[INFO] fetching crate round_robin 1.0.0...
[INFO] testing round_robin-1.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate round_robin 1.0.0 into /workspace/builds/worker-60/source
[INFO] validating manifest of crates.io crate round_robin 1.0.0 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 round_robin 1.0.0
[INFO] finished tweaking crates.io crate round_robin 1.0.0
[INFO] tweaked toml for crates.io crate round_robin 1.0.0 written to /workspace/builds/worker-60/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-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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] c5bad1f685e73b7506ea5c5002b85432b1715976ff3d3afcf52f01c24909c2f7
[INFO] running `Command { std: "docker" "start" "-a" "c5bad1f685e73b7506ea5c5002b85432b1715976ff3d3afcf52f01c24909c2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c5bad1f685e73b7506ea5c5002b85432b1715976ff3d3afcf52f01c24909c2f7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c5bad1f685e73b7506ea5c5002b85432b1715976ff3d3afcf52f01c24909c2f7", kill_on_drop: false }`
[INFO] [stdout] c5bad1f685e73b7506ea5c5002b85432b1715976ff3d3afcf52f01c24909c2f7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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] 65847cf18138327948cc1be88c5b9ee01256d1045a16105def2971c67c1921a1
[INFO] running `Command { std: "docker" "start" "-a" "65847cf18138327948cc1be88c5b9ee01256d1045a16105def2971c67c1921a1", kill_on_drop: false }`
[INFO] [stderr]    Compiling round_robin v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "65847cf18138327948cc1be88c5b9ee01256d1045a16105def2971c67c1921a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65847cf18138327948cc1be88c5b9ee01256d1045a16105def2971c67c1921a1", kill_on_drop: false }`
[INFO] [stdout] 65847cf18138327948cc1be88c5b9ee01256d1045a16105def2971c67c1921a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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] 162d678a32eaba20fe0ac474f476a4f39204fb0221c1b5f468de71861e18c2b9
[INFO] running `Command { std: "docker" "start" "-a" "162d678a32eaba20fe0ac474f476a4f39204fb0221c1b5f468de71861e18c2b9", kill_on_drop: false }`
[INFO] [stderr]    Compiling round_robin v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "162d678a32eaba20fe0ac474f476a4f39204fb0221c1b5f468de71861e18c2b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "162d678a32eaba20fe0ac474f476a4f39204fb0221c1b5f468de71861e18c2b9", kill_on_drop: false }`
[INFO] [stdout] 162d678a32eaba20fe0ac474f476a4f39204fb0221c1b5f468de71861e18c2b9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-60/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] 78e3241e95b91f4aa4841ebadfe6a4060c588e5869feea066e0e3057d2a4bb6e
[INFO] running `Command { std: "docker" "start" "-a" "78e3241e95b91f4aa4841ebadfe6a4060c588e5869feea066e0e3057d2a4bb6e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::first_game_of_first_round_is_first_player_versus_last_player ... ok
[INFO] [stdout] test tests::first_game_of_last_round_is_first_player_versus_second_player ... ok
[INFO] [stdout] test tests::number_rounds_with_round_trip ... ok
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/round_robin-effadfa4bd2c5fb5)
[INFO] [stdout] test tests::number_games_per_round ... ok
[INFO] [stdout] test tests::number_rounds_without_round_trip ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests round_robin
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] [stdout] test src/lib.rs - round_robin (line 24) ... FAILED
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- src/lib.rs - round_robin (line 24) stdout ----
[INFO] [stdout] error[E0423]: expected function, found crate `round_robin`
[INFO] [stdout]  --> src/lib.rs:25:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | round_robin(vec!["A".to_string(), "B".to_string(), "C".to_string(), "D".to_string()], false);
[INFO] [stdout]   | ^^^^^^^^^^^ not a function
[INFO] [stdout]   |
[INFO] [stdout] help: consider importing this function instead
[INFO] [stdout]   |
[INFO] [stdout] 3 | use round_robin::round_robin;
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0423`.
[INFO] [stdout] Couldn't compile the test.
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     src/lib.rs - round_robin (line 24)
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.18s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "78e3241e95b91f4aa4841ebadfe6a4060c588e5869feea066e0e3057d2a4bb6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e3241e95b91f4aa4841ebadfe6a4060c588e5869feea066e0e3057d2a4bb6e", kill_on_drop: false }`
[INFO] [stdout] 78e3241e95b91f4aa4841ebadfe6a4060c588e5869feea066e0e3057d2a4bb6e