[INFO] fetching crate task-group 0.2.0...
[INFO] testing task-group-0.2.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate task-group 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate task-group 0.2.0 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 task-group 0.2.0
[INFO] finished tweaking crates.io crate task-group 0.2.0
[INFO] tweaked toml for crates.io crate task-group 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate task-group 0.2.0 already has a lockfile, it will not be regenerated
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] c24114d0dba276f0ea3165db746f00e9215875833fd4d5e2771185ba292576ed
[INFO] running `Command { std: "docker" "start" "-a" "c24114d0dba276f0ea3165db746f00e9215875833fd4d5e2771185ba292576ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c24114d0dba276f0ea3165db746f00e9215875833fd4d5e2771185ba292576ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c24114d0dba276f0ea3165db746f00e9215875833fd4d5e2771185ba292576ed", kill_on_drop: false }`
[INFO] [stdout] c24114d0dba276f0ea3165db746f00e9215875833fd4d5e2771185ba292576ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] a3b2c371c81ce49b9939369ebee248a890a6d7eba780a81ef2bebbbe79f7bc4a
[INFO] running `Command { std: "docker" "start" "-a" "a3b2c371c81ce49b9939369ebee248a890a6d7eba780a81ef2bebbbe79f7bc4a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling lock_api v0.4.2
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling tokio-macros v1.1.0
[INFO] [stderr]    Compiling tokio v1.4.0
[INFO] [stderr]    Compiling task-group v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.10s
[INFO] running `Command { std: "docker" "inspect" "a3b2c371c81ce49b9939369ebee248a890a6d7eba780a81ef2bebbbe79f7bc4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3b2c371c81ce49b9939369ebee248a890a6d7eba780a81ef2bebbbe79f7bc4a", kill_on_drop: false }`
[INFO] [stdout] a3b2c371c81ce49b9939369ebee248a890a6d7eba780a81ef2bebbbe79f7bc4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] e6e46f2ee5fa23c930c6c839cd80f83e6fbdd73252eeea3334023df06f173e68
[INFO] running `Command { std: "docker" "start" "-a" "e6e46f2ee5fa23c930c6c839cd80f83e6fbdd73252eeea3334023df06f173e68", kill_on_drop: false }`
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling task-group v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 6.88s
[INFO] running `Command { std: "docker" "inspect" "e6e46f2ee5fa23c930c6c839cd80f83e6fbdd73252eeea3334023df06f173e68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6e46f2ee5fa23c930c6c839cd80f83e6fbdd73252eeea3334023df06f173e68", kill_on_drop: false }`
[INFO] [stdout] e6e46f2ee5fa23c930c6c839cd80f83e6fbdd73252eeea3334023df06f173e68
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] e70ce10c14cae61a74d165c36e659f2a7f30c797a301b160483980c1135d64f5
[INFO] running `Command { std: "docker" "start" "-a" "e70ce10c14cae61a74d165c36e659f2a7f30c797a301b160483980c1135d64f5", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stdout] running 11 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/task_group-2dd37d72524ed98a)
[INFO] [stdout] test test::many_nested_children ... ok
[INFO] [stdout] test test::many_nested_children_error ... ok
[INFO] [stdout] test test::empty_child ... ok
[INFO] [stdout] test test::no_task ... ok
[INFO] [stdout] test test::one_empty_task ... ok
[INFO] [stdout] test test::child_task_errors ... ok
[INFO] [stdout] test test::root_task_errors ... ok
[INFO] [stdout] test test::child_task_panics ... ok
[INFO] [stdout] test test::root_task_panics ... ok
[INFO] [stdout] test test::child_sleep_no_timeout ... ok
[INFO] [stdout] test test::child_sleep_timeout ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 11 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.07s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests task-group
[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" "e70ce10c14cae61a74d165c36e659f2a7f30c797a301b160483980c1135d64f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e70ce10c14cae61a74d165c36e659f2a7f30c797a301b160483980c1135d64f5", kill_on_drop: false }`
[INFO] [stdout] e70ce10c14cae61a74d165c36e659f2a7f30c797a301b160483980c1135d64f5