[INFO] fetching crate cargo-mutants 25.3.1...
[INFO] testing cargo-mutants-25.3.1 against beta-2025-09-21 for beta-1.91-2
[INFO] extracting crate cargo-mutants 25.3.1 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate cargo-mutants 25.3.1
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate cargo-mutants 25.3.1
[INFO] tweaked toml for crates.io crate cargo-mutants 25.3.1 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-mutants 25.3.1 on toolchain beta-2025-09-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cargo-mutants 25.3.1 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" "+beta-2025-09-21" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9d4c69a47103cbd9b393cd55eb85017574df872180983556d168aa0d11e5f172
[INFO] running `Command { std: "docker" "start" "-a" "9d4c69a47103cbd9b393cd55eb85017574df872180983556d168aa0d11e5f172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9d4c69a47103cbd9b393cd55eb85017574df872180983556d168aa0d11e5f172", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d4c69a47103cbd9b393cd55eb85017574df872180983556d168aa0d11e5f172", kill_on_drop: false }`
[INFO] [stdout] 9d4c69a47103cbd9b393cd55eb85017574df872180983556d168aa0d11e5f172
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf2f3578df896e089e1bd623b4dcd0f1697afc056a233574d3676418e4415214
[INFO] running `Command { std: "docker" "start" "-a" "cf2f3578df896e089e1bd623b4dcd0f1697afc056a233574d3676418e4415214", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.16
[INFO] [stderr]    Compiling libc v0.2.174
[INFO] [stderr]    Compiling serde v1.0.209
[INFO] [stderr]    Compiling log v0.4.25
[INFO] [stderr]    Compiling bitflags v2.8.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]    Compiling tracing-core v0.1.33
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling rustix v0.37.28
[INFO] [stderr]    Compiling camino v1.1.9
[INFO] [stderr]    Compiling rustversion v1.0.19
[INFO] [stderr]    Compiling guppy-workspace-hack v0.1.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling thiserror v1.0.65
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling semver v1.0.25
[INFO] [stderr]    Compiling nextest-workspace-hack v0.1.0
[INFO] [stderr]    Compiling target-spec v3.2.2
[INFO] [stderr]    Compiling indexmap v2.7.1
[INFO] [stderr]    Compiling deranged v0.4.0
[INFO] [stderr]    Compiling tracing-log v0.2.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling env_filter v0.1.3
[INFO] [stderr]    Compiling quote v1.0.35
[INFO] [stderr]    Compiling bstr v1.11.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling cfg-expr v0.17.2
[INFO] [stderr]    Compiling time-core v0.1.4
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling iana-time-zone v0.1.61
[INFO] [stderr]    Compiling anyhow v1.0.86
[INFO] [stderr]    Compiling bytecount v0.6.8
[INFO] [stderr]    Compiling crossbeam-deque v0.8.6
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling nom_locate v4.2.0
[INFO] [stderr]    Compiling chrono v0.4.39
[INFO] [stderr]    Compiling time v0.3.41
[INFO] [stderr]    Compiling env_logger v0.11.6
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling dyn-clone v1.0.19
[INFO] [stderr]    Compiling fastrand v2.0.0
[INFO] [stderr]    Compiling yansi v0.5.1
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling mutants v0.0.3
[INFO] [stderr]    Compiling whoami v1.5.0
[INFO] [stderr]    Compiling indoc v2.0.0
[INFO] [stderr]    Compiling similar v2.1.0
[INFO] [stderr]    Compiling path-slash v0.2.0
[INFO] [stderr]    Compiling io-lifetimes v1.0.11
[INFO] [stderr]    Compiling parking_lot_core v0.9.10
[INFO] [stderr]    Compiling terminal_size v0.1.17
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling jobserver v0.1.0
