[INFO] fetching crate swansong 0.3.4...
[INFO] testing swansong-0.3.4 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate swansong 0.3.4 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate swansong 0.3.4
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate swansong 0.3.4
[INFO] tweaked toml for crates.io crate swansong 0.3.4 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate swansong 0.3.4 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 swansong 0.3.4 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-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 790124f9bc583f84fe96406a89f7242aa9b49dbfc149847cb29f6cb182557fce
[INFO] running `Command { std: "docker" "start" "-a" "790124f9bc583f84fe96406a89f7242aa9b49dbfc149847cb29f6cb182557fce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "790124f9bc583f84fe96406a89f7242aa9b49dbfc149847cb29f6cb182557fce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "790124f9bc583f84fe96406a89f7242aa9b49dbfc149847cb29f6cb182557fce", kill_on_drop: false }`
[INFO] [stdout] 790124f9bc583f84fe96406a89f7242aa9b49dbfc149847cb29f6cb182557fce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 08c53ccc8cf84fafe4c48a4d3c9a6c42653fbfbcf71b1f5eabf9edf79dcbf322
[INFO] running `Command { std: "docker" "start" "-a" "08c53ccc8cf84fafe4c48a4d3c9a6c42653fbfbcf71b1f5eabf9edf79dcbf322", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling futures-core v0.3.32
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling swansong v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.88s
[INFO] running `Command { std: "docker" "inspect" "08c53ccc8cf84fafe4c48a4d3c9a6c42653fbfbcf71b1f5eabf9edf79dcbf322", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08c53ccc8cf84fafe4c48a4d3c9a6c42653fbfbcf71b1f5eabf9edf79dcbf322", kill_on_drop: false }`
[INFO] [stdout] 08c53ccc8cf84fafe4c48a4d3c9a6c42653fbfbcf71b1f5eabf9edf79dcbf322
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 01b5433a4d60dd140e394964f13eb60dd5e95775f070365344f334358795cfd8
[INFO] running `Command { std: "docker" "start" "-a" "01b5433a4d60dd140e394964f13eb60dd5e95775f070365344f334358795cfd8", kill_on_drop: false }`
[INFO] [stderr]    Compiling fastrand v2.4.1
[INFO] [stderr]    Compiling futures-io v0.3.32
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]    Compiling aho-corasick v1.1.4
[INFO] [stderr]    Compiling concurrent-queue v2.5.0
[INFO] [stderr]    Compiling linux-raw-sys v0.12.1
[INFO] [stderr]    Compiling slab v0.4.12
[INFO] [stderr]    Compiling log v0.4.29
[INFO] [stderr]    Compiling event-listener v5.4.1
[INFO] [stderr]    Compiling lock_api v0.4.14
[INFO] [stderr]    Compiling quote v1.0.44
[INFO] [stderr]    Compiling colorchoice v1.0.4
[INFO] [stderr]    Compiling anstyle v1.0.13
[INFO] [stderr]    Compiling event-listener-strategy v0.5.4
[INFO] [stderr]    Compiling spin v0.9.8
[INFO] [stderr]    Compiling futures-lite v2.6.1
[INFO] [stderr]    Compiling async-channel v2.3.1
[INFO] [stderr]    Compiling piper v0.2.4
[INFO] [stderr]    Compiling anstream v1.0.0
[INFO] [stderr]    Compiling async-lock v3.4.0
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling tokio v1.52.1
[INFO] [stderr]    Compiling jiff v0.2.23
[INFO] [stderr]    Compiling futures-sink v0.3.31
[INFO] [stderr]    Compiling flume v0.12.0
[INFO] [stderr]    Compiling swansong v0.3.4 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling async-executor v1.14.0
[INFO] [stderr]    Compiling blocking v1.6.1
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling tokio-stream v0.1.18
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling test-harness v0.3.1
[INFO] [stderr]    Compiling env_filter v1.0.0
[INFO] [stderr]    Compiling env_logger v0.11.10
[INFO] [stderr]    Compiling polling v3.11.0
[INFO] [stderr]    Compiling async-io v2.6.0
[INFO] [stderr]    Compiling async-global-executor v3.1.0
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 41.65s
[INFO] running `Command { std: "docker" "inspect" "01b5433a4d60dd140e394964f13eb60dd5e95775f070365344f334358795cfd8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01b5433a4d60dd140e394964f13eb60dd5e95775f070365344f334358795cfd8", kill_on_drop: false }`
