Dec 19 09:08:40.271 INFO checking sebm/checkers against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 09:08:40.272 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/sebm/checkers:/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 09:08:40.760 INFO [stdout] 86b154b6f0305e9e69bd5a65d17a3fa4fc39b00943432888d29f73e965e16f92
Dec 19 09:08:40.768 INFO running `"docker" "start" "-a" "86b154b6f0305e9e69bd5a65d17a3fa4fc39b00943432888d29f73e965e16f92"`
Dec 19 09:08:42.176 INFO [stderr]     Checking checkers v0.1.0 (/opt/crater/workdir)
Dec 19 09:08:42.436 INFO [stderr] warning: unused import: `initial_board`
Dec 19 09:08:42.436 INFO [stderr]  --> src/main.rs:4:26
Dec 19 09:08:42.436 INFO [stderr]   |
Dec 19 09:08:42.436 INFO [stderr] 4 | use board::{BoardSquare, initial_board, draw_board};
Dec 19 09:08:42.436 INFO [stderr]   |                          ^^^^^^^^^^^^^
Dec 19 09:08:42.436 INFO [stderr]   |
Dec 19 09:08:42.436 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 09:08:42.436 INFO [stderr] 
Dec 19 09:08:42.520 INFO [stderr] warning: unused import: `initial_board`
Dec 19 09:08:42.520 INFO [stderr]  --> src/main.rs:4:26
Dec 19 09:08:42.520 INFO [stderr]   |
Dec 19 09:08:42.520 INFO [stderr] 4 | use board::{BoardSquare, initial_board, draw_board};
Dec 19 09:08:42.520 INFO [stderr]   |                          ^^^^^^^^^^^^^
Dec 19 09:08:42.520 INFO [stderr]   |
Dec 19 09:08:42.520 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 09:08:42.520 INFO [stderr] 
Dec 19 09:08:42.688 INFO [stderr] warning: function is never used: `initial_board`
Dec 19 09:08:42.688 INFO [stderr]   --> src/board.rs:26:1
Dec 19 09:08:42.688 INFO [stderr]    |
Dec 19 09:08:42.688 INFO [stderr] 26 | pub fn initial_board() -> [[BoardSquare; 8]; 8] {
Dec 19 09:08:42.688 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:08:42.688 INFO [stderr]    |
Dec 19 09:08:42.688 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 09:08:42.688 INFO [stderr] 
Dec 19 09:08:42.710 INFO [stderr] warning: function is never used: `initial_board`
Dec 19 09:08:42.710 INFO [stderr]   --> src/board.rs:26:1
Dec 19 09:08:42.744 INFO [stderr]    |
Dec 19 09:08:42.744 INFO [stderr] 26 | pub fn initial_board() -> [[BoardSquare; 8]; 8] {
Dec 19 09:08:42.744 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 09:08:42.744 INFO [stderr]    |
Dec 19 09:08:42.744 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 09:08:42.744 INFO [stderr] 
Dec 19 09:08:42.744 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
Dec 19 09:08:43.550 INFO running `"docker" "inspect" "86b154b6f0305e9e69bd5a65d17a3fa4fc39b00943432888d29f73e965e16f92"`
Dec 19 09:08:43.884 INFO running `"docker" "rm" "-f" "86b154b6f0305e9e69bd5a65d17a3fa4fc39b00943432888d29f73e965e16f92"`
Dec 19 09:08:44.204 INFO [stdout] 86b154b6f0305e9e69bd5a65d17a3fa4fc39b00943432888d29f73e965e16f92