[INFO] cloning repository https://github.com/sunnywhy/rust-thread-pool
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sunnywhy/rust-thread-pool" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunnywhy%2Frust-thread-pool", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunnywhy%2Frust-thread-pool'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6227f5fded0d0cecad295c6151b1fb82c4c45acf
[INFO] testing sunnywhy/rust-thread-pool against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsunnywhy%2Frust-thread-pool" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sunnywhy/rust-thread-pool on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sunnywhy/rust-thread-pool
[INFO] finished tweaking git repo https://github.com/sunnywhy/rust-thread-pool
[INFO] tweaked toml for git repo https://github.com/sunnywhy/rust-thread-pool written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sunnywhy/rust-thread-pool already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "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-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0669dca13f59da2b8956e7ef511f28fa94233d4bc4e1ace95b0e7f88e3744bdc
[INFO] running `Command { std: "docker" "start" "-a" "0669dca13f59da2b8956e7ef511f28fa94233d4bc4e1ace95b0e7f88e3744bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0669dca13f59da2b8956e7ef511f28fa94233d4bc4e1ace95b0e7f88e3744bdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0669dca13f59da2b8956e7ef511f28fa94233d4bc4e1ace95b0e7f88e3744bdc", kill_on_drop: false }`
[INFO] [stdout] 0669dca13f59da2b8956e7ef511f28fa94233d4bc4e1ace95b0e7f88e3744bdc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 391f924af874dd5cfaf020fa4ac39b40767da419e1aed419f480aa0548874af1
[INFO] running `Command { std: "docker" "start" "-a" "391f924af874dd5cfaf020fa4ac39b40767da419e1aed419f480aa0548874af1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.77
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling rust_thread_pool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `MutexGuard` that must be used
[INFO] [stdout]   --> src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             self.empty_trigger.lock().expect("Unable to notify all joining threads");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if unused the Mutex will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.51s
[INFO] running `Command { std: "docker" "inspect" "391f924af874dd5cfaf020fa4ac39b40767da419e1aed419f480aa0548874af1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "391f924af874dd5cfaf020fa4ac39b40767da419e1aed419f480aa0548874af1", kill_on_drop: false }`
[INFO] [stdout] 391f924af874dd5cfaf020fa4ac39b40767da419e1aed419f480aa0548874af1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de0227c51f83668c11976f5d708fce47e661eb34735995b823cf1b39d6517188
[INFO] running `Command { std: "docker" "start" "-a" "de0227c51f83668c11976f5d708fce47e661eb34735995b823cf1b39d6517188", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_thread_pool v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `MutexGuard` that must be used
[INFO] [stdout]   --> src/main.rs:38:13
[INFO] [stdout]    |
[INFO] [stdout] 38 |             self.empty_trigger.lock().expect("Unable to notify all joining threads");
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if unused the Mutex will immediately unlock
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "de0227c51f83668c11976f5d708fce47e661eb34735995b823cf1b39d6517188", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de0227c51f83668c11976f5d708fce47e661eb34735995b823cf1b39d6517188", kill_on_drop: false }`
[INFO] [stdout] de0227c51f83668c11976f5d708fce47e661eb34735995b823cf1b39d6517188
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 4503489692d172202655f1bfbc52c1b32c3c4f8720a7fb8b0e1b44dd3a26fdbe
[INFO] running `Command { std: "docker" "start" "-a" "4503489692d172202655f1bfbc52c1b32c3c4f8720a7fb8b0e1b44dd3a26fdbe", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused `MutexGuard` that must be used
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:38:13
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 38 |             self.empty_trigger.lock().expect("Unable to notify all joining threads");
[INFO] [stdout] 
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if unused the Mutex will immediately unlock
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_thread_pool-c28ebe0e7e71d686)
[INFO] running `Command { std: "docker" "inspect" "4503489692d172202655f1bfbc52c1b32c3c4f8720a7fb8b0e1b44dd3a26fdbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4503489692d172202655f1bfbc52c1b32c3c4f8720a7fb8b0e1b44dd3a26fdbe", kill_on_drop: false }`
[INFO] [stdout] 4503489692d172202655f1bfbc52c1b32c3c4f8720a7fb8b0e1b44dd3a26fdbe