[INFO] fetching crate lockbell 0.1.0...
[INFO] testing lockbell-0.1.0 against beta-2026-04-21 for beta-1.96-1
[INFO] extracting crate lockbell 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate lockbell 0.1.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate lockbell 0.1.0
[INFO] tweaked toml for crates.io crate lockbell 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate lockbell 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate lockbell 0.1.0 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-2026-04-21" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f3e49162a3213c97e4af40744c1d59455cc6ac0eddfc0270df2a5ba8bae9e4ab
[INFO] running `Command { std: "docker" "start" "-a" "f3e49162a3213c97e4af40744c1d59455cc6ac0eddfc0270df2a5ba8bae9e4ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3e49162a3213c97e4af40744c1d59455cc6ac0eddfc0270df2a5ba8bae9e4ab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3e49162a3213c97e4af40744c1d59455cc6ac0eddfc0270df2a5ba8bae9e4ab", kill_on_drop: false }`
[INFO] [stdout] f3e49162a3213c97e4af40744c1d59455cc6ac0eddfc0270df2a5ba8bae9e4ab
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0072fe000841a0d267e6201265bad6739c6ebd7c7de8a7f41404a7816e07a405
[INFO] running `Command { std: "docker" "start" "-a" "0072fe000841a0d267e6201265bad6739c6ebd7c7de8a7f41404a7816e07a405", kill_on_drop: false }`
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling lockbell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.53s
[INFO] running `Command { std: "docker" "inspect" "0072fe000841a0d267e6201265bad6739c6ebd7c7de8a7f41404a7816e07a405", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0072fe000841a0d267e6201265bad6739c6ebd7c7de8a7f41404a7816e07a405", kill_on_drop: false }`
[INFO] [stdout] 0072fe000841a0d267e6201265bad6739c6ebd7c7de8a7f41404a7816e07a405
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f6190a57590aa75d9ac43a363388411b6cfb485a6f49f5f4a4e155f93011dbea
[INFO] running `Command { std: "docker" "start" "-a" "f6190a57590aa75d9ac43a363388411b6cfb485a6f49f5f4a4e155f93011dbea", kill_on_drop: false }`
[INFO] [stderr]    Compiling lockbell v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.65s
[INFO] running `Command { std: "docker" "inspect" "f6190a57590aa75d9ac43a363388411b6cfb485a6f49f5f4a4e155f93011dbea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f6190a57590aa75d9ac43a363388411b6cfb485a6f49f5f4a4e155f93011dbea", kill_on_drop: false }`
[INFO] [stdout] f6190a57590aa75d9ac43a363388411b6cfb485a6f49f5f4a4e155f93011dbea
[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=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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 841eceaff26e855413480d2591becba63c23f266bdc7fb6b8080c27bc4139317
[INFO] running `Command { std: "docker" "start" "-a" "841eceaff26e855413480d2591becba63c23f266bdc7fb6b8080c27bc4139317", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/lockbell-f739c8b33d4fc75c)
[INFO] [stdout] 
[INFO] [stdout] running 7 tests
[INFO] [stdout] test tests::race::test_in_flight_try_write_or_collected_by_write_guard_drain ... ok
[INFO] [stdout] test tests::race::test_in_flight_try_write_or_during_last_read_guard_drop ... ok
[INFO] [stdout] test tests::race::test_read_guard_drop_atomicity ... ok
[INFO] [stdout] test tests::race::test_try_write_or_during_drain_eventually_proceeds ... ok
[INFO] [stdout] test tests::race::test_callbacks_run_after_dropping_is_reset has been running for over 60 seconds
[INFO] [stdout] test tests::race::test_while_dropping_loop_is_entered has been running for over 60 seconds
[INFO] [stdout] test tests::race::test_write_guard_locking_zero_wait_is_entered has been running for over 60 seconds
[ERROR] error running command: no output for 300 seconds
[INFO] running `Command { std: "docker" "inspect" "841eceaff26e855413480d2591becba63c23f266bdc7fb6b8080c27bc4139317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "841eceaff26e855413480d2591becba63c23f266bdc7fb6b8080c27bc4139317", kill_on_drop: false }`
[INFO] [stdout] 841eceaff26e855413480d2591becba63c23f266bdc7fb6b8080c27bc4139317