[INFO] cloning repository https://github.com/imhassane/thread_rust_multiplier [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/imhassane/thread_rust_multiplier" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimhassane%2Fthread_rust_multiplier", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimhassane%2Fthread_rust_multiplier'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 681ed6d5142d27b2258c2a43643be9b218b5ebb9 [INFO] checking imhassane/thread_rust_multiplier against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimhassane%2Fthread_rust_multiplier" "/workspace/builds/worker-12/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/imhassane/thread_rust_multiplier on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/imhassane/thread_rust_multiplier [INFO] finished tweaking git repo https://github.com/imhassane/thread_rust_multiplier [INFO] tweaked toml for git repo https://github.com/imhassane/thread_rust_multiplier written to /workspace/builds/worker-12/source/Cargo.toml [INFO] crate git repo https://github.com/imhassane/thread_rust_multiplier already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d98f4c3ebf613ebbccd1cace987ef6678daa3a17d7c3e6b540393fa3379fa021 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "d98f4c3ebf613ebbccd1cace987ef6678daa3a17d7c3e6b540393fa3379fa021", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d98f4c3ebf613ebbccd1cace987ef6678daa3a17d7c3e6b540393fa3379fa021", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d98f4c3ebf613ebbccd1cace987ef6678daa3a17d7c3e6b540393fa3379fa021", kill_on_drop: false }` [INFO] [stdout] d98f4c3ebf613ebbccd1cace987ef6678daa3a17d7c3e6b540393fa3379fa021 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 29a7a7bdd43f3d49e889e67ecf57eeef8928c0c0b6155877eb0e3e3ea4c8de18 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "29a7a7bdd43f3d49e889e67ecf57eeef8928c0c0b6155877eb0e3e3ea4c8de18", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.67 [INFO] [stderr] Checking getrandom v0.1.14 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.1 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Checking rev1 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:75:13 [INFO] [stdout] | [INFO] [stdout] 75 | let mut prod = lock.lock().unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:75:13 [INFO] [stdout] | [INFO] [stdout] 75 | let mut prod = lock.lock().unwrap(); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `MutexGuard` that must be used [INFO] [stdout] --> src/main.rs:68:17 [INFO] [stdout] | [INFO] [stdout] 68 | cvar.wait(prod).unwrap(); [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: unused `MutexGuard` that must be used [INFO] [stdout] --> src/main.rs:82:17 [INFO] [stdout] | [INFO] [stdout] 82 | cvar.wait(prod).unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if unused the Mutex will immediately unlock [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `MutexGuard` that must be used [INFO] [stdout] --> src/main.rs:68:17 [INFO] [stdout] | [INFO] [stdout] 68 | cvar.wait(prod).unwrap(); [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: unused `MutexGuard` that must be used [INFO] [stdout] --> src/main.rs:82:17 [INFO] [stdout] | [INFO] [stdout] 82 | cvar.wait(prod).unwrap(); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: if unused the Mutex will immediately unlock [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 5.62s [INFO] running `Command { std: "docker" "inspect" "29a7a7bdd43f3d49e889e67ecf57eeef8928c0c0b6155877eb0e3e3ea4c8de18", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "29a7a7bdd43f3d49e889e67ecf57eeef8928c0c0b6155877eb0e3e3ea4c8de18", kill_on_drop: false }` [INFO] [stdout] 29a7a7bdd43f3d49e889e67ecf57eeef8928c0c0b6155877eb0e3e3ea4c8de18