[INFO] fetching crate futex_channel 0.0.0...
[INFO] testing futex_channel-0.0.0 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate futex_channel 0.0.0 into /workspace/builds/worker-0-tc1/source
[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-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate futex_channel 0.0.0 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding linux-futex v0.1.2 (available: v1.0.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linux-futex v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b67e4bc1bf5c5e5281b22b799f6f05f91938022ea10428e8f23a89649e535c2d
[INFO] running `Command { std: "docker" "start" "-a" "b67e4bc1bf5c5e5281b22b799f6f05f91938022ea10428e8f23a89649e535c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b67e4bc1bf5c5e5281b22b799f6f05f91938022ea10428e8f23a89649e535c2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b67e4bc1bf5c5e5281b22b799f6f05f91938022ea10428e8f23a89649e535c2d", kill_on_drop: false }`
[INFO] [stdout] b67e4bc1bf5c5e5281b22b799f6f05f91938022ea10428e8f23a89649e535c2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff1447c65fad1c75a3d3602c164ba2eed06dd70614e0786cd6969fb7cd1488fe
[INFO] running `Command { std: "docker" "start" "-a" "ff1447c65fad1c75a3d3602c164ba2eed06dd70614e0786cd6969fb7cd1488fe", kill_on_drop: false }`
[INFO] [stderr]    Compiling linux-futex v0.1.2
[INFO] [stderr]    Compiling futex_channel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `push_front` is never used
[INFO] [stdout]   --> src/inner.rs:65:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> Inner<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub(crate) fn push_front(&self, obj: T) -> AppendResult {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `Command { std: "docker" "inspect" "ff1447c65fad1c75a3d3602c164ba2eed06dd70614e0786cd6969fb7cd1488fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff1447c65fad1c75a3d3602c164ba2eed06dd70614e0786cd6969fb7cd1488fe", kill_on_drop: false }`
[INFO] [stdout] ff1447c65fad1c75a3d3602c164ba2eed06dd70614e0786cd6969fb7cd1488fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef9b855b9623660e6c04d3eb3d301c96ee7b66a16b210ff825633f00904a914c
[INFO] running `Command { std: "docker" "start" "-a" "ef9b855b9623660e6c04d3eb3d301c96ee7b66a16b210ff825633f00904a914c", kill_on_drop: false }`
[INFO] [stderr]    Compiling threadpool v1.8.1
[INFO] [stdout] warning: method `push_front` is never used
[INFO] [stdout]   --> src/inner.rs:65:19
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl<T> Inner<T> {
[INFO] [stdout]    | ---------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 65 |     pub(crate) fn push_front(&self, obj: T) -> AppendResult {
[INFO] [stdout]    |                   ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling futex_channel v0.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `Command { std: "docker" "inspect" "ef9b855b9623660e6c04d3eb3d301c96ee7b66a16b210ff825633f00904a914c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef9b855b9623660e6c04d3eb3d301c96ee7b66a16b210ff825633f00904a914c", kill_on_drop: false }`
[INFO] [stdout] ef9b855b9623660e6c04d3eb3d301c96ee7b66a16b210ff825633f00904a914c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "RUSTDOCFLAGS=--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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6b8f27ab7fcabe352b69d29a4dc652c289ba66160641618e2f39de7683addde2
[INFO] running `Command { std: "docker" "start" "-a" "6b8f27ab7fcabe352b69d29a4dc652c289ba66160641618e2f39de7683addde2", kill_on_drop: false }`
[INFO] [stderr] warning: method `push_front` is never used
[INFO] [stderr]   --> src/inner.rs:65:19
[INFO] [stderr]    |
[INFO] [stderr] 19 | impl<T> Inner<T> {
[INFO] [stderr]    | ---------------- method in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 65 |     pub(crate) fn push_front(&self, obj: T) -> AppendResult {
[INFO] [stderr]    |                   ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `futex_channel` (lib) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/futex_channel-a25c1468305f091c)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test inner::tests::append ... ok
[INFO] [stdout] test inner::tests::pop_front_empty ... ok
[INFO] [stdout] test inner::tests::append_pop_front_empty ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test inner::tests::pass_three_elements ... ok
[INFO] [stdout] test inner::tests::pass_three_elements_fifo ... 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" "6b8f27ab7fcabe352b69d29a4dc652c289ba66160641618e2f39de7683addde2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b8f27ab7fcabe352b69d29a4dc652c289ba66160641618e2f39de7683addde2", kill_on_drop: false }`
[INFO] [stdout] 6b8f27ab7fcabe352b69d29a4dc652c289ba66160641618e2f39de7683addde2