[INFO] fetching crate thin-cell 0.2.1...
[INFO] testing thin-cell-0.2.1 against master#562dee4820c458d823175268e41601d4c060588a for pr-154210-2
[INFO] extracting crate thin-cell 0.2.1 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate thin-cell 0.2.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate thin-cell 0.2.1
[INFO] tweaked toml for crates.io crate thin-cell 0.2.1 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate thin-cell 0.2.1 on toolchain 562dee4820c458d823175268e41601d4c060588a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate thin-cell 0.2.1 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" "+562dee4820c458d823175268e41601d4c060588a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded synchrony v0.1.7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+562dee4820c458d823175268e41601d4c060588a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cc24355ff27754e85a707f56dcd292bbc374ee775762a48cf10fe2bd8d9eca88
[INFO] running `Command { std: "docker" "start" "-a" "cc24355ff27754e85a707f56dcd292bbc374ee775762a48cf10fe2bd8d9eca88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc24355ff27754e85a707f56dcd292bbc374ee775762a48cf10fe2bd8d9eca88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc24355ff27754e85a707f56dcd292bbc374ee775762a48cf10fe2bd8d9eca88", kill_on_drop: false }`
[INFO] [stdout] cc24355ff27754e85a707f56dcd292bbc374ee775762a48cf10fe2bd8d9eca88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd8d9ce7a04a17f3dfc02868333bb505a9e5b18ae452b7ba7262ecb8ee2f3468
[INFO] running `Command { std: "docker" "start" "-a" "dd8d9ce7a04a17f3dfc02868333bb505a9e5b18ae452b7ba7262ecb8ee2f3468", kill_on_drop: false }`
[INFO] [stderr]    Compiling synchrony v0.1.7
[INFO] [stderr]    Compiling thin-cell v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `Command { std: "docker" "inspect" "dd8d9ce7a04a17f3dfc02868333bb505a9e5b18ae452b7ba7262ecb8ee2f3468", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd8d9ce7a04a17f3dfc02868333bb505a9e5b18ae452b7ba7262ecb8ee2f3468", kill_on_drop: false }`
[INFO] [stdout] dd8d9ce7a04a17f3dfc02868333bb505a9e5b18ae452b7ba7262ecb8ee2f3468
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1a0547a82d866fb83870b97c248e6a54e02527f1c7088d41fd9f18b740e3d999
[INFO] running `Command { std: "docker" "start" "-a" "1a0547a82d866fb83870b97c248e6a54e02527f1c7088d41fd9f18b740e3d999", kill_on_drop: false }`
[INFO] [stderr]    Compiling thin-cell v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 2.90s
[INFO] running `Command { std: "docker" "inspect" "1a0547a82d866fb83870b97c248e6a54e02527f1c7088d41fd9f18b740e3d999", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1a0547a82d866fb83870b97c248e6a54e02527f1c7088d41fd9f18b740e3d999", kill_on_drop: false }`
[INFO] [stdout] 1a0547a82d866fb83870b97c248e6a54e02527f1c7088d41fd9f18b740e3d999
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+562dee4820c458d823175268e41601d4c060588a" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8526b7cd78c7f142cbd8b5f8f40b34b4974e510d89cff57354084ea8540a419c
[INFO] running `Command { std: "docker" "start" "-a" "8526b7cd78c7f142cbd8b5f8f40b34b4974e510d89cff57354084ea8540a419c", 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/thin_cell-a0aa88ed7ec3b3e0)
[INFO] [stdout] 
[INFO] [stdout] running 25 tests
[INFO] [stdout] test sync::state::test_state_borrow ... ok
[INFO] [stdout] test sync::state::test_state_dec ... ok
[INFO] [stdout] test sync::state::test_state_count ... ok
