[INFO] fetching crate prefix-arena 0.1.0...
[INFO] testing prefix-arena-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate prefix-arena 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate prefix-arena 0.1.0
[INFO] finished tweaking crates.io crate prefix-arena 0.1.0
[INFO] tweaked toml for crates.io crate prefix-arena 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate prefix-arena 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 prefix-arena 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-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0c810ea7c92dfd34700aa5df80a45d9fb73d8682d27bd07f7d39ab07f20c99ec
[INFO] running `Command { std: "docker" "start" "-a" "0c810ea7c92dfd34700aa5df80a45d9fb73d8682d27bd07f7d39ab07f20c99ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0c810ea7c92dfd34700aa5df80a45d9fb73d8682d27bd07f7d39ab07f20c99ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0c810ea7c92dfd34700aa5df80a45d9fb73d8682d27bd07f7d39ab07f20c99ec", kill_on_drop: false }`
[INFO] [stdout] 0c810ea7c92dfd34700aa5df80a45d9fb73d8682d27bd07f7d39ab07f20c99ec
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 183d9ee9f4f9938d6cb84901d2235f333899b9c10ac342c923d6bb5548888082
[INFO] running `Command { std: "docker" "start" "-a" "183d9ee9f4f9938d6cb84901d2235f333899b9c10ac342c923d6bb5548888082", kill_on_drop: false }`
[INFO] [stderr]    Compiling prefix-arena v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.22s
[INFO] running `Command { std: "docker" "inspect" "183d9ee9f4f9938d6cb84901d2235f333899b9c10ac342c923d6bb5548888082", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "183d9ee9f4f9938d6cb84901d2235f333899b9c10ac342c923d6bb5548888082", kill_on_drop: false }`
[INFO] [stdout] 183d9ee9f4f9938d6cb84901d2235f333899b9c10ac342c923d6bb5548888082
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c4073e48822bb4c873997cadbbaf3540bbf1813e66b1347eba9af1808bcc882f
[INFO] running `Command { std: "docker" "start" "-a" "c4073e48822bb4c873997cadbbaf3540bbf1813e66b1347eba9af1808bcc882f", kill_on_drop: false }`
[INFO] [stderr]    Compiling prefix-arena v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "c4073e48822bb4c873997cadbbaf3540bbf1813e66b1347eba9af1808bcc882f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4073e48822bb4c873997cadbbaf3540bbf1813e66b1347eba9af1808bcc882f", kill_on_drop: false }`
[INFO] [stdout] c4073e48822bb4c873997cadbbaf3540bbf1813e66b1347eba9af1808bcc882f
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2649f054c8263c4b0dcc5a93faa4707b2b182a35c8bf704cafd48b938eaa9ee8
[INFO] running `Command { std: "docker" "start" "-a" "2649f054c8263c4b0dcc5a93faa4707b2b182a35c8bf704cafd48b938eaa9ee8", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/prefix_arena-d58f40d775b323b4)
[INFO] [stdout] 
[INFO] [stdout] running 45 tests
[INFO] [stdout] test prefix_arena::tests::subsequent_take_remaining ... ok
[INFO] [stdout] test prefix_arena::tests::test_empty_buffer_for_temporary_buffer ... ok
[INFO] [stdout] test prefix_arena::tests::test_empty_buffer ... ok
[INFO] [stdout] test prefix_arena::tests::test_from_array_for_temporary_buffer ... ok
[INFO] [stdout] test prefix_arena::tests::test_from_array ... ok
[INFO] [stdout] test prefix_arena::tests::test_from_uninitialized_slice ... ok
[INFO] [stdout] test prefix_arena::tests::test_head_arena_init_then_acquire_with ... ok
[INFO] [stdout] test prefix_arena::tests::test_from_slice ... ok
[INFO] [stdout] test prefix_arena::tests::test_init_from_uninitialized ... ok
[INFO] [stdout] test prefix_arena::tests::test_multiple_take_fronts ... ok
[INFO] [stdout] test prefix_arena::tests::test_init_from_initialized ... ok
[INFO] [stdout] test prefix_arena::tests::test_no_borrowing_glue_with_temp_buffer_detach ... ok
[INFO] [stdout] test prefix_arena::tests::test_no_borrowing_glue ... ok
[INFO] [stdout] test prefix_arena::tests::test_take_front_zero ... ok
[INFO] [stdout] test prefix_arena::tests::test_take_remaining ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_as_mut_slice ... ok
[INFO] [stdout] test prefix_arena::tests::test_usage_in_a_loop ... ok
[INFO] [stdout] test prefix_arena::tests::test_take_front_partial ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_as_slice ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_init_then_acquire_with_error_preserves_arena ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_as_mut_slice_unchecked ... ok
[INFO] [stdout] test staging_buffer::tests::test_append_from_slice ... ok
[INFO] [stdout] test staging_buffer::tests::test_capacity_overflow ... ok
[INFO] [stdout] test staging_buffer::tests::test_as_mut_slice ... ok
[INFO] [stdout] test staging_buffer::tests::test_extend_empty_slice ... ok
[INFO] [stdout] test staging_buffer::tests::test_basic_push ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_as_slice_unchecked ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_init_then_acquire_with ... ok
[INFO] [stdout] test prefix_arena::tests::test_take_front_all ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_as_mut_with_init ... ok
[INFO] [stdout] test staging_buffer::tests::test_extend_at_exact_capacity ... ok
[INFO] [stdout] test staging_buffer::tests::test_push_until_full ... ok
[INFO] [stdout] test staging_buffer::tests::test_multiple_extension ... ok
[INFO] [stdout] test staging_buffer::tests::test_single_byte_buffer ... ok
[INFO] [stdout] test staging_buffer::tests::test_clear_and_reuse ... ok
[INFO] [stdout] test staging_buffer::tests::test_append_from_slice_partial ... ok
[INFO] [stdout] test staging_buffer::tests::test_as_slice_lifetime ... ok
[INFO] [stdout] test staging_buffer::tests::test_clear ... ok
[INFO] [stdout] test staging_buffer::tests::test_empty_buffer ... ok
[INFO] [stdout] test staging_buffer::tests::test_fill_remaining_empty_slice ... ok
[INFO] [stdout] test staging_buffer::tests::test_take_used ... ok
[INFO] [stdout] test prefix_arena::tests::test_head_arena_init_then_acquire_with_panics_on_invalid_len - should panic ... ok
[INFO] [stdout] test prefix_arena::tests::test_take_front_too_large - should panic ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_as_mut_with_init_panics_on_invalid_len - should panic ... ok
[INFO] [stdout] test prefix_arena::tests::test_temp_buffer_init_then_acquire_with_panics_on_invalid_len - should panic ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 45 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.03s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests prefix_arena
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 20) ... ok
[INFO] [stdout] test src/lib.rs - (line 38) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stdout] all doctests ran in 0.55s; merged doctests compilation took 0.54s
[INFO] running `Command { std: "docker" "inspect" "2649f054c8263c4b0dcc5a93faa4707b2b182a35c8bf704cafd48b938eaa9ee8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2649f054c8263c4b0dcc5a93faa4707b2b182a35c8bf704cafd48b938eaa9ee8", kill_on_drop: false }`
[INFO] [stdout] 2649f054c8263c4b0dcc5a93faa4707b2b182a35c8bf704cafd48b938eaa9ee8
