[INFO] updating cached repository https://github.com/czipperz/rubick
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7e287b723bc2ebd94a844d9aec4c7af605dad81e
[INFO] testing czipperz/rubick against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fczipperz%2Frubick" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/czipperz/rubick on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/czipperz/rubick
[INFO] finished tweaking git repo https://github.com/czipperz/rubick
[INFO] tweaked toml for git repo https://github.com/czipperz/rubick written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/czipperz/rubick already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 96ee8ec1aa8ff7753bea74deefc0c91cb8398f15fe10e0c08a74489374539a50
[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" "96ee8ec1aa8ff7753bea74deefc0c91cb8398f15fe10e0c08a74489374539a50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "96ee8ec1aa8ff7753bea74deefc0c91cb8398f15fe10e0c08a74489374539a50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96ee8ec1aa8ff7753bea74deefc0c91cb8398f15fe10e0c08a74489374539a50", kill_on_drop: false }`
[INFO] [stdout] 96ee8ec1aa8ff7753bea74deefc0c91cb8398f15fe10e0c08a74489374539a50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee24063b31d0934bab63d49e804f8d7100a05d164e3494f33c22ab49bf665f56
[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" "ee24063b31d0934bab63d49e804f8d7100a05d164e3494f33c22ab49bf665f56", kill_on_drop: false }`
[INFO] [stderr]    Compiling rubick v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `rotate_random`
[INFO] [stdout]    --> src/cube.rs:143:12
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn rotate_random(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `num_bottom_solved`
[INFO] [stdout]  --> src/predicates.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn num_bottom_solved(cube: &Cube) -> usize {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/predicates.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |         .into_iter().filter(|x| **x).count()
[INFO] [stdout]    |          ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "ee24063b31d0934bab63d49e804f8d7100a05d164e3494f33c22ab49bf665f56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee24063b31d0934bab63d49e804f8d7100a05d164e3494f33c22ab49bf665f56", kill_on_drop: false }`
[INFO] [stdout] ee24063b31d0934bab63d49e804f8d7100a05d164e3494f33c22ab49bf665f56
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 185328f843b4f005d932dfff030b0383fe766ec9025e6b299decf3c058879878
[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" "185328f843b4f005d932dfff030b0383fe766ec9025e6b299decf3c058879878", kill_on_drop: false }`
[INFO] [stderr]    Compiling rubick v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `rotate_random`
[INFO] [stdout]    --> src/cube.rs:143:12
[INFO] [stdout]     |
[INFO] [stdout] 143 |     pub fn rotate_random(&mut self) {
[INFO] [stdout]     |            ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stdout]   --> src/predicates.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |         .into_iter().filter(|x| **x).count()
[INFO] [stdout]    |          ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.48s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "185328f843b4f005d932dfff030b0383fe766ec9025e6b299decf3c058879878", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "185328f843b4f005d932dfff030b0383fe766ec9025e6b299decf3c058879878", kill_on_drop: false }`
[INFO] [stdout] 185328f843b4f005d932dfff030b0383fe766ec9025e6b299decf3c058879878
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7a3a5157238eef7f73f0f6a2239d00b9ef8facfe3a78ca788a009b860cff7d94
[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" "7a3a5157238eef7f73f0f6a2239d00b9ef8facfe3a78ca788a009b860cff7d94", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: associated function is never used: `rotate_random`
[INFO] [stdout] running 15 tests
[INFO] [stderr]    --> src/cube.rs:143:12
[INFO] [stderr]     |
[INFO] [stderr] 143 |     pub fn rotate_random(&mut self) {
[INFO] [stderr]     |            ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: this method call currently resolves to `<&[T; N] as IntoIterator>::into_iter` (due to autoref coercions), but that might change in the future when `IntoIterator` impls for arrays are added.
[INFO] [stderr]   --> src/predicates.rs:15:10
[INFO] [stderr]    |
[INFO] [stderr] 15 |         .into_iter().filter(|x| **x).count()
[INFO] [stderr]    |          ^^^^^^^^^ help: use `.iter()` instead of `.into_iter()` to avoid ambiguity: `iter`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stderr]    = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stderr]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/rubick-e7f9b7522542167b
[INFO] [stdout] test cube::test::test_new ... ok
[INFO] [stdout] test cube::test::test_rotate_right_counter_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_right_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_left_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_front_counter_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_front_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_bottom_counter_clockwise ... ok
[INFO] [stdout] test cube::test::rotate_back_counter_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_back_clockwise ... ok
[INFO] [stdout] test cube::test::test_display ... ok
[INFO] [stdout] test cube::test::test_rotate_top_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_left_counter_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_top_counter_clockwise ... ok
[INFO] [stdout] test cube::test::test_rotate_bottom_clockwise ... ok
[INFO] [stdout] test predicates::test::test_num_bottom_solved ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 15 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7a3a5157238eef7f73f0f6a2239d00b9ef8facfe3a78ca788a009b860cff7d94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a3a5157238eef7f73f0f6a2239d00b9ef8facfe3a78ca788a009b860cff7d94", kill_on_drop: false }`
[INFO] [stdout] 7a3a5157238eef7f73f0f6a2239d00b9ef8facfe3a78ca788a009b860cff7d94