Dec 18 03:10:56.577 INFO checking bobisme/rustrnn against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 03:10:56.577 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 03:10:57.185 INFO [stdout] f42582c4929f7c80df5afebe612cc769aff1deaed8df1df0223d77cd83ddff8d
Dec 18 03:10:57.187 INFO running `"docker" "start" "-a" "f42582c4929f7c80df5afebe612cc769aff1deaed8df1df0223d77cd83ddff8d"`
Dec 18 03:10:58.864 INFO [stderr]     Checking rustrnn v0.1.0 (/opt/crater/workdir)
Dec 18 03:10:59.610 INFO [stderr] warning: struct is never constructed: `Layer`
Dec 18 03:10:59.610 INFO [stderr]  --> src/layer.rs:3:1
Dec 18 03:10:59.610 INFO [stderr]   |
Dec 18 03:10:59.611 INFO [stderr] 3 | pub struct Layer {
Dec 18 03:10:59.611 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Dec 18 03:10:59.611 INFO [stderr]   |
Dec 18 03:10:59.611 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 03:10:59.611 INFO [stderr] 
Dec 18 03:10:59.612 INFO [stderr] warning: method is never used: `new`
Dec 18 03:10:59.612 INFO [stderr]   --> src/layer.rs:10:5
Dec 18 03:10:59.612 INFO [stderr]    |
Dec 18 03:10:59.612 INFO [stderr] 10 |     pub fn new(input_size: usize, size: usize) -> Layer {
Dec 18 03:10:59.613 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:10:59.613 INFO [stderr] 
Dec 18 03:10:59.613 INFO [stderr] warning: method is never used: `size`
Dec 18 03:10:59.613 INFO [stderr]   --> src/layer.rs:18:5
Dec 18 03:10:59.614 INFO [stderr]    |
Dec 18 03:10:59.614 INFO [stderr] 18 |     pub fn size(&self) -> usize {
Dec 18 03:10:59.614 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:10:59.614 INFO [stderr] 
Dec 18 03:10:59.614 INFO [stderr] warning: method is never used: `input_size`
Dec 18 03:10:59.615 INFO [stderr]   --> src/layer.rs:22:5
Dec 18 03:10:59.615 INFO [stderr]    |
Dec 18 03:10:59.615 INFO [stderr] 22 |     pub fn input_size(&self) -> usize {
Dec 18 03:10:59.615 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 03:10:59.616 INFO [stderr] 
Dec 18 03:10:59.688 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 18 03:10:59.688 INFO [stderr]    --> src/matrix.rs:440:13
Dec 18 03:10:59.688 INFO [stderr]     |
Dec 18 03:10:59.688 INFO [stderr] 440 |             m1 + &m2;
Dec 18 03:10:59.688 INFO [stderr]     |             ^^^^^^^^
Dec 18 03:10:59.688 INFO [stderr]     |
Dec 18 03:10:59.688 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 03:10:59.688 INFO [stderr] 
Dec 18 03:10:59.688 INFO [stderr] warning: unused arithmetic operation that must be used
Dec 18 03:10:59.688 INFO [stderr]    --> src/matrix.rs:488:13
Dec 18 03:10:59.688 INFO [stderr]     |
Dec 18 03:10:59.688 INFO [stderr] 488 |             m1 - &m2;
Dec 18 03:10:59.688 INFO [stderr]     |             ^^^^^^^^
Dec 18 03:10:59.688 INFO [stderr] 
Dec 18 03:10:59.724 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
Dec 18 03:11:00.804 INFO running `"docker" "inspect" "f42582c4929f7c80df5afebe612cc769aff1deaed8df1df0223d77cd83ddff8d"`
Dec 18 03:11:01.074 INFO running `"docker" "rm" "-f" "f42582c4929f7c80df5afebe612cc769aff1deaed8df1df0223d77cd83ddff8d"`
Dec 18 03:11:01.404 INFO [stdout] f42582c4929f7c80df5afebe612cc769aff1deaed8df1df0223d77cd83ddff8d