Dec 17 15:47:45.115 INFO checking sebm/checkers against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 15:47:45.115 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:47:45.688 INFO [stdout] dc94ed3f6b053cd87f68266360264639f58bfee7ce81fa49cb72c96cd09ccc2f
Dec 17 15:47:45.694 INFO running `"docker" "start" "-a" "dc94ed3f6b053cd87f68266360264639f58bfee7ce81fa49cb72c96cd09ccc2f"`
Dec 17 15:47:47.616 INFO [stderr]     Checking checkers v0.1.0 (/opt/crater/workdir)
Dec 17 15:47:47.795 INFO [stderr] warning: unused import: `initial_board`
Dec 17 15:47:47.795 INFO [stderr]  --> src/main.rs:4:26
Dec 17 15:47:47.795 INFO [stderr]   |
Dec 17 15:47:47.795 INFO [stderr] 4 | use board::{BoardSquare, initial_board, draw_board};
Dec 17 15:47:47.795 INFO [stderr]   |                          ^^^^^^^^^^^^^
Dec 17 15:47:47.795 INFO [stderr]   |
Dec 17 15:47:47.795 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 15:47:47.795 INFO [stderr] 
Dec 17 15:47:47.820 INFO [stderr] warning: unused import: `initial_board`
Dec 17 15:47:47.820 INFO [stderr]  --> src/main.rs:4:26
Dec 17 15:47:47.820 INFO [stderr]   |
Dec 17 15:47:47.820 INFO [stderr] 4 | use board::{BoardSquare, initial_board, draw_board};
Dec 17 15:47:47.820 INFO [stderr]   |                          ^^^^^^^^^^^^^
Dec 17 15:47:47.820 INFO [stderr]   |
Dec 17 15:47:47.820 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 15:47:47.820 INFO [stderr] 
Dec 17 15:47:47.915 INFO [stderr] warning: function is never used: `initial_board`
Dec 17 15:47:47.915 INFO [stderr]   --> src/board.rs:26:1
Dec 17 15:47:47.915 INFO [stderr]    |
Dec 17 15:47:47.915 INFO [stderr] 26 | pub fn initial_board() -> [[BoardSquare; 8]; 8] {
Dec 17 15:47:47.915 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:47:47.915 INFO [stderr]    |
Dec 17 15:47:47.915 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 15:47:47.915 INFO [stderr] 
Dec 17 15:47:47.964 INFO [stderr] warning: function is never used: `initial_board`
Dec 17 15:47:47.964 INFO [stderr]   --> src/board.rs:26:1
Dec 17 15:47:47.964 INFO [stderr]    |
Dec 17 15:47:47.964 INFO [stderr] 26 | pub fn initial_board() -> [[BoardSquare; 8]; 8] {
Dec 17 15:47:47.964 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 15:47:47.964 INFO [stderr]    |
Dec 17 15:47:47.964 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 15:47:47.964 INFO [stderr] 
Dec 17 15:47:48.008 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.43s
Dec 17 15:47:48.780 INFO running `"docker" "inspect" "dc94ed3f6b053cd87f68266360264639f58bfee7ce81fa49cb72c96cd09ccc2f"`
Dec 17 15:47:49.126 INFO running `"docker" "rm" "-f" "dc94ed3f6b053cd87f68266360264639f58bfee7ce81fa49cb72c96cd09ccc2f"`
Dec 17 15:47:49.472 INFO [stdout] dc94ed3f6b053cd87f68266360264639f58bfee7ce81fa49cb72c96cd09ccc2f