[INFO] fetching crate run-down 0.1.1...
[INFO] testing run-down-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate run-down 0.1.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate run-down 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate run-down 0.1.1
[INFO] finished tweaking crates.io crate run-down 0.1.1
[INFO] tweaked toml for crates.io crate run-down 0.1.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5661a3f973fc862ce3f5a6d4fe18710a81d4209527f8300fc75604e2e25dbcb6
[INFO] running `Command { std: "docker" "start" "-a" "5661a3f973fc862ce3f5a6d4fe18710a81d4209527f8300fc75604e2e25dbcb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5661a3f973fc862ce3f5a6d4fe18710a81d4209527f8300fc75604e2e25dbcb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5661a3f973fc862ce3f5a6d4fe18710a81d4209527f8300fc75604e2e25dbcb6", kill_on_drop: false }`
[INFO] [stdout] 5661a3f973fc862ce3f5a6d4fe18710a81d4209527f8300fc75604e2e25dbcb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7044599af1078843f7fab4ca577f58fd970aff655f8e33c7dbb393a9a347a23
[INFO] running `Command { std: "docker" "start" "-a" "e7044599af1078843f7fab4ca577f58fd970aff655f8e33c7dbb393a9a347a23", kill_on_drop: false }`
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling lazy-init v0.3.0
[INFO] [stderr]    Compiling parking_lot_core v0.7.2
[INFO] [stderr]    Compiling rsevents v0.2.1
[INFO] [stderr]    Compiling run-down v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.14s
[INFO] running `Command { std: "docker" "inspect" "e7044599af1078843f7fab4ca577f58fd970aff655f8e33c7dbb393a9a347a23", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7044599af1078843f7fab4ca577f58fd970aff655f8e33c7dbb393a9a347a23", kill_on_drop: false }`
[INFO] [stdout] e7044599af1078843f7fab4ca577f58fd970aff655f8e33c7dbb393a9a347a23
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] be6491097628f3b34f1225b27e4ad2542e72b4a083d0cd6a47d8daf2af6a66e5
[INFO] running `Command { std: "docker" "start" "-a" "be6491097628f3b34f1225b27e4ad2542e72b4a083d0cd6a47d8daf2af6a66e5", kill_on_drop: false }`
[INFO] [stderr]    Compiling run-down v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stdout]   --> tests/unit-tests.rs:19:24
[INFO] [stdout]    |
[INFO] [stdout] 19 |     fn is_droppable<T: Drop>() {}
[INFO] [stdout]    |                        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(drop_bounds)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `Command { std: "docker" "inspect" "be6491097628f3b34f1225b27e4ad2542e72b4a083d0cd6a47d8daf2af6a66e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be6491097628f3b34f1225b27e4ad2542e72b4a083d0cd6a47d8daf2af6a66e5", kill_on_drop: false }`
[INFO] [stdout] be6491097628f3b34f1225b27e4ad2542e72b4a083d0cd6a47d8daf2af6a66e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f93819a5c6a35e3ff480a815f2179e3a3ef0f4c44099f3c50fb938da0e54072d
[INFO] running `Command { std: "docker" "start" "-a" "f93819a5c6a35e3ff480a815f2179e3a3ef0f4c44099f3c50fb938da0e54072d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: bounds on `T: Drop` are useless, consider instead using `std::mem::needs_drop` to detect if a type has a destructor
[INFO] [stderr]   --> tests/unit-tests.rs:19:24
[INFO] [stderr]    |
[INFO] [stderr] 19 |     fn is_droppable<T: Drop>() {}
[INFO] [stderr]    |                        ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(drop_bounds)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `run-down` (test "unit-tests") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.48s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/run_down-7e453cc232dad656)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test flags::test_rundown_flags_refcount ... ok
[INFO] [stdout] test flags::test_rundown_flags_set_in_progress ... ok
[INFO] [stdout] test flags::test_to_flags ... ok
[INFO] [stdout] test rundown_ref::test_wait_when_protected ... ok
[INFO] [stdout] test flags::test_rundown_flags_overflow_panic - should panic ... ok
[INFO] [stdout] test flags::test_rundown_flags_underflow_panic - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/unit-tests.rs (/opt/rustwide/target/debug/deps/unit_tests-de194500ef327e7a)
[INFO] [stdout] 
[INFO] [stdout] running 8 tests
[INFO] [stdout] test test_acquisition_when_not_rundown ... ok
[INFO] [stdout] test test_acquisition_when_rundown ... ok
[INFO] [stdout] test test_re_init ... ok
[INFO] [stdout] test test_multiple_successive_waits ... ok
[INFO] [stdout] test test_rundown_guard_implements_drop ... ok
[INFO] [stdout] test test_re_init_panic_without_rundown - should panic ... ok
[INFO] [stdout] test test_re_init_panic_on_ref - should panic ... ok
[INFO] [stdout] test test_usage_with_concurrency ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests run-down
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 16) ... ok
[INFO] [stdout] test src/lib.rs - readme_examples (line 116) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.39s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "f93819a5c6a35e3ff480a815f2179e3a3ef0f4c44099f3c50fb938da0e54072d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f93819a5c6a35e3ff480a815f2179e3a3ef0f4c44099f3c50fb938da0e54072d", kill_on_drop: false }`
[INFO] [stdout] f93819a5c6a35e3ff480a815f2179e3a3ef0f4c44099f3c50fb938da0e54072d