Dec 18 01:18:21.287 INFO checking djmcgill/Rubble against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 01:18:21.287 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/djmcgill/Rubble:/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 18 01:18:21.688 INFO [stdout] e175678f9b0b67b62a5f05a69d104b29e1663b6af7f143d758d580ab077e8edd
Dec 18 01:18:21.690 INFO running `"docker" "start" "-a" "e175678f9b0b67b62a5f05a69d104b29e1663b6af7f143d758d580ab077e8edd"`
Dec 18 01:18:24.268 INFO [stderr]     Checking rubble v0.1.0 (/opt/crater/workdir)
Dec 18 01:18:24.754 INFO [stderr] warning: constant item is never used: `HAND_LIMIT`
Dec 18 01:18:24.754 INFO [stderr]  --> src/main.rs:8:1
Dec 18 01:18:24.754 INFO [stderr]   |
Dec 18 01:18:24.754 INFO [stderr] 8 | const HAND_LIMIT: usize = 7;
Dec 18 01:18:24.754 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 01:18:24.754 INFO [stderr]   |
Dec 18 01:18:24.754 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 01:18:24.754 INFO [stderr] 
Dec 18 01:18:24.754 INFO [stderr] warning: variant is never constructed: `Placed`
Dec 18 01:18:24.754 INFO [stderr]   --> src/main.rs:28:5
Dec 18 01:18:24.754 INFO [stderr]    |
Dec 18 01:18:24.754 INFO [stderr] 28 |     Placed(char),
Dec 18 01:18:24.754 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.754 INFO [stderr] 
Dec 18 01:18:24.754 INFO [stderr] warning: variant is never constructed: `Bonus`
Dec 18 01:18:24.754 INFO [stderr]   --> src/main.rs:29:5
Dec 18 01:18:24.754 INFO [stderr]    |
Dec 18 01:18:24.754 INFO [stderr] 29 |     Bonus(Bonus),
Dec 18 01:18:24.754 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.754 INFO [stderr] 
Dec 18 01:18:24.754 INFO [stderr] warning: variant is never constructed: `DoubleLetter`
Dec 18 01:18:24.754 INFO [stderr]   --> src/main.rs:42:5
Dec 18 01:18:24.754 INFO [stderr]    |
Dec 18 01:18:24.754 INFO [stderr] 42 |     DoubleLetter,
Dec 18 01:18:24.754 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.754 INFO [stderr] 
Dec 18 01:18:24.761 INFO [stderr] warning: variable does not need to be mutable
Dec 18 01:18:24.761 INFO [stderr]    --> src/main.rs:162:13
Dec 18 01:18:24.761 INFO [stderr]     |
Dec 18 01:18:24.761 INFO [stderr] 162 |         let mut board = Board([[Cell::Placed('c'); BOARD_WIDTH]; BOARD_HEIGHT]);
Dec 18 01:18:24.761 INFO [stderr]     |             ----^^^^^
Dec 18 01:18:24.761 INFO [stderr]     |             |
Dec 18 01:18:24.761 INFO [stderr]     |             help: remove this `mut`
Dec 18 01:18:24.761 INFO [stderr]     |
Dec 18 01:18:24.761 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 18 01:18:24.761 INFO [stderr] 
Dec 18 01:18:24.761 INFO [stderr] warning: variant is never constructed: `TripleLetter`
Dec 18 01:18:24.761 INFO [stderr]   --> src/main.rs:43:5
Dec 18 01:18:24.761 INFO [stderr]    |
Dec 18 01:18:24.761 INFO [stderr] 43 |     TripleLetter,
Dec 18 01:18:24.761 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.761 INFO [stderr] 
Dec 18 01:18:24.762 INFO [stderr] warning: variant is never constructed: `DoubleWord`
Dec 18 01:18:24.762 INFO [stderr]   --> src/main.rs:44:5
Dec 18 01:18:24.762 INFO [stderr]    |
Dec 18 01:18:24.762 INFO [stderr] 44 |     DoubleWord,
Dec 18 01:18:24.762 INFO [stderr]    |     ^^^^^^^^^^
Dec 18 01:18:24.762 INFO [stderr] 
Dec 18 01:18:24.762 INFO [stderr] warning: variant is never constructed: `TripleWord`
Dec 18 01:18:24.762 INFO [stderr]   --> src/main.rs:45:5
Dec 18 01:18:24.762 INFO [stderr]    |
Dec 18 01:18:24.762 INFO [stderr] 45 |     TripleWord,
Dec 18 01:18:24.762 INFO [stderr]    |     ^^^^^^^^^^
