 15c1dfc0970166472c6af021d0da27ef3f9e877a1cdb31d59bd78b1142e30c1e