[INFO] fetching crate futex_channel 0.0.0...
[INFO] testing futex_channel-0.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate futex_channel 0.0.0 into /workspace/builds/worker-73/source
[INFO] validating manifest of crates.io crate futex_channel 0.0.0 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 futex_channel 0.0.0
[INFO] finished tweaking crates.io crate futex_channel 0.0.0
[INFO] tweaked toml for crates.io crate futex_channel 0.0.0 written to /workspace/builds/worker-73/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linux-futex v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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] 747e4681a204b49060866e04878cd81f59ec4bfe38eba4aebe0f7f3ac8d10b20
[INFO] running `Command { std: "docker" "start" "-a" "747e4681a204b49060866e04878cd81f59ec4bfe38eba4aebe0f7f3ac8d10b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "747e4681a204b49060866e04878cd81f59ec4bfe38eba4aebe0f7f3ac8d10b20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "747e4681a204b49060866e04878cd81f59ec4bfe38eba4aebe0f7f3ac8d10b20", kill_on_drop: false }`
[INFO] [stdout] 747e4681a204b49060866e04878cd81f59ec4bfe38eba4aebe0f7f3ac8d10b20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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] b851854aed7c8b105a6b9a74910257bf4be2082446a57582c9c77183c3d39812
[INFO] running `Command { std: "docker" "start" "-a" "b851854aed7c8b105a6b9a74910257bf4be2082446a57582c9c77183c3d39812", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling linux-futex v0.1.1
[INFO] [stderr]    Compiling futex_channel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: associated function is never used: `push_front`
[INFO] [stdout]   --> src/inner.rs:65:19
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub(crate) fn push_front(&self, obj: T) -> AppendResult {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "b851854aed7c8b105a6b9a74910257bf4be2082446a57582c9c77183c3d39812", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b851854aed7c8b105a6b9a74910257bf4be2082446a57582c9c77183c3d39812", kill_on_drop: false }`
[INFO] [stdout] b851854aed7c8b105a6b9a74910257bf4be2082446a57582c9c77183c3d39812
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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] 9e9983723ce6c0e097a62429e6c962e7303fadaa7b9221bce9abc4e32f2d4065
[INFO] running `Command { std: "docker" "start" "-a" "9e9983723ce6c0e097a62429e6c962e7303fadaa7b9221bce9abc4e32f2d4065", kill_on_drop: false }`
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stdout] warning: associated function is never used: `push_front`
[INFO] [stdout]   --> src/inner.rs:65:19
[INFO] [stdout]    |
[INFO] [stdout] 65 |     pub(crate) fn push_front(&self, obj: T) -> AppendResult {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stderr]    Compiling futex_channel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.05s
[INFO] running `Command { std: "docker" "inspect" "9e9983723ce6c0e097a62429e6c962e7303fadaa7b9221bce9abc4e32f2d4065", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e9983723ce6c0e097a62429e6c962e7303fadaa7b9221bce9abc4e32f2d4065", kill_on_drop: false }`
[INFO] [stdout] 9e9983723ce6c0e097a62429e6c962e7303fadaa7b9221bce9abc4e32f2d4065
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-73/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] 29972ceb1c974b0381cc82c67e6231119fd0fc9acba0158d7adb1b870e82e2b0
[INFO] running `Command { std: "docker" "start" "-a" "29972ceb1c974b0381cc82c67e6231119fd0fc9acba0158d7adb1b870e82e2b0", kill_on_drop: false }`
[INFO] [stderr] warning: associated function is never used: `push_front`
[INFO] [stderr]   --> src/inner.rs:65:19
[INFO] [stderr]    |
[INFO] [stderr] 65 |     pub(crate) fn push_front(&self, obj: T) -> AppendResult {
[INFO] [stderr]    |                   ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `futex_channel` (lib) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/futex_channel-fb3d05648b040799)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test inner::tests::append ... ok
[INFO] [stdout] test inner::tests::append_pop_front_empty ... ok
[INFO] [stdout] test inner::tests::pass_three_elements ... ok
[INFO] [stdout] test inner::tests::pass_three_elements_fifo ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test inner::tests::pop_front_empty ... ok
[INFO] [stdout] test tests::multiple_inserter_while_pulling ... FAILED
[INFO] [stdout] test tests::single_inserter ... FAILED
[INFO] [stdout] test tests::multiple_inserter has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "29972ceb1c974b0381cc82c67e6231119fd0fc9acba0158d7adb1b870e82e2b0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "29972ceb1c974b0381cc82c67e6231119fd0fc9acba0158d7adb1b870e82e2b0", kill_on_drop: false }`
[INFO] [stdout] 29972ceb1c974b0381cc82c67e6231119fd0fc9acba0158d7adb1b870e82e2b0