[INFO] [stdout] 01b5433a4d60dd140e394964f13eb60dd5e95775f070365344f334358795cfd8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 0ae27d26a3347dd5c80359befad2a856594d74287969b804ecca00ee252dbdd3
[INFO] running `Command { std: "docker" "start" "-a" "0ae27d26a3347dd5c80359befad2a856594d74287969b804ecca00ee252dbdd3", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.12s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/swansong-9c04e1e9778a8425)
[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] [stderr]      Running tests/test.rs (/opt/rustwide/target/debug/deps/test-016910f14178ba18)
[INFO] [stdout] running 47 tests
[INFO] [stdout] test eq_and_assorted_other_conveniences ... ok
[INFO] [stdout] test iterator_size_hint ... ok
[INFO] [stdout] test child_with_interrupt ... ok
[INFO] [stdout] test child_created_after_parent_stopped ... ok
[INFO] [stdout] test future ... ok
[INFO] [stdout] test iterator ... ok
[INFO] [stdout] test guarded_test_coverage ... ok
[INFO] [stdout] test iterator_drop ... ok
[INFO] [stdout] test shutting_down_does_not_wait_for_guards ... ok
[INFO] [stdout] test shutting_down_pending_then_ready ... ok
[INFO] [stdout] test shutting_down_ready_immediately_if_already_stopped ... ok
[INFO] [stdout] test shutting_down_resolves_on_parent_stop ... ok
[INFO] [stdout] test shutting_down_resolves_on_root_handle_drop ... ok
[INFO] [stdout] test shutting_down_reuses_listener_across_polls ... ok
[INFO] [stdout] test spec_child_creation_is_transparent ... ok
[INFO] [stdout] test spec_child_handle_drop_does_not_stop_the_child ... ok
[INFO] [stdout] test spec_child_handle_drop_without_guards_is_transparent ... ok
[INFO] [stdout] test spec_child_shutdown_does_not_affect_parent ... ok
[INFO] [stdout] test spec_children_do_not_count_as_guards ... ok
[INFO] [stdout] test spec_guard_count_is_subtree_sum ... ok
[INFO] [stdout] test spec_guard_on_stopped_swansong_delays_completion ... ok
[INFO] [stdout] test spec_guard_outlives_child_handle ... ok
[INFO] [stdout] test spec_guarded_on_discarded_child_equivalent_to_parent ... ok
[INFO] [stdout] test spec_interrupt_on_pinned_child_delegates_after_handle_drop ... ok
[INFO] [stdout] test shutting_down_block_sync ... ok
[INFO] [stdout] test spec_interrupt_terminates_when_child_collected ... ok
[INFO] [stdout] test spec_live_empty_child_does_not_delay_parent_completion ... ok
[INFO] [stdout] test spec_parent_completion_waits_for_subtree_guards ... ok
[INFO] [stdout] test shutting_down_block_with_pre_registered_listener ... ok
[INFO] [stdout] test spec_parent_state_reflects_subtree ... ok
[INFO] [stdout] test spec_root_drop_propagates_downward ... ok
[INFO] [stdout] test spec_shutdown_propagates_downward ... ok
[INFO] [stdout] test spec_shutdown_propagates_through_multi_level ... ok
[INFO] [stdout] test spec_siblings_are_independent ... ok
[INFO] [stdout] test stream ... ok
[INFO] [stdout] test stream_size_hint ... ok
[INFO] [stdout] test stress_deep_tree_concurrent_guards ... ok
[INFO] [stdout] test stress_racing_guard_transitions_on_node ... ok
[INFO] [stdout] test stress_sibling_guards_common_ancestor ... ok
[INFO] [stdout] test stress_child_creation_racing_shutdown ... ok
[INFO] [stdout] test swansong ... ok
[INFO] [stdout] test child_multi_threaded ... ok
[INFO] [stdout] test multi_threaded_stream_guarded ... ok
[INFO] [stdout] test multi_threaded_future_guarded ... ok
[INFO] [stdout] test multi_threaded_blocking ... ok
[INFO] [stdout] test multi_threaded ... ok
[INFO] [stdout] test stress_shutting_down_racing_shutdown ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 47 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.85s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests swansong
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - Swansong::child (line 281) ... ok
[INFO] [stdout] test src/lib.rs - (line 63) ... ok
[INFO] [stdout] test src/lib.rs - (line 47) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.95s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0ae27d26a3347dd5c80359befad2a856594d74287969b804ecca00ee252dbdd3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ae27d26a3347dd5c80359befad2a856594d74287969b804ecca00ee252dbdd3", kill_on_drop: false }`
[INFO] [stdout] 0ae27d26a3347dd5c80359befad2a856594d74287969b804ecca00ee252dbdd3
