[INFO] updating cached repository https://github.com/swizzard/boggler
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cc01442ec61024df5448d8460f06d2fcdd7e2531
[INFO] testing swizzard/boggler against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fswizzard%2Fboggler" "work/builds/worker-7/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/swizzard/boggler on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/swizzard/boggler
[INFO] finished tweaking git repo https://github.com/swizzard/boggler
[INFO] tweaked toml for git repo https://github.com/swizzard/boggler written to work/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/swizzard/boggler already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] fcb52c7b455ff534bf2065f3aefa15bfc5029ba9fe355d24830b028602464f3b
[INFO] running `"docker" "start" "-a" "fcb52c7b455ff534bf2065f3aefa15bfc5029ba9fe355d24830b028602464f3b"`
[INFO] [stderr]    Compiling rand v0.5.1
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling boggler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `seen`
[INFO] [stderr]    --> src/solver.rs:156:17
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_seen`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `adjcts`
[INFO] [stderr]    --> src/solver.rs:158:17
[INFO] [stderr]     |
[INFO] [stderr] 158 |             let adjcts = board.adjacents(x, y);
[INFO] [stderr]     |                 ^^^^^^ help: consider prefixing with an underscore: `_adjcts`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/solver.rs:154:13
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let mut x = 0;
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/solver.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |         let mut y = 0;
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/solver.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `find_letter`
[INFO] [stderr]    --> src/solver.rs:149:5
[INFO] [stderr]     |
[INFO] [stderr] 149 |     fn find_letter(&self, chr: &AsciiChar) -> Option<&BTNode> {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.05s
[INFO] running `"docker" "inspect" "fcb52c7b455ff534bf2065f3aefa15bfc5029ba9fe355d24830b028602464f3b"`
[INFO] running `"docker" "rm" "-f" "fcb52c7b455ff534bf2065f3aefa15bfc5029ba9fe355d24830b028602464f3b"`
[INFO] [stdout] fcb52c7b455ff534bf2065f3aefa15bfc5029ba9fe355d24830b028602464f3b
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2a81560f1e7a4557fba701fc30a94264f3831bd553b1d877a413820204d7332f
[INFO] running `"docker" "start" "-a" "2a81560f1e7a4557fba701fc30a94264f3831bd553b1d877a413820204d7332f"`
[INFO] [stderr]    Compiling boggler v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `seen`
[INFO] [stderr]    --> src/solver.rs:156:17
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_seen`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `adjcts`
[INFO] [stderr]    --> src/solver.rs:158:17
[INFO] [stderr]     |
[INFO] [stderr] 158 |             let adjcts = board.adjacents(x, y);
[INFO] [stderr]     |                 ^^^^^^ help: consider prefixing with an underscore: `_adjcts`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/solver.rs:154:13
[INFO] [stderr]     |
[INFO] [stderr] 154 |         let mut x = 0;
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/solver.rs:155:13
[INFO] [stderr]     |
[INFO] [stderr] 155 |         let mut y = 0;
[INFO] [stderr]     |             ----^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/solver.rs:156:13
[INFO] [stderr]     |
[INFO] [stderr] 156 |         let mut seen: HashSet<BoardPosition> = HashSet::with_capacity(16);
[INFO] [stderr]     |             ----^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "2a81560f1e7a4557fba701fc30a94264f3831bd553b1d877a413820204d7332f"`
[INFO] running `"docker" "rm" "-f" "2a81560f1e7a4557fba701fc30a94264f3831bd553b1d877a413820204d7332f"`
[INFO] [stdout] 2a81560f1e7a4557fba701fc30a94264f3831bd553b1d877a413820204d7332f
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.38.0" "test" "--frozen"`
[INFO] [stdout] f73cbd29ce9399cb58fedfdf100e6621f4e0c317714082b6e8f69b4d8035d06b
[INFO] running `"docker" "start" "-a" "f73cbd29ce9399cb58fedfdf100e6621f4e0c317714082b6e8f69b4d8035d06b"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/boggler-fb36f1c9775586f6
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test board::test::test_adjacents_bottom ... ok
[INFO] [stdout] test board::test::test_adjacents_left_side ... ok
[INFO] [stdout] test board::test::test_adjacents_middle ... ok
[INFO] [stdout] test board::test::test_adjacents_right_side ... ok
[INFO] [stdout] test board::test::test_adjacents_upper_left_corner ... ok
[INFO] [stdout] test board::test::test_adjacents_top ... ok
[INFO] [stdout] test board::test::test_adjacents_upper_right_corner ... ok
[INFO] [stdout] test solver::test::count_word_no_q ... ok
[INFO] [stdout] test solver::test::count_word_q ... ok
[INFO] [stdout] test solver::test::count_word_u_no_q ... ok
[INFO] [stdout] test solver::test::new_empty ... ok
[INFO] [stdout] test solver::test::find_letter ... ok
[INFO] [stdout] test solver::test::new_one_word ... ok
[INFO] [stdout] test solver::test::find ... ok
[INFO] [stdout] test solver::test::prepare_word_lowercase ... ok
[INFO] [stdout] test solver::test::two_new_words ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/boggler-9414fa0cad66d8b2
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests boggler
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "f73cbd29ce9399cb58fedfdf100e6621f4e0c317714082b6e8f69b4d8035d06b"`
[INFO] running `"docker" "rm" "-f" "f73cbd29ce9399cb58fedfdf100e6621f4e0c317714082b6e8f69b4d8035d06b"`
[INFO] [stdout] f73cbd29ce9399cb58fedfdf100e6621f4e0c317714082b6e8f69b4d8035d06b