Dec 17 14:16:17.665 INFO checking swizzard/boggler against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 14:16:17.665 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/swizzard/boggler:/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 17 14:16:18.163 INFO [stdout] 6267fbbd6f0489a2d1cfacacfbc8576ab0c60a05a4f671bc9713894153fff0b5
Dec 17 14:16:18.165 INFO running `"docker" "start" "-a" "6267fbbd6f0489a2d1cfacacfbc8576ab0c60a05a4f671bc9713894153fff0b5"`
Dec 17 14:16:20.471 INFO [stderr]     Checking rand v0.5.1
Dec 17 14:16:22.792 INFO [stderr]     Checking boggler v0.1.0 (/opt/crater/workdir)
Dec 17 14:16:23.304 INFO [stderr] warning: unused variable: `seen`
Dec 17 14:16:23.305 INFO [stderr]    --> src/solver.rs:156:17
Dec 17 14:16:23.305 INFO [stderr]     |
Dec 17 14:16:23.306 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:23.308 INFO [stderr]     |                 ^^^^ help: consider using `_seen` instead
Dec 17 14:16:23.308 INFO [stderr]     |
Dec 17 14:16:23.308 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 17 14:16:23.308 INFO [stderr] 
Dec 17 14:16:23.308 INFO [stderr] warning: unused variable: `adjcts`
Dec 17 14:16:23.308 INFO [stderr]    --> src/solver.rs:158:17
Dec 17 14:16:23.308 INFO [stderr]     |
Dec 17 14:16:23.308 INFO [stderr] 158 |             let adjcts = board.adjacents(x, y);
Dec 17 14:16:23.308 INFO [stderr]     |                 ^^^^^^ help: consider using `_adjcts` instead
Dec 17 14:16:23.308 INFO [stderr] 
Dec 17 14:16:23.356 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:23.357 INFO [stderr]    --> src/solver.rs:154:13
Dec 17 14:16:23.357 INFO [stderr]     |
Dec 17 14:16:23.357 INFO [stderr] 154 |         let mut x = 0;
Dec 17 14:16:23.358 INFO [stderr]     |             ----^
Dec 17 14:16:23.358 INFO [stderr]     |             |
Dec 17 14:16:23.358 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:23.358 INFO [stderr]     |
Dec 17 14:16:23.358 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 14:16:23.358 INFO [stderr] 
Dec 17 14:16:23.358 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:23.358 INFO [stderr]    --> src/solver.rs:155:13
Dec 17 14:16:23.358 INFO [stderr]     |
Dec 17 14:16:23.358 INFO [stderr] 155 |         let mut y = 0;
Dec 17 14:16:23.358 INFO [stderr]     |             ----^
Dec 17 14:16:23.358 INFO [stderr]     |             |
Dec 17 14:16:23.358 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:23.358 INFO [stderr] 
Dec 17 14:16:23.358 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:23.358 INFO [stderr]    --> src/solver.rs:156:13
Dec 17 14:16:23.358 INFO [stderr]     |
Dec 17 14:16:23.358 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:23.358 INFO [stderr]     |             ----^^^^
Dec 17 14:16:23.358 INFO [stderr]     |             |
Dec 17 14:16:23.358 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:23.358 INFO [stderr] 
Dec 17 14:16:23.472 INFO [stderr] warning: unused variable: `seen`
Dec 17 14:16:23.472 INFO [stderr]    --> src/solver.rs:156:17
Dec 17 14:16:23.472 INFO [stderr]     |
Dec 17 14:16:23.473 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:23.476 INFO [stderr]     |                 ^^^^ help: consider using `_seen` instead
Dec 17 14:16:23.476 INFO [stderr]     |
Dec 17 14:16:23.476 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 17 14:16:23.476 INFO [stderr] 
Dec 17 14:16:23.476 INFO [stderr] warning: unused variable: `adjcts`
Dec 17 14:16:23.476 INFO [stderr]    --> src/solver.rs:158:17
Dec 17 14:16:23.476 INFO [stderr]     |
Dec 17 14:16:23.476 INFO [stderr] 158 |             let adjcts = board.adjacents(x, y);
Dec 17 14:16:23.476 INFO [stderr]     |                 ^^^^^^ help: consider using `_adjcts` instead
Dec 17 14:16:23.476 INFO [stderr] 
Dec 17 14:16:23.527 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:23.527 INFO [stderr]    --> src/solver.rs:154:13
Dec 17 14:16:23.527 INFO [stderr]     |
Dec 17 14:16:23.527 INFO [stderr] 154 |         let mut x = 0;
Dec 17 14:16:23.527 INFO [stderr]     |             ----^
Dec 17 14:16:23.527 INFO [stderr]     |             |
Dec 17 14:16:23.527 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:23.527 INFO [stderr]     |
Dec 17 14:16:23.527 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 14:16:23.527 INFO [stderr] 
Dec 17 14:16:23.527 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:23.527 INFO [stderr]    --> src/solver.rs:155:13
Dec 17 14:16:23.527 INFO [stderr]     |
Dec 17 14:16:23.527 INFO [stderr] 155 |         let mut y = 0;
Dec 17 14:16:23.527 INFO [stderr]     |             ----^
Dec 17 14:16:23.527 INFO [stderr]     |             |
Dec 17 14:16:23.527 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:23.527 INFO [stderr] 
Dec 17 14:16:23.527 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:23.527 INFO [stderr]    --> src/solver.rs:156:13
Dec 17 14:16:23.528 INFO [stderr]     |
Dec 17 14:16:23.528 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:23.528 INFO [stderr]     |             ----^^^^
Dec 17 14:16:23.528 INFO [stderr]     |             |
Dec 17 14:16:23.528 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:23.528 INFO [stderr] 
Dec 17 14:16:23.535 INFO [stderr] warning: method is never used: `find_letter`
Dec 17 14:16:23.535 INFO [stderr]    --> src/solver.rs:149:5
Dec 17 14:16:23.535 INFO [stderr]     |
Dec 17 14:16:23.535 INFO [stderr] 149 |     fn find_letter(&self, chr: &AsciiChar) -> Option<&BTNode> {
Dec 17 14:16:23.535 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:16:23.535 INFO [stderr]     |
Dec 17 14:16:23.535 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 17 14:16:23.535 INFO [stderr] 
Dec 17 14:16:23.996 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.61s
Dec 17 14:16:25.181 INFO running `"docker" "inspect" "6267fbbd6f0489a2d1cfacacfbc8576ab0c60a05a4f671bc9713894153fff0b5"`
Dec 17 14:16:25.446 INFO running `"docker" "rm" "-f" "6267fbbd6f0489a2d1cfacacfbc8576ab0c60a05a4f671bc9713894153fff0b5"`
Dec 17 14:16:25.908 INFO [stdout] 6267fbbd6f0489a2d1cfacacfbc8576ab0c60a05a4f671bc9713894153fff0b5