Dec 11 08:24:27.364 INFO checking swizzard/boggler against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 08:24:27.364 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-1/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 08:24:27.938 INFO [stdout] ebc216f70dc982d4805a408ef92d1dc9912a60d99aad59e9b2a2478d654cc5bd
Dec 11 08:24:27.940 INFO running `"docker" "start" "-a" "ebc216f70dc982d4805a408ef92d1dc9912a60d99aad59e9b2a2478d654cc5bd"`
Dec 11 08:24:30.097 INFO [stderr] usermod: no changes
Dec 11 08:24:30.229 INFO [stderr]     Checking ascii v0.8.7
Dec 11 08:24:30.244 INFO [stderr]     Checking rand v0.5.1
Dec 11 08:24:30.248 INFO [stderr]     Checking clap v2.31.2
Dec 11 08:24:37.312 INFO [stderr]     Checking boggler v0.1.0 (/source)
Dec 11 08:24:37.900 INFO [stderr] warning: unused variable: `seen`
Dec 11 08:24:37.900 INFO [stderr]    --> src/solver.rs:156:17
Dec 11 08:24:37.900 INFO [stderr]     |
Dec 11 08:24:37.900 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 11 08:24:37.900 INFO [stderr]     |                 ^^^^ help: consider using `_seen` instead
Dec 11 08:24:37.900 INFO [stderr]     |
Dec 11 08:24:37.900 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 11 08:24:37.900 INFO [stderr] 
Dec 11 08:24:37.900 INFO [stderr] warning: unused variable: `adjcts`
Dec 11 08:24:37.900 INFO [stderr]    --> src/solver.rs:158:17
Dec 11 08:24:37.900 INFO [stderr]     |
Dec 11 08:24:37.900 INFO [stderr] 158 |             let adjcts = board.adjacents(x, y);
Dec 11 08:24:37.900 INFO [stderr]     |                 ^^^^^^ help: consider using `_adjcts` instead
Dec 11 08:24:37.900 INFO [stderr] 
Dec 11 08:24:37.944 INFO [stderr] warning: variable does not need to be mutable
Dec 11 08:24:37.944 INFO [stderr]    --> src/solver.rs:154:13
Dec 11 08:24:37.944 INFO [stderr]     |
Dec 11 08:24:37.944 INFO [stderr] 154 |         let mut x = 0;
Dec 11 08:24:37.944 INFO [stderr]     |             ----^
Dec 11 08:24:37.944 INFO [stderr]     |             |
Dec 11 08:24:37.944 INFO [stderr]     |             help: remove this `mut`
Dec 11 08:24:37.944 INFO [stderr]     |
Dec 11 08:24:37.944 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 08:24:37.944 INFO [stderr] 
Dec 11 08:24:37.944 INFO [stderr] warning: variable does not need to be mutable
Dec 11 08:24:37.944 INFO [stderr]    --> src/solver.rs:155:13
Dec 11 08:24:37.944 INFO [stderr]     |
Dec 11 08:24:37.944 INFO [stderr] 155 |         let mut y = 0;
Dec 11 08:24:37.944 INFO [stderr]     |             ----^
Dec 11 08:24:37.944 INFO [stderr]     |             |
Dec 11 08:24:37.944 INFO [stderr]     |             help: remove this `mut`
Dec 11 08:24:37.944 INFO [stderr] 
Dec 11 08:24:37.944 INFO [stderr] warning: variable does not need to be mutable
Dec 11 08:24:37.944 INFO [stderr]    --> src/solver.rs:156:13
Dec 11 08:24:37.944 INFO [stderr]     |
Dec 11 08:24:37.944 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 11 08:24:37.944 INFO [stderr]     |             ----^^^^
Dec 11 08:24:37.944 INFO [stderr]     |             |
Dec 11 08:24:37.944 INFO [stderr]     |             help: remove this `mut`
Dec 11 08:24:37.944 INFO [stderr] 
Dec 11 08:24:37.948 INFO [stderr] warning: unused variable: `seen`
Dec 11 08:24:37.949 INFO [stderr]    --> src/solver.rs:156:17
