[INFO] fetching crate executor-service 0.2.2... [INFO] checking executor-service-0.2.2 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1 [INFO] extracting crate executor-service 0.2.2 into /workspace/builds/worker-0-tc2/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-0-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate executor-service 0.2.2 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] cd3721d712408f7f7c48b700b15af3395fb77f71c04ba73fc0661ff38a91e3fc [INFO] running `Command { std: "docker" "start" "-a" "cd3721d712408f7f7c48b700b15af3395fb77f71c04ba73fc0661ff38a91e3fc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "cd3721d712408f7f7c48b700b15af3395fb77f71c04ba73fc0661ff38a91e3fc", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "cd3721d712408f7f7c48b700b15af3395fb77f71c04ba73fc0661ff38a91e3fc", kill_on_drop: false }` [INFO] [stdout] cd3721d712408f7f7c48b700b15af3395fb77f71c04ba73fc0661ff38a91e3fc [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 349a3497c90918634de6beccc111c19baa5112657af97d05fe2524cc9e4ab9af [INFO] running `Command { std: "docker" "start" "-a" "349a3497c90918634de6beccc111c19baa5112657af97d05fe2524cc9e4ab9af", kill_on_drop: false }` [INFO] [stderr] Checking memchr v2.7.5 [INFO] [stderr] Checking regex-syntax v0.8.6 [INFO] [stderr] Checking utf8parse v0.2.2 [INFO] [stderr] Checking log v0.4.27 [INFO] [stderr] Compiling dtor-proc-macro v0.0.6 [INFO] [stderr] Checking is_terminal_polyfill v1.70.1 [INFO] [stderr] Checking anstyle-query v1.1.4 [INFO] [stderr] Checking anstyle v1.0.11 [INFO] [stderr] Checking colorchoice v1.0.4 [INFO] [stderr] Checking jiff v0.2.15 [INFO] [stderr] Compiling ctor-proc-macro v0.0.6 [INFO] [stderr] Checking anstyle-parse v0.2.7 [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" "349a3497c90918634de6beccc111c19baa5112657af97d05fe2524cc9e4ab9af", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "349a3497c90918634de6beccc111c19baa5112657af97d05fe2524cc9e4ab9af", kill_on_drop: false }` [INFO] [stdout] 349a3497c90918634de6beccc111c19baa5112657af97d05fe2524cc9e4ab9af