[INFO] cloning repository https://github.com/Tandolf/semaphores
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Tandolf/semaphores" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTandolf%2Fsemaphores", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTandolf%2Fsemaphores'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e19f9d70de4243a3887f3ac3a43828feb2305ee3
[INFO] testing Tandolf/semaphores against 1.76.0 for beta-1.77-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTandolf%2Fsemaphores" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tandolf/semaphores on toolchain 1.76.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.76.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tandolf/semaphores
[INFO] finished tweaking git repo https://github.com/Tandolf/semaphores
[INFO] tweaked toml for git repo https://github.com/Tandolf/semaphores written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/Tandolf/semaphores 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" "+1.76.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] testing Tandolf/semaphores against beta-2024-02-10 for beta-1.77-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTandolf%2Fsemaphores" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tandolf/semaphores on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tandolf/semaphores
[INFO] finished tweaking git repo https://github.com/Tandolf/semaphores
[INFO] tweaked toml for git repo https://github.com/Tandolf/semaphores written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Tandolf/semaphores 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" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] testing Tandolf/semaphores against beta-2024-02-10 for beta-1.77-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FTandolf%2Fsemaphores" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Tandolf/semaphores on toolchain beta-2024-02-10
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Tandolf/semaphores
[INFO] finished tweaking git repo https://github.com/Tandolf/semaphores
[INFO] tweaked toml for git repo https://github.com/Tandolf/semaphores written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/Tandolf/semaphores 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" "+beta-2024-02-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cb6a6c954a4c8e3350927995243e1177eb116781c34fb2092a4444c8a3883729
[INFO] running `Command { std: "docker" "start" "-a" "cb6a6c954a4c8e3350927995243e1177eb116781c34fb2092a4444c8a3883729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cb6a6c954a4c8e3350927995243e1177eb116781c34fb2092a4444c8a3883729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cb6a6c954a4c8e3350927995243e1177eb116781c34fb2092a4444c8a3883729", kill_on_drop: false }`
[INFO] [stdout] cb6a6c954a4c8e3350927995243e1177eb116781c34fb2092a4444c8a3883729
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e5950a4a31432c16dcc69eb68c536bf5642665913f817a7384255beee69301a
[INFO] running `Command { std: "docker" "start" "-a" "3e5950a4a31432c16dcc69eb68c536bf5642665913f817a7384255beee69301a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling ppv-lite86 v0.2.17
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling semaphores v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: non-binding let on a synchronization lock
[INFO] [stdout]   --> src/multiplex.rs:34:25
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     let _ = cvar.wait_while(queue.lock().unwrap(), |value| *value == 0);
[INFO] [stdout]    |                         ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(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] 34 |                     let _unused = cvar.wait_while(queue.lock().unwrap(), |value| *value == 0);
[INFO] [stdout]    |                         ~~~~~~~
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     drop(cvar.wait_while(queue.lock().unwrap(), |value| *value == 0));
[INFO] [stdout]    |                     ~~~~~                                                           +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
[INFO] running `Command { std: "docker" "inspect" "3e5950a4a31432c16dcc69eb68c536bf5642665913f817a7384255beee69301a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e5950a4a31432c16dcc69eb68c536bf5642665913f817a7384255beee69301a", kill_on_drop: false }`
[INFO] [stdout] 3e5950a4a31432c16dcc69eb68c536bf5642665913f817a7384255beee69301a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 722380782d372ee4ebd2e7610c9064ab08fad46dcf608bb5b5121c29b7a5a4c2
[INFO] running `Command { std: "docker" "start" "-a" "722380782d372ee4ebd2e7610c9064ab08fad46dcf608bb5b5121c29b7a5a4c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling semaphores v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: non-binding let on a synchronization lock
[INFO] [stdout]   --> src/multiplex.rs:34:25
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     let _ = cvar.wait_while(queue.lock().unwrap(), |value| *value == 0);
[INFO] [stdout]    |                         ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(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] 34 |                     let _unused = cvar.wait_while(queue.lock().unwrap(), |value| *value == 0);
[INFO] [stdout]    |                         ~~~~~~~
[INFO] [stdout] help: consider immediately dropping the value
[INFO] [stdout]    |
[INFO] [stdout] 34 |                     drop(cvar.wait_while(queue.lock().unwrap(), |value| *value == 0));
[INFO] [stdout]    |                     ~~~~~                                                           +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "722380782d372ee4ebd2e7610c9064ab08fad46dcf608bb5b5121c29b7a5a4c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "722380782d372ee4ebd2e7610c9064ab08fad46dcf608bb5b5121c29b7a5a4c2", kill_on_drop: false }`
[INFO] [stdout] 722380782d372ee4ebd2e7610c9064ab08fad46dcf608bb5b5121c29b7a5a4c2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2024-02-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] da83542bdb697fa80a1688e9c75f0ccd29cf3660e3cc9cd5711c147bb6f58eab
[INFO] running `Command { std: "docker" "start" "-a" "da83542bdb697fa80a1688e9c75f0ccd29cf3660e3cc9cd5711c147bb6f58eab", kill_on_drop: false }`
[INFO] [stderr] warning: non-binding let on a synchronization lock
[INFO] [stderr]   --> src/multiplex.rs:34:25
[INFO] [stderr]    |
[INFO] [stderr] 34 |                     let _ = cvar.wait_while(queue.lock().unwrap(), |value| *value == 0);
[INFO] [stderr]    |                         ^ this lock is not assigned to a binding and is immediately dropped
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(let_underscore_lock)]` on by default
[INFO] [stderr] help: consider binding to an unused variable to avoid immediately dropping the value
[INFO] [stderr]    |
[INFO] [stderr] 34 |                     let _unused = cvar.wait_while(queue.lock().unwrap(), |value| *value == 0);
[INFO] [stderr]    |                         ~~~~~~~
[INFO] [stderr] help: consider immediately dropping the value
[INFO] [stderr]    |
[INFO] [stderr] 34 |                     drop(cvar.wait_while(queue.lock().unwrap(), |value| *value == 0));
[INFO] [stderr]    |                     ~~~~~                                                           +
[INFO] [stderr] 
[INFO] [stderr] warning: `semaphores` (bin "semaphores" test) generated 1 warning (run `cargo fix --bin "semaphores" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/semaphores-1993ce82d3782f6a)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "da83542bdb697fa80a1688e9c75f0ccd29cf3660e3cc9cd5711c147bb6f58eab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da83542bdb697fa80a1688e9c75f0ccd29cf3660e3cc9cd5711c147bb6f58eab", kill_on_drop: false }`
[INFO] [stdout] da83542bdb697fa80a1688e9c75f0ccd29cf3660e3cc9cd5711c147bb6f58eab
