[INFO] fetching crate executor-service 0.2.2...
[INFO] checking executor-service-0.2.2 against master#82310651b93a594a3fd69015e1562186a080d94c for pr-145770
[INFO] extracting crate executor-service 0.2.2 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate executor-service 0.2.2
[INFO] finished tweaking crates.io crate executor-service 0.2.2
[INFO] tweaked toml for crates.io crate executor-service 0.2.2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate executor-service 0.2.2 on toolchain 82310651b93a594a3fd69015e1562186a080d94c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "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" "+82310651b93a594a3fd69015e1562186a080d94c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 42 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+82310651b93a594a3fd69015e1562186a080d94c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ctor-proc-macro v0.0.6
[INFO] [stderr]   Downloaded ctor v0.5.0
[INFO] [stderr]   Downloaded dtor v0.1.0
[INFO] [stderr]   Downloaded dtor-proc-macro v0.0.6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+82310651b93a594a3fd69015e1562186a080d94c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 37b6e6467fa42d086012630d4ec8cc17147db3506ed0877f589f1756cea22648
[INFO] running `Command { std: "docker" "start" "-a" "37b6e6467fa42d086012630d4ec8cc17147db3506ed0877f589f1756cea22648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "37b6e6467fa42d086012630d4ec8cc17147db3506ed0877f589f1756cea22648", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "37b6e6467fa42d086012630d4ec8cc17147db3506ed0877f589f1756cea22648", kill_on_drop: false }`
[INFO] [stdout] 37b6e6467fa42d086012630d4ec8cc17147db3506ed0877f589f1756cea22648
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+82310651b93a594a3fd69015e1562186a080d94c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7a0e6c486f4d43b6dc239969460a4ade47c5ceb7469a3a0dc6b64d44c58bae98
[INFO] running `Command { std: "docker" "start" "-a" "7a0e6c486f4d43b6dc239969460a4ade47c5ceb7469a3a0dc6b64d44c58bae98", kill_on_drop: false }`
[INFO] [stderr]     Checking memchr v2.7.5
[INFO] [stderr]     Checking regex-syntax v0.8.6
[INFO] [stderr]     Checking log v0.4.27
[INFO] [stderr]     Checking utf8parse v0.2.2
[INFO] [stderr]     Checking anstyle v1.0.11
[INFO] [stderr]    Compiling dtor-proc-macro v0.0.6
[INFO] [stderr]     Checking colorchoice v1.0.4
[INFO] [stderr]     Checking anstyle-query v1.1.4
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.1
[INFO] [stderr]     Checking anstyle-parse v0.2.7
[INFO] [stderr]     Checking jiff v0.2.15
[INFO] [stderr]    Compiling ctor-proc-macro v0.0.6
[INFO] [stderr]     Checking executor-service v0.2.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/lib.rs:410:25
[INFO] [stdout]     |
[INFO] [stdout] 410 |                         Self::create_thread(current_thread_count, r, available.clone(), pool_waiter.clone());
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 410 |                         let _ = Self::create_thread(current_thread_count, r, available.clone(), pool_waiter.clone());
[INFO] [stdout]     |                         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: non-binding let on a synchronization lock
[INFO] [stdout]    --> src/lib.rs:416:29
[INFO] [stdout]     |
[INFO] [stdout] 416 |                         let _ = pool_waiter.wait(lock);
[INFO] [stdout]     |                             ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(let_underscore_lock)]` on by default
[INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 416 |                         let _unused = pool_waiter.wait(lock);
[INFO] [stdout]     |                              ++++++
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 416 -                         let _ = pool_waiter.wait(lock);
[INFO] [stdout] 416 +                         drop(pool_waiter.wait(lock));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: non-binding let on a synchronization lock
[INFO] [stdout]    --> src/lib.rs:421:27
[INFO] [stdout]     |
[INFO] [stdout] 421 |                       let _ = pool_waiter.wait(lock);
[INFO] [stdout]     |                           ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]     |
[INFO] [stdout] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 421 |                       let _unused = pool_waiter.wait(lock);
[INFO] [stdout]     |                            ++++++
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]     |
[INFO] [stdout] 421 -                       let _ = pool_waiter.wait(lock);
[INFO] [stdout] 421 +                       drop(pool_waiter.wait(lock));
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `executor-service` (lib) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7a0e6c486f4d43b6dc239969460a4ade47c5ceb7469a3a0dc6b64d44c58bae98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a0e6c486f4d43b6dc239969460a4ade47c5ceb7469a3a0dc6b64d44c58bae98", kill_on_drop: false }`
[INFO] [stdout] 7a0e6c486f4d43b6dc239969460a4ade47c5ceb7469a3a0dc6b64d44c58bae98
