[INFO] fetching crate mutringbuf 0.5.4...
[INFO] testing mutringbuf-0.5.4 against 1.91.0 for beta-1.92-2
[INFO] extracting crate mutringbuf 0.5.4 into /workspace/builds/worker-1-tc1/source
[INFO] started tweaking crates.io crate mutringbuf 0.5.4
[INFO] removed 0 missing examples
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate mutringbuf 0.5.4
[INFO] tweaked toml for crates.io crate mutringbuf 0.5.4 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mutringbuf 0.5.4 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mutringbuf 0.5.4 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" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded windows-targets v0.53.4
[INFO] [stderr]   Downloaded terminal_size v0.4.3
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.54
[INFO] [stderr]   Downloaded objc2-core-audio-types v0.3.1
[INFO] [stderr]   Downloaded objc2-core-audio v0.3.1
[INFO] [stderr]   Downloaded gungraun-macros v0.7.0
[INFO] [stderr]   Downloaded cpal v0.16.0
[INFO] [stderr]   Downloaded coreaudio-rs v0.13.0
[INFO] [stderr]   Downloaded gungraun v0.17.0
[INFO] [stderr]   Downloaded gungraun-runner v0.17.0
[INFO] [stderr]   Downloaded objc2-audio-toolbox v0.3.1
[INFO] [stderr]   Downloaded objc2 v0.6.2
[INFO] [stderr]   Downloaded regex-lite v0.1.7
[INFO] [stderr]   Downloaded windows-sys v0.61.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 857f9fb51d055dfdcd89e0154a00f35eee5c3279a699c7ab60bf0afedba130b8
[INFO] running `Command { std: "docker" "start" "-a" "857f9fb51d055dfdcd89e0154a00f35eee5c3279a699c7ab60bf0afedba130b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "857f9fb51d055dfdcd89e0154a00f35eee5c3279a699c7ab60bf0afedba130b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "857f9fb51d055dfdcd89e0154a00f35eee5c3279a699c7ab60bf0afedba130b8", kill_on_drop: false }`
[INFO] [stdout] 857f9fb51d055dfdcd89e0154a00f35eee5c3279a699c7ab60bf0afedba130b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cff3fda0032ea0dd54163e43ce6a020a0145e84f5b07450cd9dcfa71cd25ead9
[INFO] running `Command { std: "docker" "start" "-a" "cff3fda0032ea0dd54163e43ce6a020a0145e84f5b07450cd9dcfa71cd25ead9", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling mutringbuf v0.5.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `Command { std: "docker" "inspect" "cff3fda0032ea0dd54163e43ce6a020a0145e84f5b07450cd9dcfa71cd25ead9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cff3fda0032ea0dd54163e43ce6a020a0145e84f5b07450cd9dcfa71cd25ead9", kill_on_drop: false }`
[INFO] [stdout] cff3fda0032ea0dd54163e43ce6a020a0145e84f5b07450cd9dcfa71cd25ead9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4aeb061188ec81ea83c79e0b0dcc18e772668ecd7a98e97120724cc38c9118b2
[INFO] running `Command { std: "docker" "start" "-a" "4aeb061188ec81ea83c79e0b0dcc18e772668ecd7a98e97120724cc38c9118b2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.101
[INFO] [stderr]    Compiling unicode-ident v1.0.19
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling bitflags v2.9.4
[INFO] [stderr]    Compiling semver v1.0.27
[INFO] [stderr]    Compiling gungraun-runner v0.17.0
[INFO] [stderr]    Compiling anstyle v1.0.13
[INFO] [stderr]    Compiling libc v0.2.176
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling gungraun v0.17.0
[INFO] [stderr]    Compiling regex-lite v0.1.7
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling rustc_version v0.4.1
[INFO] [stderr]    Compiling gungraun-macros v0.7.0
[INFO] [stderr]    Compiling quote v1.0.41
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]    Compiling terminal_size v0.4.3
[INFO] [stderr]    Compiling clap_builder v4.5.48
[INFO] [stderr]    Compiling clap v4.5.48
[INFO] [stderr]    Compiling proc-macro-error2 v2.0.1
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling derive_more-impl v2.0.1
[INFO] [stderr]    Compiling divan-macros v0.1.21
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling divan v0.1.21
[INFO] [stderr]    Compiling derive_more v2.0.1
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling bincode v1.3.3
[INFO] [stderr]    Compiling mutringbuf v0.5.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 37.17s
[INFO] running `Command { std: "docker" "inspect" "4aeb061188ec81ea83c79e0b0dcc18e772668ecd7a98e97120724cc38c9118b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4aeb061188ec81ea83c79e0b0dcc18e772668ecd7a98e97120724cc38c9118b2", kill_on_drop: false }`
[INFO] [stdout] 4aeb061188ec81ea83c79e0b0dcc18e772668ecd7a98e97120724cc38c9118b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a41ea20c490dbb0b6ae2df3e5d9d6106ce383426e14af05c367d0679932d86aa
[INFO] running `Command { std: "docker" "start" "-a" "a41ea20c490dbb0b6ae2df3e5d9d6106ce383426e14af05c367d0679932d86aa", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.16s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/mutringbuf-17e4c0d6fe61a153)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test iterators::sync_iterators::cons_iter::test::cached_avail ... ok
