Dec 05 07:16:04.542 INFO checking rusty-santa-0.1.0 against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 07:16:04.542 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-0/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 07:16:04.906 INFO [stdout] 4c021dd6e0bbe7b2832d6e7c28422829a81877c60638bdd85fcb90f7bca69c50
Dec 05 07:16:04.906 INFO running `"docker" "start" "-a" "4c021dd6e0bbe7b2832d6e7c28422829a81877c60638bdd85fcb90f7bca69c50"`
Dec 05 07:16:05.899 INFO [stderr] usermod: no changes
Dec 05 07:16:06.030 INFO [stderr]     Checking rusty-santa v0.1.0 (/source)
Dec 05 07:16:07.007 INFO [stderr] warning: method is never used: `get`
Dec 05 07:16:07.007 INFO [stderr]   --> src/lib.rs:64:5
Dec 05 07:16:07.007 INFO [stderr]    |
Dec 05 07:16:07.007 INFO [stderr] 64 |     pub fn get(&self, x: &str, y: &str) -> bool {
Dec 05 07:16:07.007 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:16:07.007 INFO [stderr]    |
Dec 05 07:16:07.007 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 05 07:16:07.007 INFO [stderr] 
Dec 05 07:16:07.007 INFO [stderr] warning: method is never used: `size`
Dec 05 07:16:07.007 INFO [stderr]    --> src/lib.rs:103:5
Dec 05 07:16:07.007 INFO [stderr]     |
Dec 05 07:16:07.007 INFO [stderr] 103 |     pub fn size(&self) -> usize {
Dec 05 07:16:07.007 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 07:16:07.007 INFO [stderr] 
Dec 05 07:16:07.571 INFO [stderr] warning: unused variable: `i`
Dec 05 07:16:07.571 INFO [stderr]    --> src/lib.rs:357:13
Dec 05 07:16:07.571 INFO [stderr]     |
Dec 05 07:16:07.571 INFO [stderr] 357 |         for i in 0..1000 {
Dec 05 07:16:07.571 INFO [stderr]     |             ^ help: consider using `_i` instead
Dec 05 07:16:07.571 INFO [stderr]     |
Dec 05 07:16:07.571 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 05 07:16:07.571 INFO [stderr] 
Dec 05 07:16:07.623 INFO [stderr] warning: variable does not need to be mutable
Dec 05 07:16:07.623 INFO [stderr]    --> src/lib.rs:279:13
Dec 05 07:16:07.623 INFO [stderr]     |
Dec 05 07:16:07.623 INFO [stderr] 279 |         let mut matrix = Matrix::new(keys);
Dec 05 07:16:07.623 INFO [stderr]     |             ----^^^^^^
Dec 05 07:16:07.623 INFO [stderr]     |             |
Dec 05 07:16:07.623 INFO [stderr]     |             help: remove this `mut`
Dec 05 07:16:07.623 INFO [stderr]     |
Dec 05 07:16:07.623 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 05 07:16:07.623 INFO [stderr] 
Dec 05 07:16:07.639 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 07:16:07.639 INFO [stderr]    --> src/lib.rs:358:13
Dec 05 07:16:07.639 INFO [stderr]     |
Dec 05 07:16:07.639 INFO [stderr] 358 |             group.assign();
Dec 05 07:16:07.639 INFO [stderr]     |             ^^^^^^^^^^^^^^^
Dec 05 07:16:07.639 INFO [stderr]     |
Dec 05 07:16:07.639 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 07:16:07.639 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 07:16:07.639 INFO [stderr] 
Dec 05 07:16:08.630 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
Dec 05 07:16:08.631 INFO [stderr] su: No module specific data is present
Dec 05 07:16:09.359 INFO running `"docker" "inspect" "4c021dd6e0bbe7b2832d6e7c28422829a81877c60638bdd85fcb90f7bca69c50"`
Dec 05 07:16:09.631 INFO running `"docker" "rm" "-f" "4c021dd6e0bbe7b2832d6e7c28422829a81877c60638bdd85fcb90f7bca69c50"`
Dec 05 07:16:09.833 INFO [stdout] 4c021dd6e0bbe7b2832d6e7c28422829a81877c60638bdd85fcb90f7bca69c50