Dec 17 14:16:23.679 INFO checking swizzard/boggler against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 14:16:23.679 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 14:16:24.242 INFO [stdout] fd573e6ff9a7c920b973b4586ef199dcae523b5f6466554fe9a436e359c286c6
Dec 17 14:16:24.244 INFO running `"docker" "start" "-a" "fd573e6ff9a7c920b973b4586ef199dcae523b5f6466554fe9a436e359c286c6"`
Dec 17 14:16:26.932 INFO [stderr]     Checking ascii v0.8.7
Dec 17 14:16:26.932 INFO [stderr]     Checking textwrap v0.9.0
Dec 17 14:16:26.932 INFO [stderr]     Checking rand v0.5.1
Dec 17 14:16:27.772 INFO [stderr]     Checking clap v2.31.2
Dec 17 14:16:33.672 INFO [stderr]     Checking boggler v0.1.0 (/opt/crater/workdir)
Dec 17 14:16:34.320 INFO [stderr] warning: unused variable: `seen`
Dec 17 14:16:34.320 INFO [stderr]    --> src/solver.rs:156:17
Dec 17 14:16:34.320 INFO [stderr]     |
Dec 17 14:16:34.320 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:34.320 INFO [stderr]     |                 ^^^^ help: consider using `_seen` instead
Dec 17 14:16:34.320 INFO [stderr]     |
Dec 17 14:16:34.320 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 17 14:16:34.320 INFO [stderr] 
Dec 17 14:16:34.320 INFO [stderr] warning: unused variable: `adjcts`
Dec 17 14:16:34.320 INFO [stderr]    --> src/solver.rs:158:17
Dec 17 14:16:34.320 INFO [stderr]     |
Dec 17 14:16:34.320 INFO [stderr] 158 |             let adjcts = board.adjacents(x, y);
Dec 17 14:16:34.320 INFO [stderr]     |                 ^^^^^^ help: consider using `_adjcts` instead
Dec 17 14:16:34.320 INFO [stderr] 
Dec 17 14:16:34.376 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:34.376 INFO [stderr]    --> src/solver.rs:154:13
Dec 17 14:16:34.376 INFO [stderr]     |
Dec 17 14:16:34.376 INFO [stderr] 154 |         let mut x = 0;
Dec 17 14:16:34.376 INFO [stderr]     |             ----^
Dec 17 14:16:34.376 INFO [stderr]     |             |
Dec 17 14:16:34.376 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:34.376 INFO [stderr]     |
Dec 17 14:16:34.376 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 14:16:34.376 INFO [stderr] 
Dec 17 14:16:34.376 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:34.376 INFO [stderr]    --> src/solver.rs:155:13
Dec 17 14:16:34.376 INFO [stderr]     |
Dec 17 14:16:34.376 INFO [stderr] 155 |         let mut y = 0;
Dec 17 14:16:34.376 INFO [stderr]     |             ----^
Dec 17 14:16:34.376 INFO [stderr]     |             |
Dec 17 14:16:34.376 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:34.376 INFO [stderr] 
Dec 17 14:16:34.376 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:34.376 INFO [stderr]    --> src/solver.rs:156:13
Dec 17 14:16:34.376 INFO [stderr]     |
Dec 17 14:16:34.376 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:34.376 INFO [stderr]     |             ----^^^^
Dec 17 14:16:34.376 INFO [stderr]     |             |
Dec 17 14:16:34.376 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:34.376 INFO [stderr] 
Dec 17 14:16:34.384 INFO [stderr] warning: method is never used: `find_letter`
Dec 17 14:16:34.384 INFO [stderr]    --> src/solver.rs:149:5
Dec 17 14:16:34.384 INFO [stderr]     |
Dec 17 14:16:34.384 INFO [stderr] 149 |     fn find_letter(&self, chr: &AsciiChar) -> Option<&BTNode> {
Dec 17 14:16:34.384 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:16:34.384 INFO [stderr]     |
Dec 17 14:16:34.384 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 17 14:16:34.384 INFO [stderr] 
Dec 17 14:16:34.472 INFO [stderr] warning: unused variable: `seen`
Dec 17 14:16:34.472 INFO [stderr]    --> src/solver.rs:156:17
Dec 17 14:16:34.472 INFO [stderr]     |
Dec 17 14:16:34.472 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:34.472 INFO [stderr]     |                 ^^^^ help: consider using `_seen` instead
Dec 17 14:16:34.472 INFO [stderr]     |
Dec 17 14:16:34.472 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 17 14:16:34.472 INFO [stderr] 
Dec 17 14:16:34.472 INFO [stderr] warning: unused variable: `adjcts`
Dec 17 14:16:34.472 INFO [stderr]    --> src/solver.rs:158:17
Dec 17 14:16:34.472 INFO [stderr]     |
Dec 17 14:16:34.472 INFO [stderr] 158 |             let adjcts = board.adjacents(x, y);
Dec 17 14:16:34.472 INFO [stderr]     |                 ^^^^^^ help: consider using `_adjcts` instead
Dec 17 14:16:34.472 INFO [stderr] 
Dec 17 14:16:34.560 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:34.560 INFO [stderr]    --> src/solver.rs:154:13
Dec 17 14:16:34.560 INFO [stderr]     |
Dec 17 14:16:34.560 INFO [stderr] 154 |         let mut x = 0;
Dec 17 14:16:34.560 INFO [stderr]     |             ----^
Dec 17 14:16:34.560 INFO [stderr]     |             |
Dec 17 14:16:34.560 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:34.560 INFO [stderr]     |
Dec 17 14:16:34.560 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 17 14:16:34.560 INFO [stderr] 
Dec 17 14:16:34.560 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:34.560 INFO [stderr]    --> src/solver.rs:155:13
Dec 17 14:16:34.560 INFO [stderr]     |
Dec 17 14:16:34.560 INFO [stderr] 155 |         let mut y = 0;
Dec 17 14:16:34.560 INFO [stderr]     |             ----^
Dec 17 14:16:34.560 INFO [stderr]     |             |
Dec 17 14:16:34.560 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:34.560 INFO [stderr] 
Dec 17 14:16:34.561 INFO [stderr] warning: variable does not need to be mutable
Dec 17 14:16:34.561 INFO [stderr]    --> src/solver.rs:156:13
Dec 17 14:16:34.561 INFO [stderr]     |
Dec 17 14:16:34.561 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 17 14:16:34.561 INFO [stderr]     |             ----^^^^
Dec 17 14:16:34.561 INFO [stderr]     |             |
Dec 17 14:16:34.561 INFO [stderr]     |             help: remove this `mut`
Dec 17 14:16:34.561 INFO [stderr] 
Dec 17 14:16:35.091 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.21s
Dec 17 14:16:35.904 INFO running `"docker" "inspect" "fd573e6ff9a7c920b973b4586ef199dcae523b5f6466554fe9a436e359c286c6"`
Dec 17 14:16:36.376 INFO running `"docker" "rm" "-f" "fd573e6ff9a7c920b973b4586ef199dcae523b5f6466554fe9a436e359c286c6"`
Dec 17 14:16:36.752 INFO [stdout] fd573e6ff9a7c920b973b4586ef199dcae523b5f6466554fe9a436e359c286c6