[INFO] updating cached repository tuvistavie/rust-simple-nn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tuvistavie/rust-simple-nn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tuvistavie/rust-simple-nn" "work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/tuvistavie/rust-simple-nn"`
[INFO] [stderr] Cloning into 'work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/tuvistavie/rust-simple-nn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tuvistavie/rust-simple-nn" "work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/tuvistavie/rust-simple-nn"`
[INFO] [stderr] Cloning into 'work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/tuvistavie/rust-simple-nn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 45fb6576aab9a572d0bc0e416ba286983cfdd95b
[INFO] sha for GitHub repo tuvistavie/rust-simple-nn: 45fb6576aab9a572d0bc0e416ba286983cfdd95b
[INFO] validating manifest of tuvistavie/rust-simple-nn on toolchain master#589beb979c0f1a9736e02e578913db88398c3ba5
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tuvistavie/rust-simple-nn on toolchain try#42445ded8fd34235a676755cb5d079658ed51f6a
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+42445ded8fd34235a676755cb5d079658ed51f6a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tuvistavie/rust-simple-nn
[INFO] finished frobbing tuvistavie/rust-simple-nn
[INFO] frobbed toml for tuvistavie/rust-simple-nn written to work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/tuvistavie/rust-simple-nn/Cargo.toml
[INFO] started frobbing tuvistavie/rust-simple-nn
[INFO] finished frobbing tuvistavie/rust-simple-nn
[INFO] frobbed toml for tuvistavie/rust-simple-nn written to work/ex/pr-60944/sources/try#42445ded8fd34235a676755cb5d079658ed51f6a/gh/tuvistavie/rust-simple-nn/Cargo.toml
[INFO] crate tuvistavie/rust-simple-nn already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+42445ded8fd34235a676755cb5d079658ed51f6a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking tuvistavie/rust-simple-nn against master#589beb979c0f1a9736e02e578913db88398c3ba5 for pr-60944
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-60944/worker-6/master#589beb979c0f1a9736e02e578913db88398c3ba5:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-60944/sources/master#589beb979c0f1a9736e02e578913db88398c3ba5/gh/tuvistavie/rust-simple-nn:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+589beb979c0f1a9736e02e578913db88398c3ba5-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 118b19b009cb911471b6cbad41290ae78a373b407b9a8cf63dd974265b0474e1
[INFO] running `"docker" "start" "-a" "118b19b009cb911471b6cbad41290ae78a373b407b9a8cf63dd974265b0474e1"`
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking simple_nn v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/nn/network.rs:126:17
[INFO] [stderr]     |
[INFO] [stderr] 126 |             let mut weights = self.get_mut_layer(index).get_mut_weights();
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/nn/network.rs:126:17
[INFO] [stderr]     |
[INFO] [stderr] 126 |             let mut weights = self.get_mut_layer(index).get_mut_weights();
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> tests/linalg_matrix.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 35 |     &matrix + &other;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.29s
[INFO] running `"docker" "inspect" "118b19b009cb911471b6cbad41290ae78a373b407b9a8cf63dd974265b0474e1"`
[INFO] running `"docker" "rm" "-f" "118b19b009cb911471b6cbad41290ae78a373b407b9a8cf63dd974265b0474e1"`
[INFO] [stdout] 118b19b009cb911471b6cbad41290ae78a373b407b9a8cf63dd974265b0474e1