Dec 11 08:24:37.949 INFO [stderr]     |
Dec 11 08:24:37.949 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 11 08:24:37.950 INFO [stderr]     |                 ^^^^ help: consider using `_seen` instead
Dec 11 08:24:37.952 INFO [stderr]     |
Dec 11 08:24:37.952 INFO [stderr]     = note: #[warn(unused_variables)] on by default
Dec 11 08:24:37.952 INFO [stderr] 
Dec 11 08:24:37.952 INFO [stderr] warning: unused variable: `adjcts`
Dec 11 08:24:37.952 INFO [stderr]    --> src/solver.rs:158:17
Dec 11 08:24:37.952 INFO [stderr]     |
Dec 11 08:24:37.952 INFO [stderr] 158 |             let adjcts = board.adjacents(x, y);
Dec 11 08:24:37.952 INFO [stderr]     |                 ^^^^^^ help: consider using `_adjcts` instead
Dec 11 08:24:37.952 INFO [stderr] 
Dec 11 08:24:37.981 INFO [stderr] warning: variable does not need to be mutable
Dec 11 08:24:37.981 INFO [stderr]    --> src/solver.rs:154:13
Dec 11 08:24:37.981 INFO [stderr]     |
Dec 11 08:24:37.981 INFO [stderr] 154 |         let mut x = 0;
Dec 11 08:24:37.981 INFO [stderr]     |             ----^
Dec 11 08:24:37.981 INFO [stderr]     |             |
Dec 11 08:24:37.981 INFO [stderr]     |             help: remove this `mut`
Dec 11 08:24:37.981 INFO [stderr]     |
Dec 11 08:24:37.981 INFO [stderr]     = note: #[warn(unused_mut)] on by default
Dec 11 08:24:37.981 INFO [stderr] 
Dec 11 08:24:37.981 INFO [stderr] warning: variable does not need to be mutable
Dec 11 08:24:37.981 INFO [stderr]    --> src/solver.rs:155:13
Dec 11 08:24:37.981 INFO [stderr]     |
Dec 11 08:24:37.981 INFO [stderr] 155 |         let mut y = 0;
Dec 11 08:24:37.981 INFO [stderr]     |             ----^
Dec 11 08:24:37.981 INFO [stderr]     |             |
Dec 11 08:24:37.981 INFO [stderr]     |             help: remove this `mut`
Dec 11 08:24:37.981 INFO [stderr] 
Dec 11 08:24:37.981 INFO [stderr] warning: variable does not need to be mutable
Dec 11 08:24:37.981 INFO [stderr]    --> src/solver.rs:156:13
Dec 11 08:24:37.981 INFO [stderr]     |
Dec 11 08:24:37.981 INFO [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
Dec 11 08:24:37.981 INFO [stderr]     |             ----^^^^
Dec 11 08:24:37.981 INFO [stderr]     |             |
Dec 11 08:24:37.981 INFO [stderr]     |             help: remove this `mut`
Dec 11 08:24:37.981 INFO [stderr] 
Dec 11 08:24:37.984 INFO [stderr] warning: method is never used: `find_letter`
Dec 11 08:24:37.984 INFO [stderr]    --> src/solver.rs:149:5
Dec 11 08:24:37.984 INFO [stderr]     |
Dec 11 08:24:37.984 INFO [stderr] 149 |     fn find_letter(&self, chr: &AsciiChar) -> Option<&BTNode> {
Dec 11 08:24:37.984 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 08:24:37.984 INFO [stderr]     |
Dec 11 08:24:37.984 INFO [stderr]     = note: #[warn(dead_code)] on by default
Dec 11 08:24:37.984 INFO [stderr] 
Dec 11 08:24:38.568 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.45s
Dec 11 08:24:38.572 INFO [stderr] su: No module specific data is present
Dec 11 08:24:39.552 INFO running `"docker" "inspect" "ebc216f70dc982d4805a408ef92d1dc9912a60d99aad59e9b2a2478d654cc5bd"`
Dec 11 08:24:39.857 INFO running `"docker" "rm" "-f" "ebc216f70dc982d4805a408ef92d1dc9912a60d99aad59e9b2a2478d654cc5bd"`
Dec 11 08:24:40.204 INFO [stdout] ebc216f70dc982d4805a408ef92d1dc9912a60d99aad59e9b2a2478d654cc5bd