[INFO] fetching crate disk-queue 0.1.1... [INFO] checking disk-queue-0.1.1 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1 [INFO] extracting crate disk-queue 0.1.1 into /workspace/builds/worker-5-tc2/source [INFO] started tweaking crates.io crate disk-queue 0.1.1 [INFO] finished tweaking crates.io crate disk-queue 0.1.1 [INFO] tweaked toml for crates.io crate disk-queue 0.1.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate disk-queue 0.1.1 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] crate crates.io crate disk-queue 0.1.1 already has a lockfile, it will not be regenerated [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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 3590f5e56d34cdcd75f1664c20743935fe38f166ef190bae4285cd4e5d08b5a8 [INFO] running `Command { std: "docker" "start" "-a" "3590f5e56d34cdcd75f1664c20743935fe38f166ef190bae4285cd4e5d08b5a8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "3590f5e56d34cdcd75f1664c20743935fe38f166ef190bae4285cd4e5d08b5a8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3590f5e56d34cdcd75f1664c20743935fe38f166ef190bae4285cd4e5d08b5a8", kill_on_drop: false }` [INFO] [stdout] 3590f5e56d34cdcd75f1664c20743935fe38f166ef190bae4285cd4e5d08b5a8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 4a5cbd843b29f4374b70f16801ae666ea4022fa73f132c56eabcb8612c3e8fc7 [INFO] running `Command { std: "docker" "start" "-a" "4a5cbd843b29f4374b70f16801ae666ea4022fa73f132c56eabcb8612c3e8fc7", kill_on_drop: false }` [INFO] [stderr] Compiling autocfg v1.1.0 [INFO] [stderr] Compiling libc v0.2.132 [INFO] [stderr] Checking cfg-if v1.0.0 [INFO] [stderr] Compiling serde v1.0.144 [INFO] [stderr] Compiling crossbeam-utils v0.8.11 [INFO] [stderr] Checking once_cell v1.14.0 [INFO] [stderr] Compiling memchr v2.5.0 [INFO] [stderr] Compiling proc-macro2 v1.0.43 [INFO] [stderr] Checking scopeguard v1.1.0 [INFO] [stderr] Compiling unicode-ident v1.0.3 [INFO] [stderr] Compiling quote v1.0.21 [INFO] [stderr] Compiling rayon-core v1.9.3 [INFO] [stderr] Compiling syn v1.0.99 [INFO] [stderr] Compiling serde_json v1.0.85 [INFO] [stderr] Checking ryu v1.0.11 [INFO] [stderr] Checking either v1.8.0 [INFO] [stderr] Compiling serde_derive v1.0.144 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking plotters-backend v0.3.4 [INFO] [stderr] Checking itoa v1.0.3 [INFO] [stderr] Checking unicode-width v0.1.9 [INFO] [stderr] Checking regex-automata v0.1.10 [INFO] [stderr] Checking textwrap v0.11.0 [INFO] [stderr] Checking itertools v0.10.3 [INFO] [stderr] Checking ppv-lite86 v0.2.16 [INFO] [stderr] Checking bitflags v1.3.2 [INFO] [stderr] Checking cast v0.3.0 [INFO] [stderr] Checking itoa v0.4.8 [INFO] [stderr] Checking same-file v1.0.6 [INFO] [stderr] Compiling memoffset v0.6.5 [INFO] [stderr] Compiling crossbeam-epoch v0.9.10 [INFO] [stderr] Compiling num-traits v0.2.15 [INFO] [stderr] Compiling rayon v1.5.3 [INFO] [stderr] Checking plotters-svg v0.3.3 [INFO] [stderr] Checking half v1.8.2 [INFO] [stderr] Checking regex-syntax v0.6.27 [INFO] [stderr] Checking clap v2.34.0 [INFO] [stderr] Checking walkdir v2.3.2 [INFO] [stderr] Checking oorandom v11.1.3 [INFO] [stderr] Checking crossbeam-channel v0.5.6 [INFO] [stderr] Checking csv-core v0.1.10 [INFO] [stderr] Checking getrandom v0.2.7 [INFO] [stderr] Checking num_cpus v1.13.1 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Checking memmap v0.7.0 [INFO] [stderr] Checking disk-queue v0.1.1 (/opt/rustwide/workdir) [INFO] [stderr] Checking crossbeam-deque v0.8.2 [INFO] [stderr] Checking rand_core v0.6.3 [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> src/page.rs:192:17 [INFO] [stdout] | [INFO] [stdout] 192 | let _ = rwlatch.read().unwrap(); [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] 192 | let _unused = rwlatch.read().unwrap(); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 192 - let _ = rwlatch.read().unwrap(); [INFO] [stdout] 192 + drop(rwlatch.read().unwrap()); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> src/page.rs:233:17 [INFO] [stdout] | [INFO] [stdout] 233 | let _ = self.rwlatch.read().unwrap(); [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] 233 | let _unused = self.rwlatch.read().unwrap(); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 233 - let _ = self.rwlatch.read().unwrap(); [INFO] [stdout] 233 + drop(self.rwlatch.read().unwrap()); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> src/page.rs:242:17 [INFO] [stdout] | [INFO] [stdout] 242 | let _ = self.rwlatch.write().unwrap(); [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] 242 | let _unused = self.rwlatch.write().unwrap(); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 242 - let _ = self.rwlatch.write().unwrap(); [INFO] [stdout] 242 + drop(self.rwlatch.write().unwrap()); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> src/page.rs:256:21 [INFO] [stdout] | [INFO] [stdout] 256 | let _ = self.rwlatch.read().unwrap(); [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] 256 | let _unused = self.rwlatch.read().unwrap(); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 256 - let _ = self.rwlatch.read().unwrap(); [INFO] [stdout] 256 + drop(self.rwlatch.read().unwrap()); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> src/page.rs:274:21 [INFO] [stdout] | [INFO] [stdout] 274 | let _ = self.rwlatch.read().unwrap(); [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] 274 | let _unused = self.rwlatch.read().unwrap(); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 274 - let _ = self.rwlatch.read().unwrap(); [INFO] [stdout] 274 + drop(self.rwlatch.read().unwrap()); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: non-binding let on a synchronization lock [INFO] [stdout] --> src/page.rs:307:17 [INFO] [stdout] | [INFO] [stdout] 307 | let _ = self.rwlatch.write().unwrap(); [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] 307 | let _unused = self.rwlatch.write().unwrap(); [INFO] [stdout] | ++++++ [INFO] [stdout] help: consider immediately dropping the value [INFO] [stdout] | [INFO] [stdout] 307 - let _ = self.rwlatch.write().unwrap(); [INFO] [stdout] 307 + drop(self.rwlatch.write().unwrap()); [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `disk-queue` (lib) due to 6 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] running `Command { std: "docker" "inspect" "4a5cbd843b29f4374b70f16801ae666ea4022fa73f132c56eabcb8612c3e8fc7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4a5cbd843b29f4374b70f16801ae666ea4022fa73f132c56eabcb8612c3e8fc7", kill_on_drop: false }` [INFO] [stdout] 4a5cbd843b29f4374b70f16801ae666ea4022fa73f132c56eabcb8612c3e8fc7