[INFO] [stderr]      Running tests/tests.rs (/opt/rustwide/target/debug/deps/tests-1c3a80d8b588274d)
[INFO] [stdout] test iterators::sync_iterators::prod_iter::test::cached_avail ... ok
[INFO] [stdout] test ring_buffer::storage::heap::test::from_tests ... ok
[INFO] [stdout] test ring_buffer::storage::stack::test::from_tests ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 33 tests
[INFO] [stdout] test common::new_buf::test_new_buf ... ok
[INFO] [stdout] test common::uninit_buf::test_uninit ... ok
[INFO] [stdout] test sync_tests::cons_tests::test_pop_ref_exact ... ok
[INFO] [stdout] test sync_tests::cons_tests::test_pop_slice_copy ... ok
[INFO] [stdout] test sync_tests::cons_tests::test_pop_slice_exact ... ok
[INFO] [stdout] test sync_tests::cons_tests::test_pop_slice_seam ... ok
[INFO] [stdout] test sync_tests::cons_tests::test_pop_avail_nw_exact ... ok
[INFO] [stdout] test common::stack::test_local_stack ... ok
[INFO] [stdout] test sync_tests::detached_work_tests::test_work_detached_sync_index ... ok
[INFO] [stdout] test sync_tests::detached_work_tests::test_work_go_back ... ok
[INFO] [stdout] test sync_tests::detached_work_tests::test_work_detached_set_index ... ok
[INFO] [stdout] test sync_tests::cons_tests::test_pop_exact ... ok
[INFO] [stdout] test sync_tests::drop::drop_everything ... ok
[INFO] [stdout] test sync_tests::detached_work_tests::test_work_detached ... ok
[INFO] [stdout] test sync_tests::drop::prod_drop_test ... ok
[INFO] [stdout] test sync_tests::drop::work_drop_test ... ok
[INFO] [stdout] test sync_tests::integration_tests::test_push_work_pop_single ... ok
[INFO] [stdout] test sync_tests::drop::cons_drop_test ... ok
[INFO] [stdout] test sync_tests::integration_tests::test_reset ... ok
[INFO] [stdout] test sync_tests::prod_tests::test_push_mut_ref ... ok
[INFO] [stdout] test sync_tests::prod_tests::test_push_mut_ref_init ... ok
[INFO] [stdout] test sync_tests::prod_tests::test_push_one_by_one ... ok
[INFO] [stdout] test sync_tests::prod_tests::test_push_slice ... ok
[INFO] [stdout] test sync_tests::work_tests::test_work_exact ... ok
[INFO] [stdout] test sync_tests::work_tests::test_work_mul ... ok
[INFO] [stdout] test sync_tests::work_tests::test_work_single ... ok
[INFO] [stdout] test sync_tests::integration_tests::test_push_work_pop_slice ... ok
[INFO] [stdout] test len_zero_heap - should panic ... ok
[INFO] [stdout] test len_zero_stack - should panic ... ok
[INFO] [stdout] test sync_tests::concurrent_fib::fibonacci_test ... ok
[INFO] [stdout] test common::stack::fibonacci_test_stack ... ok
[INFO] [stdout] test sync_tests::multithreading::test_mt_workable ... ok
[INFO] [stdout] test sync_tests::multithreading::test_mt_non_workable ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 33 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 6.06s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests mutringbuf
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:18
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![cfg_attr(doc, feature(doc_cfg))]
[INFO] [stderr]   |                  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 1 previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: doctest failed, to rerun pass `--doc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.91.0-x86_64-unknown-linux-gnu/bin/rustdoc --edition=2024 --crate-type lib --color auto --crate-name mutringbuf --test src/lib.rs --test-run-directory /opt/rustwide/workdir -L dependency=/opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --warn=unexpected_cfgs --check-cfg 'cfg(cpal)' --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-f0b9d9324c108204.rlib --extern divan=/opt/rustwide/target/debug/deps/libdivan-ec62f859e15e8d3e.rlib --extern gungraun=/opt/rustwide/target/debug/deps/libgungraun-a49fe71b10f1a353.rlib --extern libc=/opt/rustwide/target/debug/deps/liblibc-1e38e2428975b5a3.rlib --extern mutringbuf=/opt/rustwide/target/debug/deps/libmutringbuf-7df73b5de5f76ef9.rlib --extern tokio=/opt/rustwide/target/debug/deps/libtokio-d96de6db50b5548c.rlib -C embed-bitcode=no --cfg 'feature="alloc"' --cfg 'feature="default"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("alloc", "async", "default", "vmem"))' --cap-lints=warn --error-format human` (exit status: 1)
[INFO] [stderr] note: test exited abnormally; to see the full output pass --no-capture to the harness.
[INFO] running `Command { std: "docker" "inspect" "a41ea20c490dbb0b6ae2df3e5d9d6106ce383426e14af05c367d0679932d86aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a41ea20c490dbb0b6ae2df3e5d9d6106ce383426e14af05c367d0679932d86aa", kill_on_drop: false }`
[INFO] [stdout] a41ea20c490dbb0b6ae2df3e5d9d6106ce383426e14af05c367d0679932d86aa