Dec 18 01:18:24.762 INFO [stderr] 
Dec 18 01:18:24.762 INFO [stderr] warning: method is never used: `all_tiles_connected`
Dec 18 01:18:24.762 INFO [stderr]   --> src/main.rs:75:5
Dec 18 01:18:24.762 INFO [stderr]    |
Dec 18 01:18:24.762 INFO [stderr] 75 |     pub fn all_tiles_connected(&self) -> bool {
Dec 18 01:18:24.762 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 01:18:24.762 INFO [stderr] 
Dec 18 01:18:24.762 INFO [stderr] warning: struct is never constructed: `Game`
Dec 18 01:18:24.762 INFO [stderr]    --> src/main.rs:128:1
Dec 18 01:18:24.762 INFO [stderr]     |
Dec 18 01:18:24.762 INFO [stderr] 128 | struct Game {
Dec 18 01:18:24.762 INFO [stderr]     | ^^^^^^^^^^^
Dec 18 01:18:24.762 INFO [stderr] 
Dec 18 01:18:24.763 INFO [stderr] warning: constant item is never used: `HAND_LIMIT`
Dec 18 01:18:24.763 INFO [stderr]  --> src/main.rs:8:1
Dec 18 01:18:24.763 INFO [stderr]   |
Dec 18 01:18:24.763 INFO [stderr] 8 | const HAND_LIMIT: usize = 7;
Dec 18 01:18:24.763 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 01:18:24.763 INFO [stderr]   |
Dec 18 01:18:24.763 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 01:18:24.763 INFO [stderr] 
Dec 18 01:18:24.763 INFO [stderr] warning: variant is never constructed: `Bonus`
Dec 18 01:18:24.763 INFO [stderr]   --> src/main.rs:29:5
Dec 18 01:18:24.763 INFO [stderr]    |
Dec 18 01:18:24.763 INFO [stderr] 29 |     Bonus(Bonus),
Dec 18 01:18:24.763 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.764 INFO [stderr] 
Dec 18 01:18:24.764 INFO [stderr] warning: variant is never constructed: `DoubleLetter`
Dec 18 01:18:24.764 INFO [stderr]   --> src/main.rs:42:5
Dec 18 01:18:24.764 INFO [stderr]    |
Dec 18 01:18:24.764 INFO [stderr] 42 |     DoubleLetter,
Dec 18 01:18:24.764 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.764 INFO [stderr] 
Dec 18 01:18:24.764 INFO [stderr] warning: variant is never constructed: `TripleLetter`
Dec 18 01:18:24.764 INFO [stderr]   --> src/main.rs:43:5
Dec 18 01:18:24.764 INFO [stderr]    |
Dec 18 01:18:24.764 INFO [stderr] 43 |     TripleLetter,
Dec 18 01:18:24.764 INFO [stderr]    |     ^^^^^^^^^^^^
Dec 18 01:18:24.764 INFO [stderr] 
Dec 18 01:18:24.765 INFO [stderr] warning: variant is never constructed: `DoubleWord`
Dec 18 01:18:24.765 INFO [stderr]   --> src/main.rs:44:5
Dec 18 01:18:24.765 INFO [stderr]    |
Dec 18 01:18:24.765 INFO [stderr] 44 |     DoubleWord,
Dec 18 01:18:24.765 INFO [stderr]    |     ^^^^^^^^^^
Dec 18 01:18:24.765 INFO [stderr] 
Dec 18 01:18:24.765 INFO [stderr] warning: variant is never constructed: `TripleWord`
Dec 18 01:18:24.765 INFO [stderr]   --> src/main.rs:45:5
Dec 18 01:18:24.765 INFO [stderr]    |
Dec 18 01:18:24.765 INFO [stderr] 45 |     TripleWord,
Dec 18 01:18:24.765 INFO [stderr]    |     ^^^^^^^^^^
Dec 18 01:18:24.765 INFO [stderr] 
Dec 18 01:18:24.765 INFO [stderr] warning: struct is never constructed: `Game`
Dec 18 01:18:24.765 INFO [stderr]    --> src/main.rs:128:1
Dec 18 01:18:24.766 INFO [stderr]     |
Dec 18 01:18:24.766 INFO [stderr] 128 | struct Game {
Dec 18 01:18:24.766 INFO [stderr]     | ^^^^^^^^^^^
Dec 18 01:18:24.766 INFO [stderr] 
Dec 18 01:18:24.843 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
Dec 18 01:18:26.061 INFO running `"docker" "inspect" "e175678f9b0b67b62a5f05a69d104b29e1663b6af7f143d758d580ab077e8edd"`
Dec 18 01:18:26.398 INFO running `"docker" "rm" "-f" "e175678f9b0b67b62a5f05a69d104b29e1663b6af7f143d758d580ab077e8edd"`
Dec 18 01:18:26.756 INFO [stdout] e175678f9b0b67b62a5f05a69d104b29e1663b6af7f143d758d580ab077e8edd