[INFO] [stdout] test sync::state::test_state_borrow_preserves_rc ... ok
[INFO] [stdout] test sync::state::test_state_eq ... ok
[INFO] [stdout] test sync::state::test_state_borrow_with_multiple_refs ... ok
[INFO] [stdout] test sync::state::test_state_new ... ok
[INFO] [stdout] test sync::state::test_state_try_borrow_failure ... ok
[INFO] [stdout] test sync::state::test_state_try_borrow_success ... ok
[INFO] [stdout] test sync::state::test_state_inc ... ok
[INFO] [stdout] test sync::state::test_state_is_shared ... ok
[INFO] [stdout] test sync::state::test_state_unborrow ... ok
[INFO] [stdout] test unsync::state::test_state_borrow_preserves_rc ... ok
[INFO] [stdout] test unsync::state::test_state_borrow ... ok
[INFO] [stdout] test unsync::state::test_state_borrow_with_multiple_refs ... ok
[INFO] [stdout] test unsync::state::test_state_count ... ok
[INFO] [stdout] test unsync::state::test_state_eq ... ok
[INFO] [stdout] test unsync::state::test_state_dec ... ok
[INFO] [stdout] test unsync::state::test_state_try_borrow_success ... ok
[INFO] [stdout] test unsync::state::test_state_try_borrow_failure ... ok
[INFO] [stdout] test unsync::state::test_state_inc ... ok
[INFO] [stdout] test unsync::state::test_state_new ... ok
[INFO] [stdout] test unsync::state::test_state_unborrow ... ok
[INFO] [stdout] test unsync::state::test_state_is_shared ... ok
[INFO] [stderr]      Running tests/common.rs (/opt/rustwide/target/debug/deps/common-ebbe4467871ff8a3)
[INFO] [stderr]      Running tests/sync.rs (/opt/rustwide/target/debug/deps/sync-5b9c6c714a0812fa)
[INFO] [stdout] test unsync::state::test_state_borrow_panic - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 25 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[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] [stdout] 
[INFO] [stdout] running 102 tests
[INFO] [stdout] test test_cast_back ... ok
[INFO] [stdout] test test_box_trait_object_concurrent ... ok
[INFO] [stdout] test test_coerce_slice ... ok
[INFO] [stdout] test test_comparison_operators_concurrent ... ok
[INFO] [stdout] test test_chained_borrows_across_threads ... ok
[INFO] [stdout] test test_complete_lifecycle ... ok
[INFO] [stdout] test test_concurrent_downcast ... ok
[INFO] [stdout] test test_alternating_readers_writers ... ok
[INFO] [stdout] test test_clone_during_high_contention ... ok
[INFO] [stdout] test test_concurrent_clone_and_drop ... ok
[INFO] [stdout] test test_concurrent_drop ... ok
[INFO] [stdout] test test_cascading_clones ... ok
[INFO] [stdout] test test_concurrent_cloning ... ok
[INFO] [stdout] test test_concurrent_ptr_eq ... ok
[INFO] [stdout] test test_concurrent_slice_access ... ok
[INFO] [stdout] test test_concurrent_string_operations ... ok
[INFO] [stdout] test test_concurrent_count_tracking ... ok
[INFO] [stdout] test test_concurrent_clone_during_writes ... ok
[INFO] [stdout] test test_cross_thread_mutation ... ok
[INFO] [stdout] test test_debug_display_concurrent ... ok
[INFO] [stdout] test test_deep_clone_chain ... ok
[INFO] [stdout] test test_concurrent_leak_and_from_raw ... ok
[INFO] [stdout] test test_default_initialization ... ok
[INFO] [stdout] test test_concurrent_count_observations ... ok
[INFO] [stdout] test test_downcast ... ok
[INFO] [stdout] test test_count_during_concurrent_operations ... ok
[INFO] [stdout] test test_clone_drop_interleaved ... ok
[INFO] [stdout] test test_drop_order_independence ... ok
[INFO] [stdout] test test_alternating_try_borrow_and_borrow ... ok
