Dec 19 19:43:19.577 INFO checking bobisme/rustrnn against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 19:43:19.577 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/bobisme/rustrnn:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 19:43:19.980 INFO [stdout] f43952862e73c8c2577e0724084e033b406f43129a6492896cb1293e52cdda17
Dec 19 19:43:19.985 INFO running `"docker" "start" "-a" "f43952862e73c8c2577e0724084e033b406f43129a6492896cb1293e52cdda17"`
Dec 19 19:43:21.917 INFO [stderr]     Checking rustrnn v0.1.0 (/opt/crater/workdir)
Dec 19 19:43:22.628 INFO [stderr] warning: struct is never constructed: `Layer`
Dec 19 19:43:22.628 INFO [stderr]  --> src/layer.rs:3:1
Dec 19 19:43:22.628 INFO [stderr]   |
Dec 19 19:43:22.628 INFO [stderr] 3 | pub struct Layer {
Dec 19 19:43:22.628 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 19 19:43:22.628 INFO [stderr]   |
Dec 19 19:43:22.628 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 19:43:22.628 INFO [stderr] 
Dec 19 19:43:22.628 INFO [stderr] warning: method is never used: `new`
Dec 19 19:43:22.628 INFO [stderr]   --> src/layer.rs:10:5
Dec 19 19:43:22.628 INFO [stderr]    |
Dec 19 19:43:22.628 INFO [stderr] 10 |     pub fn new(input_size: usize, size: usize) -> Layer {
Dec 19 19:43:22.628 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:43:22.628 INFO [stderr] 
Dec 19 19:43:22.628 INFO [stderr] warning: method is never used: `size`
Dec 19 19:43:22.628 INFO [stderr]   --> src/layer.rs:18:5
Dec 19 19:43:22.628 INFO [stderr]    |
Dec 19 19:43:22.628 INFO [stderr] 18 |     pub fn size(&self) -> usize {
Dec 19 19:43:22.628 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:43:22.628 INFO [stderr] 
Dec 19 19:43:22.628 INFO [stderr] warning: method is never used: `input_size`
Dec 19 19:43:22.628 INFO [stderr]   --> src/layer.rs:22:5
Dec 19 19:43:22.628 INFO [stderr]    |
Dec 19 19:43:22.628 INFO [stderr] 22 |     pub fn input_size(&self) -> usize {
Dec 19 19:43:22.628 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 19:43:22.628 INFO [stderr] 
Dec 19 19:43:22.690 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 19 19:43:22.690 INFO [stderr]    --> src/matrix.rs:440:13
Dec 19 19:43:22.690 INFO [stderr]     |
Dec 19 19:43:22.690 INFO [stderr] 440 |             m1 + &m2;
Dec 19 19:43:22.690 INFO [stderr]     |             ^^^^^^^^
Dec 19 19:43:22.690 INFO [stderr]     |
Dec 19 19:43:22.691 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 19 19:43:22.691 INFO [stderr] 
Dec 19 19:43:22.692 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 19 19:43:22.692 INFO [stderr]    --> src/matrix.rs:488:13
Dec 19 19:43:22.692 INFO [stderr]     |
Dec 19 19:43:22.692 INFO [stderr] 488 |             m1 - &m2;
Dec 19 19:43:22.692 INFO [stderr]     |             ^^^^^^^^
Dec 19 19:43:22.692 INFO [stderr] 
Dec 19 19:43:22.740 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
Dec 19 19:43:23.680 INFO running `"docker" "inspect" "f43952862e73c8c2577e0724084e033b406f43129a6492896cb1293e52cdda17"`
Dec 19 19:43:24.039 INFO running `"docker" "rm" "-f" "f43952862e73c8c2577e0724084e033b406f43129a6492896cb1293e52cdda17"`
Dec 19 19:43:24.408 INFO [stdout] f43952862e73c8c2577e0724084e033b406f43129a6492896cb1293e52cdda17