[INFO] cloning repository swizzard/boggler
[INFO] running `"git" "clone" "--bare" "git://github.com/swizzard/boggler.git" "work/cache/sources/gh/swizzard/boggler"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/swizzard/boggler'...
[INFO] running `"git" "clone" "work/cache/sources/gh/swizzard/boggler" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/swizzard/boggler"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/swizzard/boggler'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/swizzard/boggler" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/swizzard/boggler"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/swizzard/boggler'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] cc01442ec61024df5448d8460f06d2fcdd7e2531
[INFO] sha for GitHub repo swizzard/boggler: cc01442ec61024df5448d8460f06d2fcdd7e2531
[INFO] validating manifest of swizzard/boggler on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of swizzard/boggler on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing swizzard/boggler
[INFO] finished frobbing swizzard/boggler
[INFO] frobbed toml for swizzard/boggler written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/swizzard/boggler/Cargo.toml
[INFO] started frobbing swizzard/boggler
[INFO] finished frobbing swizzard/boggler
[INFO] frobbed toml for swizzard/boggler written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/swizzard/boggler/Cargo.toml
[INFO] crate swizzard/boggler already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing swizzard/boggler against master#c8865d8e195813ade6b84434ac9f8850e7112d1a for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "build" "--frozen"`
[INFO] [stdout] 91fff19f335004bc972cd9bf9c52d74fec211a8d45da89ef6e5af240e2e313fe
[INFO] running `"docker" "start" "-a" "91fff19f335004bc972cd9bf9c52d74fec211a8d45da89ef6e5af240e2e313fe"`
[INFO] [stderr]    Compiling ascii v0.8.7
[INFO] [stderr]    Compiling rand v0.5.1
[INFO] [stderr]    Compiling boggler v0.1.0 (/opt/crater/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 8.66s
[INFO] running `"docker" "inspect" "91fff19f335004bc972cd9bf9c52d74fec211a8d45da89ef6e5af240e2e313fe"`
[INFO] running `"docker" "rm" "-f" "91fff19f335004bc972cd9bf9c52d74fec211a8d45da89ef6e5af240e2e313fe"`
[INFO] [stdout] 91fff19f335004bc972cd9bf9c52d74fec211a8d45da89ef6e5af240e2e313fe
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7de4f2e3ce82be915bc17bf0fb3a8d97369cee29f432a994e58ba3e48f734906
[INFO] running `"docker" "start" "-a" "7de4f2e3ce82be915bc17bf0fb3a8d97369cee29f432a994e58ba3e48f734906"`
[INFO] [stderr]    Compiling boggler v0.1.0 (/opt/crater/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 1.74s
[INFO] running `"docker" "inspect" "7de4f2e3ce82be915bc17bf0fb3a8d97369cee29f432a994e58ba3e48f734906"`
[INFO] running `"docker" "rm" "-f" "7de4f2e3ce82be915bc17bf0fb3a8d97369cee29f432a994e58ba3e48f734906"`
[INFO] [stdout] 7de4f2e3ce82be915bc17bf0fb3a8d97369cee29f432a994e58ba3e48f734906
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-5/master#c8865d8e195813ade6b84434ac9f8850e7112d1a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/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" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "test" "--frozen"`
[INFO] [stdout] a195bc168a5a1b8fea84b5a85b3abc17bbec1d0c233085d5e16c74eb86201032
[INFO] running `"docker" "start" "-a" "a195bc168a5a1b8fea84b5a85b3abc17bbec1d0c233085d5e16c74eb86201032"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/boggler-7fd1810fb7ee464b
[INFO] [stdout] 
[INFO] [stdout] running 16 tests
[INFO] [stdout] test board::test::test_adjacents_middle ... ok
[INFO] [stdout] test board::test::test_adjacents_left_side ... ok
[INFO] [stdout] test board::test::test_adjacents_right_side ... ok
[INFO] [stdout] test board::test::test_adjacents_top ... ok
[INFO] [stdout] test solver::test::count_word_q ... ok
[INFO] [stdout] test board::test::test_adjacents_bottom ... 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 board::test::test_adjacents_upper_left_corner ... ok
[INFO] [stdout] test solver::test::count_word_u_no_q ... ok
[INFO] [stdout] test solver::test::prepare_word_lowercase ... ok
[INFO] [stdout] test solver::test::new_one_word ... ok
[INFO] [stdout] test solver::test::find_letter ... ok
[INFO] [stdout] test solver::test::new_empty ... ok
[INFO] [stdout] test solver::test::two_new_words ... ok
[INFO] [stdout] test solver::test::find ... 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/crater/target/debug/deps/boggler-f9e76f90759dc443
[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" "a195bc168a5a1b8fea84b5a85b3abc17bbec1d0c233085d5e16c74eb86201032"`
[INFO] running `"docker" "rm" "-f" "a195bc168a5a1b8fea84b5a85b3abc17bbec1d0c233085d5e16c74eb86201032"`
[INFO] [stdout] a195bc168a5a1b8fea84b5a85b3abc17bbec1d0c233085d5e16c74eb86201032