[INFO] [stdout] test test_clone_count_stability ... ok
[INFO] [stdout] test test_complex_multi_phase_operation ... ok
[INFO] [stdout] test test_contention_with_try_borrow ... ok
[INFO] [stdout] test test_happens_before_relationship ... ok
[INFO] [stdout] test test_barrier_synchronized_operations ... ok
[INFO] [stdout] test test_empty_string_concurrent ... ok
[INFO] [stdout] test test_extreme_contention ... ok
[INFO] [stdout] test test_interleaved_borrow_and_clone ... ok
[INFO] [stdout] test test_hierarchical_thread_tree ... ok
[INFO] [stdout] test test_maximum_practical_clones ... ok
[INFO] [stdout] test test_high_frequency_operations ... ok
[INFO] [stdout] test test_concurrent_vec_operations ... ok
[INFO] [stdout] test test_configuration_update_pattern ... ok
[INFO] [stdout] test test_mixed_sized_unsized_operations ... ok
[INFO] [stdout] test test_multiple_writer_visibility ... ok
[INFO] [stdout] test test_condvar_like_pattern ... ok
[INFO] [stdout] test test_dependency_chain ... ok
[INFO] [stdout] test test_option_concurrent_mutations ... ok
[INFO] [stdout] test test_ping_pong_pattern ... ok
[INFO] [stdout] test test_mixed_operation_stress ... ok
[INFO] [stdout] test test_many_threads_reading ... ok
[INFO] [stdout] test test_producer_consumer_pattern ... ok
[INFO] [stdout] test test_borrow_across_thread_lifetime ... ok
[INFO] [stdout] test test_reference_count_accuracy ... ok
[INFO] [stdout] test test_rapid_borrow_release ... ok
[INFO] [stdout] test test_send_sync_bounds ... ok
[INFO] [stdout] test test_blocking_borrow ... ok
[INFO] [stdout] test test_recursive_clone_tree ... ok
[INFO] [stdout] test test_simple_cross_thread_clone ... ok
[INFO] [stdout] test test_sequential_consistency ... ok
[INFO] [stdout] test test_resilience_to_thread_termination ... ok
[INFO] [stdout] test test_scoped_thread_lifetime ... ok
[INFO] [stdout] test test_thin_cell_borrow_read ... ok
[INFO] [stdout] test test_thin_cell_borrow_write ... ok
[INFO] [stdout] test test_thin_cell_clone ... ok
[INFO] [stdout] test test_thin_cell_clone_shared_data ... ok
[INFO] [stdout] test test_thin_cell_double_borrow_fails ... ok
[INFO] [stdout] test test_thin_cell_count_after_borrow ... ok
[INFO] [stdout] test test_thin_cell_drop_reduces_count ... ok
[INFO] [stdout] test test_thin_cell_leak_and_from_raw ... ok
[INFO] [stdout] test test_thin_cell_multiple_clones ... ok
[INFO] [stdout] test test_thin_cell_new ... ok
[INFO] [stdout] test test_thin_cell_sequential_borrows ... ok
[INFO] [stdout] test test_spinlock_under_contention ... ok
[INFO] [stdout] test test_thin_cell_ref_deref ... ok
[INFO] [stdout] test test_thin_cell_ref_deref_mut ... ok
[INFO] [stdout] test test_thin_cell_try_borrow_failure ... ok
[INFO] [stdout] test test_thin_cell_try_borrow_success ... ok
[INFO] [stdout] test test_thin_cell_with_option ... ok
[INFO] [stdout] test test_thin_cell_with_tuple ... ok
[INFO] [stdout] test test_thin_rc ... ok
[INFO] [stdout] test test_try_unwrap_single_owner ... ok
[INFO] [stdout] test test_try_unwrap_multiple_owners ... ok
[INFO] [stdout] test test_try_unwrap_while_borrowed ... ok
[INFO] [stdout] test test_tuple_concurrent_access ... ok
[INFO] [stdout] test test_drop_while_borrowed_in_other_thread ... ok
[INFO] [stdout] test test_unsize_operations_concurrent ... ok
[INFO] [stdout] test test_thread_safety_invariants ... ok
[INFO] [stdout] test test_massive_thread_spawn ... ok
[INFO] [stdout] test test_no_use_after_free ... ok
