[INFO] fetching crate lights-out 0.1.0...
[INFO] testing lights-out-0.1.0 against 1.49.0 for beta-1.50-1
[INFO] extracting crate lights-out 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate lights-out 0.1.0 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lights-out 0.1.0
[INFO] finished tweaking crates.io crate lights-out 0.1.0
[INFO] tweaked toml for crates.io crate lights-out 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d66f2890be4ac6c7dcdb3099a728d19a7275e80eb9c14423f226d949e417c23d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d66f2890be4ac6c7dcdb3099a728d19a7275e80eb9c14423f226d949e417c23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d66f2890be4ac6c7dcdb3099a728d19a7275e80eb9c14423f226d949e417c23d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d66f2890be4ac6c7dcdb3099a728d19a7275e80eb9c14423f226d949e417c23d", kill_on_drop: false }`
[INFO] [stdout] d66f2890be4ac6c7dcdb3099a728d19a7275e80eb9c14423f226d949e417c23d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 192a37b6048caf5f564641f3688b2a55b37129f4b1b3aa1ccb44ec1ead314462
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "192a37b6048caf5f564641f3688b2a55b37129f4b1b3aa1ccb44ec1ead314462", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling lights-out v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solvers/state2.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(sx: usize, sy: usize) -> StructLevel {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve`
[INFO] [stdout]   --> src/solvers/state2.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gauss_jordan_zf2`
[INFO] [stdout]    --> src/solvers/state2.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "192a37b6048caf5f564641f3688b2a55b37129f4b1b3aa1ccb44ec1ead314462", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "192a37b6048caf5f564641f3688b2a55b37129f4b1b3aa1ccb44ec1ead314462", kill_on_drop: false }`
[INFO] [stdout] 192a37b6048caf5f564641f3688b2a55b37129f4b1b3aa1ccb44ec1ead314462
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6aef5bbc2414c9922863cd4bcf44a535046b8dcf8dfec294b95b740570d02595
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6aef5bbc2414c9922863cd4bcf44a535046b8dcf8dfec294b95b740570d02595", kill_on_drop: false }`
[INFO] [stderr]    Compiling lights-out v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/solvers/state2.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn new(sx: usize, sy: usize) -> StructLevel {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `solve`
[INFO] [stdout]   --> src/solvers/state2.rs:89:8
[INFO] [stdout]    |
[INFO] [stdout] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gauss_jordan_zf2`
[INFO] [stdout]    --> src/solvers/state2.rs:125:4
[INFO] [stdout]     |
[INFO] [stdout] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.34s
[INFO] running `Command { std: "docker" "inspect" "6aef5bbc2414c9922863cd4bcf44a535046b8dcf8dfec294b95b740570d02595", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6aef5bbc2414c9922863cd4bcf44a535046b8dcf8dfec294b95b740570d02595", kill_on_drop: false }`
[INFO] [stdout] 6aef5bbc2414c9922863cd4bcf44a535046b8dcf8dfec294b95b740570d02595
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ce205cd498df06cc25a4336d5d57583e6e73444331f23d5e8b0329d2093b423b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ce205cd498df06cc25a4336d5d57583e6e73444331f23d5e8b0329d2093b423b", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `new`
[INFO] [stderr]   --> src/solvers/state2.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 |     pub fn new(sx: usize, sy: usize) -> StructLevel {
[INFO] [stderr]    |            ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]   --> src/solvers/state2.rs:89:8
[INFO] [stderr]    |
[INFO] [stderr] 89 | pub fn solve(level: &StructLevel) -> Option<Vec<(usize, usize)>> {
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gauss_jordan_zf2`
[INFO] [stderr]    --> src/solvers/state2.rs:125:4
[INFO] [stderr]     |
[INFO] [stderr] 125 | fn gauss_jordan_zf2(mat: Vec<Vec<usize>>, expected: Vec<usize>) -> Option<Vec<usize>> {
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/lights_out-9937615732b4138b
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests lights-out
[INFO] [stdout] running 1 test
[INFO] [stdout] test solvers::state2::test ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[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 `Command { std: "docker" "inspect" "ce205cd498df06cc25a4336d5d57583e6e73444331f23d5e8b0329d2093b423b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce205cd498df06cc25a4336d5d57583e6e73444331f23d5e8b0329d2093b423b", kill_on_drop: false }`
[INFO] [stdout] ce205cd498df06cc25a4336d5d57583e6e73444331f23d5e8b0329d2093b423b