[INFO] fetching crate sudoku-solver 0.3.0...
[INFO] testing sudoku-solver-0.3.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate sudoku-solver 0.3.0 into /workspace/builds/worker-49/source
[INFO] validating manifest of crates.io crate sudoku-solver 0.3.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sudoku-solver 0.3.0
[INFO] finished tweaking crates.io crate sudoku-solver 0.3.0
[INFO] tweaked toml for crates.io crate sudoku-solver 0.3.0 written to /workspace/builds/worker-49/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 12176af3ca07da9e354a8f30242ad4574cd0d1eea1a1c95917b81a31eed1e91e
[INFO] running `Command { std: "docker" "start" "-a" "12176af3ca07da9e354a8f30242ad4574cd0d1eea1a1c95917b81a31eed1e91e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "12176af3ca07da9e354a8f30242ad4574cd0d1eea1a1c95917b81a31eed1e91e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12176af3ca07da9e354a8f30242ad4574cd0d1eea1a1c95917b81a31eed1e91e", kill_on_drop: false }`
[INFO] [stdout] 12176af3ca07da9e354a8f30242ad4574cd0d1eea1a1c95917b81a31eed1e91e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec91f3237ff5c9d79723116e508cd7865058bf16f653411778918b1839b313f8
[INFO] running `Command { std: "docker" "start" "-a" "ec91f3237ff5c9d79723116e508cd7865058bf16f653411778918b1839b313f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling bit-iter v0.1.5
[INFO] [stderr]    Compiling sudoku-solver v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "ec91f3237ff5c9d79723116e508cd7865058bf16f653411778918b1839b313f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec91f3237ff5c9d79723116e508cd7865058bf16f653411778918b1839b313f8", kill_on_drop: false }`
[INFO] [stdout] ec91f3237ff5c9d79723116e508cd7865058bf16f653411778918b1839b313f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a6ca325f609c420db75450799e320421d257f24dbcffbcbf8802bacfa0d08b5a
[INFO] running `Command { std: "docker" "start" "-a" "a6ca325f609c420db75450799e320421d257f24dbcffbcbf8802bacfa0d08b5a", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling sudoku-solver v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 24.19s
[INFO] running `Command { std: "docker" "inspect" "a6ca325f609c420db75450799e320421d257f24dbcffbcbf8802bacfa0d08b5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a6ca325f609c420db75450799e320421d257f24dbcffbcbf8802bacfa0d08b5a", kill_on_drop: false }`
[INFO] [stdout] a6ca325f609c420db75450799e320421d257f24dbcffbcbf8802bacfa0d08b5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f5450c45aa98b71333cf2d26d6aff146a24d84df7451d96b798915289ee1749e
[INFO] running `Command { std: "docker" "start" "-a" "f5450c45aa98b71333cf2d26d6aff146a24d84df7451d96b798915289ee1749e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sudoku_solver-d5d5503583d811c6)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test board::tests::string_rep_of_board_is_correct ... ok
[INFO] [stdout] test solver::tests::duplicate_in_column_is_detected ... ok
[INFO] [stdout] test solver::tests::duplicate_in_row_is_detected ... ok
[INFO] [stdout] test solver::tests::duplicate_in_square_is_detected ... ok
[INFO] [stdout] test solver::tests::invalid_cell_values_are_detected ... ok
[INFO] [stdout] test solver::tests::valid_board_is_passed ... ok
[INFO] [stdout] test solver::tests::detects_unsolvable_puzzles ... ok
[INFO] [stdout] test solver::tests::finds_multiple_solutions ... ok
[INFO] [stderr]    Doc-tests sudoku-solver
[INFO] [stdout] test solver::tests::solves_solvable_puzzles ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.53s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test src/board/mod.rs - board::Board::with_cell (line 77) ... ok
[INFO] [stdout] test src/solver/mod.rs - solver::valid (line 24) ... ok
[INFO] [stdout] test src/board/mod.rs - board::Board::get_cell (line 32) ... ok
[INFO] [stdout] test src/lib.rs - (line 36) ... ok
[INFO] [stdout] test src/board/mod.rs - board::Board::set_cell (line 58) ... ok
[INFO] [stdout] test src/solver/mod.rs - solver::solve (line 163) ... ok
[INFO] [stdout] test src/solver/mod.rs - solver::SolutionIter::new (line 247) ... ok
[INFO] [stdout] test src/board/mod.rs - board::Board::from (line 100) ... ok
[INFO] [stdout] test src/solver/mod.rs - solver::SolutionIter (line 193) ... ok
[INFO] [stdout] test src/lib.rs - (line 10) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 10 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.77s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f5450c45aa98b71333cf2d26d6aff146a24d84df7451d96b798915289ee1749e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5450c45aa98b71333cf2d26d6aff146a24d84df7451d96b798915289ee1749e", kill_on_drop: false }`
[INFO] [stdout] f5450c45aa98b71333cf2d26d6aff146a24d84df7451d96b798915289ee1749e