[INFO] crate puzzle-solver 0.4.1 is already in cache
[INFO] extracting crate puzzle-solver 0.4.1 into work/ex/beta-1.37-6/sources/1.36.0/reg/puzzle-solver/0.4.1
[INFO] extracting crate puzzle-solver 0.4.1 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/puzzle-solver/0.4.1
[INFO] validating manifest of puzzle-solver-0.4.1 on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of puzzle-solver-0.4.1 on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing puzzle-solver-0.4.1
[INFO] finished frobbing puzzle-solver-0.4.1
[INFO] frobbed toml for puzzle-solver-0.4.1 written to work/ex/beta-1.37-6/sources/1.36.0/reg/puzzle-solver/0.4.1/Cargo.toml
[INFO] started frobbing puzzle-solver-0.4.1
[INFO] finished frobbing puzzle-solver-0.4.1
[INFO] frobbed toml for puzzle-solver-0.4.1 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/puzzle-solver/0.4.1/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing puzzle-solver-0.4.1 against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/puzzle-solver/0.4.1:/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=warn" "-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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 6ff60af571da9f494ebdcc0fac7724c42c15f643f7949b84872d1ee5dfbe15ae
[INFO] running `"docker" "start" "-a" "6ff60af571da9f494ebdcc0fac7724c42c15f643f7949b84872d1ee5dfbe15ae"`
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling puzzle-solver v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:589:21
[INFO] [stderr]     |
[INFO] [stderr] 589 |                 let mut set = Rc::make_mut(rc);
[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/puzzle.rs:622:21
[INFO] [stderr]     |
[INFO] [stderr] 622 |                 let mut set = Rc::make_mut(rc);
[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/puzzle.rs:666:25
[INFO] [stderr]     |
[INFO] [stderr] 666 |                     let mut set = Rc::make_mut(rc);
[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/puzzle.rs:898:14
[INFO] [stderr]     |
[INFO] [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[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/puzzle.rs:898:21
[INFO] [stderr]     |
[INFO] [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.78s
[INFO] running `"docker" "inspect" "6ff60af571da9f494ebdcc0fac7724c42c15f643f7949b84872d1ee5dfbe15ae"`
[INFO] running `"docker" "rm" "-f" "6ff60af571da9f494ebdcc0fac7724c42c15f643f7949b84872d1ee5dfbe15ae"`
[INFO] [stdout] 6ff60af571da9f494ebdcc0fac7724c42c15f643f7949b84872d1ee5dfbe15ae
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/puzzle-solver/0.4.1:/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=warn" "-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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 831cf75ae44f93cd209d46128014a3b7ac06d453408018513c3b94a43f343005
[INFO] running `"docker" "start" "-a" "831cf75ae44f93cd209d46128014a3b7ac06d453408018513c3b94a43f343005"`
[INFO] [stderr]    Compiling puzzle-solver v0.4.1 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/puzzle.rs:589:21
[INFO] [stderr]     |
[INFO] [stderr] 589 |                 let mut set = Rc::make_mut(rc);
[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/puzzle.rs:622:21
[INFO] [stderr]     |
[INFO] [stderr] 622 |                 let mut set = Rc::make_mut(rc);
[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/puzzle.rs:666:25
[INFO] [stderr]     |
[INFO] [stderr] 666 |                     let mut set = Rc::make_mut(rc);
[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/puzzle.rs:898:14
[INFO] [stderr]     |
[INFO] [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[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/puzzle.rs:898:21
[INFO] [stderr]     |
[INFO] [stderr] 898 |         let (mut l, mut r) = slice.split_at_mut(b);
[INFO] [stderr]     |                     ----^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> tests/nonogram.rs:149:14
[INFO] [stderr]     |
[INFO] [stderr] 149 |         for (mut pos, &var) in trial.iter_mut().zip(&self.vars) {
[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]     Finished dev [unoptimized + debuginfo] target(s) in 6.62s
[INFO] running `"docker" "inspect" "831cf75ae44f93cd209d46128014a3b7ac06d453408018513c3b94a43f343005"`
[INFO] running `"docker" "rm" "-f" "831cf75ae44f93cd209d46128014a3b7ac06d453408018513c3b94a43f343005"`
[INFO] [stdout] 831cf75ae44f93cd209d46128014a3b7ac06d453408018513c3b94a43f343005
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/reg/puzzle-solver/0.4.1:/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=warn" "-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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] d408c8ef1ec9690340bdbcd7c052eca9f02a7a0d42c40774231ff109b7a60ef0
[INFO] running `"docker" "start" "-a" "d408c8ef1ec9690340bdbcd7c052eca9f02a7a0d42c40774231ff109b7a60ef0"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/puzzle_solver-c14f1c49fbb7c93a
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test constraint::alldifferent::tests::test_contradiction ... ok
[INFO] [stdout] test constraint::alldifferent::tests::test_constrain_by_value ... ok