[INFO] [stdout] test test_yield_during_contention ... ok
[INFO] [stdout] test test_many_threads_sequential_writing ... ok
[INFO] [stdout] test test_concurrent_try_unwrap ... ok
[INFO] [stdout] test test_multi_way_ping_pong ... ok
[INFO] [stdout] test test_sequential_borrow_across_threads ... ok
[INFO] [stdout] test test_no_starvation ... ok
[INFO] [stdout] test test_try_borrow_concurrent ... ok
[INFO] [stdout] test test_panic_during_borrow ... ok
[INFO] [stdout] test test_panic_in_one_thread_doesnt_affect_others ... ok
[INFO] [stdout] test test_ultimate_stress_test ... ok
[INFO] [stdout] test test_worker_pool_pattern ... ok
[INFO] [stdout] test test_round_robin_access ... ok
[INFO] [stdout] test test_long_held_borrows ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 102 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.72s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/unsync.rs (/opt/rustwide/target/debug/deps/unsync-002d4316c158ebb6)
[INFO] [stdout] 
[INFO] [stdout] running 21 tests
[INFO] [stdout] test test_coerce_slice ... ok
[INFO] [stdout] test test_downcast ... ok
[INFO] [stdout] test test_thin_cell_borrow_read ... ok
[INFO] [stdout] test test_cast_back ... ok
[INFO] [stdout] test test_thin_cell_clone_shared_data ... ok
[INFO] [stdout] test test_thin_cell_clone ... ok
[INFO] [stdout] test test_thin_cell_count_after_borrow ... ok
[INFO] [stdout] test test_thin_cell_double_borrow_fails ... ok
[INFO] [stdout] test test_thin_cell_multiple_clones ... ok
[INFO] [stdout] test test_thin_cell_drop_reduces_count ... ok
[INFO] [stdout] test test_thin_cell_leak_and_from_raw ... ok
[INFO] [stdout] test test_thin_cell_ref_deref ... ok
[INFO] [stdout] test test_thin_cell_new ... ok
[INFO] [stdout] test test_thin_cell_ref_deref_mut ... ok
[INFO] [stdout] test test_thin_cell_try_borrow_failure ... ok
[INFO] [stdout] test test_thin_cell_with_tuple ... ok
[INFO] [stdout] test test_thin_cell_sequential_borrows ... ok
[INFO] [stdout] test test_thin_cell_try_borrow_success ... ok
[INFO] [stdout] test test_thin_rc ... ok
[INFO] [stdout] test test_thin_cell_with_option ... ok
[INFO] [stdout] test test_thin_cell_borrow_write ... ok
[INFO] [stderr]    Doc-tests thin_cell
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 21 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 10 tests
[INFO] [stdout] test src/../README.md - (line 28) ... ignored
[INFO] [stdout] test src/../README.md - (line 49) ... ok
[INFO] [stdout] test src/../README.md - (line 129) ... ok
[INFO] [stdout] test src/lib.rs - sync::ThinCell<T>::borrow (line 220) ... ok
[INFO] [stdout] test src/../README.md - (line 94) ... ok
[INFO] [stdout] test src/lib.rs - unsync::ThinCell<T>::try_borrow (line 254) ... ok
[INFO] [stdout] test src/lib.rs - sync::ThinCell<T>::try_borrow (line 254) ... ok
[INFO] [stdout] test src/lib.rs - unsync::ThinCell<T>::borrow (line 220) ... ok
[INFO] [stdout] test src/../README.md - (line 118) - should panic ... ok
[INFO] [stdout] test src/../README.md - (line 73) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 9 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.58s; merged doctests compilation took 0.49s
[INFO] running `Command { std: "docker" "inspect" "8526b7cd78c7f142cbd8b5f8f40b34b4974e510d89cff57354084ea8540a419c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8526b7cd78c7f142cbd8b5f8f40b34b4974e510d89cff57354084ea8540a419c", kill_on_drop: false }`
[INFO] [stdout] 8526b7cd78c7f142cbd8b5f8f40b34b4974e510d89cff57354084ea8540a419c