[INFO] fetching crate union-find 0.3.2...
[INFO] testing union-find-0.3.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate union-find 0.3.2 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate union-find 0.3.2 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate union-find 0.3.2
[INFO] finished tweaking crates.io crate union-find 0.3.2
[INFO] tweaked toml for crates.io crate union-find 0.3.2 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e5a9056660b6d07ab892ef99cbab17ae66eef9e434bad5ceeb5439fe3987c756
[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" "e5a9056660b6d07ab892ef99cbab17ae66eef9e434bad5ceeb5439fe3987c756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e5a9056660b6d07ab892ef99cbab17ae66eef9e434bad5ceeb5439fe3987c756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e5a9056660b6d07ab892ef99cbab17ae66eef9e434bad5ceeb5439fe3987c756", kill_on_drop: false }`
[INFO] [stdout] e5a9056660b6d07ab892ef99cbab17ae66eef9e434bad5ceeb5439fe3987c756
[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" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fe8da9265dce3f0b4031019c4b32a4e6ee69fede6b8ea3929d5014da7733da8
[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" "8fe8da9265dce3f0b4031019c4b32a4e6ee69fede6b8ea3929d5014da7733da8", kill_on_drop: false }`
[INFO] [stderr]    Compiling union-find v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "8fe8da9265dce3f0b4031019c4b32a4e6ee69fede6b8ea3929d5014da7733da8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fe8da9265dce3f0b4031019c4b32a4e6ee69fede6b8ea3929d5014da7733da8", kill_on_drop: false }`
[INFO] [stdout] 8fe8da9265dce3f0b4031019c4b32a4e6ee69fede6b8ea3929d5014da7733da8
[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" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c71e8dcc4cfa2cd670fb4014a5f13d01350dcdcb90e8a3a47e86d71749bfa4bc
[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" "c71e8dcc4cfa2cd670fb4014a5f13d01350dcdcb90e8a3a47e86d71749bfa4bc", kill_on_drop: false }`
[INFO] [stderr]    Compiling union-find v0.3.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `Command { std: "docker" "inspect" "c71e8dcc4cfa2cd670fb4014a5f13d01350dcdcb90e8a3a47e86d71749bfa4bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c71e8dcc4cfa2cd670fb4014a5f13d01350dcdcb90e8a3a47e86d71749bfa4bc", kill_on_drop: false }`
[INFO] [stdout] c71e8dcc4cfa2cd670fb4014a5f13d01350dcdcb90e8a3a47e86d71749bfa4bc
[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" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 1acf2ba3f0eeea51963ab817c07e3ccc3c78049b0a396ad943563bf1fb886e5f
[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" "1acf2ba3f0eeea51963ab817c07e3ccc3c78049b0a396ad943563bf1fb886e5f", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/union_find-4bb95c39cb019bce
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::quick_union::union_find ... ok
[INFO] [stderr]    Doc-tests union-find
[INFO] [stdout] test tests::quick_find::union_find ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1acf2ba3f0eeea51963ab817c07e3ccc3c78049b0a396ad943563bf1fb886e5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1acf2ba3f0eeea51963ab817c07e3ccc3c78049b0a396ad943563bf1fb886e5f", kill_on_drop: false }`
[INFO] [stdout] 1acf2ba3f0eeea51963ab817c07e3ccc3c78049b0a396ad943563bf1fb886e5f