[INFO] [stdout] test constraint::alldifferent::tests::test_contradiction_by_length ... ok
[INFO] [stdout] test constraint::unify::tests::test_unify_alldifferent ... ok
[INFO] [stdout] test linexpr::tests::test_coef_zero ... ok
[INFO] [stdout] test constraint::equality::tests::test_reduce_range ... ok
[INFO] [stdout] test constraint::equality::tests::test_assign ... ok
[INFO] [stdout] test constraint::equality::tests::test_contradiction ... ok
[INFO] [stdout] test constraint::alldifferent::tests::test_elimination ... ok
[INFO] [stdout] test linexpr::tests::test_ops ... ok
[INFO] [stdout] test puzzle::tests::test_no_vars ... ok
[INFO] [stdout] test constraint::unify::tests::test_unify_equality ... ok
[INFO] [stdout] test constraint::unify::tests::test_unify_unify ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hidato-7d2d63b902139b3e
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test hidato_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/kakuro-5e968a5f8b94fbc4
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test kakuro_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/killersudoku-a9ba279f7880bf59
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test killersudoku_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/magicsquare-98da741d7a60c863
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test magicsquare_3x3 ... ok
[INFO] [stdout] test magicsquare_4x4 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/nonogram-c096d6122b82ddbd
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test nonogram_wikipedia ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/queens-70e68e8f07165378
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test queens_4x4 ... ok
[INFO] [stdout] test queens_5x5 ... ok
[INFO] [stdout] test queens_6x6 ... ok
[INFO] [stdout] test queens_7x7 ... ok
[INFO] [stdout] test queens_8x8 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/samuraisudoku-de6e1e35b2c494c7
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test samuraisudoku_easy ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sendmoremoney-1ae055ae3109f660
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test sendmoremoney_naive ... ok
[INFO] [stdout] test sendmoremoney_carry ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sudoku-03292b94eab25ad5
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test sudoku_wikipedia ... ok
[INFO] [stdout] test sudoku_hardest ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/sujiko-302af24503b1b615
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test sujiko_simetric ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/takuzu-e202c0945a09d958
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test takuzu_grid1 ... ok
[INFO] [stdout] test takuzu_grid2 ... ok
[INFO] [stdout] test takuzu_grid3 ... ok
[INFO] [stdout] test takuzu_grid4 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/xkcd-b2ad77491eb2b838
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test xkcd_knapsack ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/zebra-c0364ebe49eabe19
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test zebra ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests puzzle-solver
[INFO] [stdout] 
[INFO] [stdout] running 18 tests
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::intersect_candidates (line 272) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::insert_candidates (line 208) ... ok
[INFO] [stdout] test src/constraint/equality.rs - constraint::equality::Equality::new (line 19) ... ok
[INFO] [stdout] test src/constraint/unify.rs - constraint::unify::Unify::new (line 18) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new (line 97) ... ok
[INFO] [stdout] test src/constraint/alldifferent.rs - constraint::alldifferent::AllDifferent::new (line 17) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::all_different (line 308) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::equals (line 324) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_var (line 114) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_var_with_candidates (line 130) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_vars_with_candidates_1d (line 145) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::new_vars_with_candidates_2d (line 163) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::remove_candidates (line 239) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::solve_unique (line 382) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::solve_any (line 357) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::set_value (line 185) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::solve_all (line 408) ... ok
[INFO] [stdout] test src/puzzle.rs - puzzle::Puzzle::unify (line 340) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 18 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "d408c8ef1ec9690340bdbcd7c052eca9f02a7a0d42c40774231ff109b7a60ef0"`
[INFO] running `"docker" "rm" "-f" "d408c8ef1ec9690340bdbcd7c052eca9f02a7a0d42c40774231ff109b7a60ef0"`
[INFO] [stdout] d408c8ef1ec9690340bdbcd7c052eca9f02a7a0d42c40774231ff109b7a60ef0