[INFO] fetching crate futex_channel 0.0.0...
[INFO] testing futex_channel-0.0.0 against master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] extracting crate futex_channel 0.0.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate futex_channel 0.0.0 on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab4868190d6b99b7ceeaee2f1bda2076cfed2ac0c9fdb79030f701aae3e6be0b
[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" "ab4868190d6b99b7ceeaee2f1bda2076cfed2ac0c9fdb79030f701aae3e6be0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab4868190d6b99b7ceeaee2f1bda2076cfed2ac0c9fdb79030f701aae3e6be0b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab4868190d6b99b7ceeaee2f1bda2076cfed2ac0c9fdb79030f701aae3e6be0b", kill_on_drop: false }`
[INFO] [stdout] ab4868190d6b99b7ceeaee2f1bda2076cfed2ac0c9fdb79030f701aae3e6be0b
[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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 747d101bd3017941330db3155a34d54508cf7a8ebe0e56a7b84c0def773a9151
[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" "747d101bd3017941330db3155a34d54508cf7a8ebe0e56a7b84c0def773a9151", kill_on_drop: false }`
[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 0.60s
[INFO] running `Command { std: "docker" "inspect" "747d101bd3017941330db3155a34d54508cf7a8ebe0e56a7b84c0def773a9151", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "747d101bd3017941330db3155a34d54508cf7a8ebe0e56a7b84c0def773a9151", kill_on_drop: false }`
[INFO] [stdout] 747d101bd3017941330db3155a34d54508cf7a8ebe0e56a7b84c0def773a9151
[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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bfc75cd5c62352d9fb0e3f8e7569336ae103bfda1048cf48e684ef63eddf0d2a
[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" "bfc75cd5c62352d9fb0e3f8e7569336ae103bfda1048cf48e684ef63eddf0d2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling threadpool v1.8.1
[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 futex_channel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.63s
[INFO] running `Command { std: "docker" "inspect" "bfc75cd5c62352d9fb0e3f8e7569336ae103bfda1048cf48e684ef63eddf0d2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bfc75cd5c62352d9fb0e3f8e7569336ae103bfda1048cf48e684ef63eddf0d2a", kill_on_drop: false }`
[INFO] [stdout] bfc75cd5c62352d9fb0e3f8e7569336ae103bfda1048cf48e684ef63eddf0d2a
[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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] ea86b1ecdc14e71fb7701bfe8813d7d5c6d89217f6bd615344327122cebf3e5c
[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" "ea86b1ecdc14e71fb7701bfe8813d7d5c6d89217f6bd615344327122cebf3e5c", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: associated function is never used: `push_front`
[INFO] [stdout] running 9 tests
[INFO] [stderr]   --> src/inner.rs:65:19
[INFO] [stdout] test inner::tests::append ... ok
[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 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/futex_channel-9ba7be7ace2d91b8)
[INFO] [stdout] test inner::tests::pass_three_elements ... ok
[INFO] [stdout] test inner::tests::pass_three_elements_fifo ... ok
[INFO] [stdout] test inner::tests::pop_front_empty ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test inner::tests::append_pop_front_empty ... ok
[INFO] [stdout] test tests::single_inserter ... FAILED
[INFO] [stdout] test tests::multiple_inserter_while_pulling ... 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" "ea86b1ecdc14e71fb7701bfe8813d7d5c6d89217f6bd615344327122cebf3e5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea86b1ecdc14e71fb7701bfe8813d7d5c6d89217f6bd615344327122cebf3e5c", kill_on_drop: false }`
[INFO] [stdout] ea86b1ecdc14e71fb7701bfe8813d7d5c6d89217f6bd615344327122cebf3e5c