[INFO] [stderr]    Compiling fs2 v0.4.0
[INFO] [stderr]    Compiling parking_lot v0.12.3
[INFO] [stderr]    Compiling num_cpus v1.16.0
[INFO] [stderr]    Compiling patch v0.7.0
[INFO] [stderr]    Compiling terminal_size v0.4.1
[INFO] [stderr]    Compiling tempfile v3.8.0
[INFO] [stderr]    Compiling clap_builder v4.5.27
[INFO] [stderr]    Compiling terminal_size v0.2.6
[INFO] [stderr]    Compiling nutmeg v0.1.4
[INFO] [stderr]    Compiling regex v1.10.0
[INFO] [stderr]    Compiling globset v0.4.16
[INFO] [stderr]    Compiling ignore v0.4.23
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling ctrlc v3.4.7
[INFO] [stderr]    Compiling serde_derive_internals v0.29.1
[INFO] [stderr]    Compiling serde_derive v1.0.209
[INFO] [stderr]    Compiling tracing-attributes v0.1.28
[INFO] [stderr]    Compiling thiserror-impl v1.0.65
[INFO] [stderr]    Compiling ref-cast-impl v1.0.24
[INFO] [stderr]    Compiling clap_derive v4.5.28
[INFO] [stderr]    Compiling test-log-macros v0.2.17
[INFO] [stderr]    Compiling strum_macros v0.26.4
[INFO] [stderr]    Compiling color-print-proc-macro v0.3.7
[INFO] [stderr]    Compiling schemars_derive v0.9.0
[INFO] [stderr]    Compiling ref-cast v1.0.24
[INFO] [stderr]    Compiling color-print v0.3.1
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling strum v0.26.0
[INFO] [stderr]    Compiling clap v4.5.28
[INFO] [stderr]    Compiling clap_complete v4.0.0
[INFO] [stderr]    Compiling test-log v0.2.16
[INFO] [stderr]    Compiling tracing-appender v0.2.3
[INFO] [stderr]    Compiling toml_datetime v0.6.8
[INFO] [stderr]    Compiling serde_spanned v0.6.8
[INFO] [stderr]    Compiling smol_str v0.3.2
[INFO] [stderr]    Compiling cargo-platform v0.1.9
[INFO] [stderr]    Compiling toml_edit v0.20.7
[INFO] [stderr]    Compiling schemars v0.9.0
[INFO] [stderr]    Compiling cargo_metadata v0.19.0
[INFO] [stderr]    Compiling nextest-metadata v0.12.1
[INFO] [stderr]    Compiling toml v0.8.0
[INFO] [stderr]    Compiling cargo-mutants v25.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.68s
[INFO] running `Command { std: "docker" "inspect" "cf2f3578df896e089e1bd623b4dcd0f1697afc056a233574d3676418e4415214", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf2f3578df896e089e1bd623b4dcd0f1697afc056a233574d3676418e4415214", kill_on_drop: false }`
[INFO] [stdout] cf2f3578df896e089e1bd623b4dcd0f1697afc056a233574d3676418e4415214
[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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-09-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f1e84ff8fe897b0ac359b41d6336f961be65f2db6c8ea49be18d1599b6b775f9
[INFO] running `Command { std: "docker" "start" "-a" "f1e84ff8fe897b0ac359b41d6336f961be65f2db6c8ea49be18d1599b6b775f9", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex-automata v0.4.9
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling yaml-rust v0.4.5
[INFO] [stderr]    Compiling float-cmp v0.10.0
[INFO] [stderr]    Compiling wait-timeout v0.2.1
[INFO] [stderr]    Compiling similar v2.1.0
[INFO] [stderr]    Compiling filetime v0.2.25
[INFO] [stderr]    Compiling rusty-fork v0.3.0
[INFO] [stderr]    Compiling cp_r v0.5.2
[INFO] [stderr]    Compiling serde_yaml v0.8.26
[INFO] [stderr]    Compiling regex v1.10.0
[INFO] [stderr]    Compiling bstr v1.11.3
[INFO] [stderr]    Compiling tracing-subscriber v0.3.19
[INFO] [stderr]    Compiling console v0.15.0
[INFO] [stderr]    Compiling predicates v3.1.3
[INFO] [stderr]    Compiling globset v0.4.16
[INFO] [stderr]    Compiling insta v1.12.0
[INFO] [stderr]    Compiling assert_cmd v2.0.17
[INFO] [stderr]    Compiling ignore v0.4.23
[INFO] [stderr]    Compiling test-log v0.2.16
[INFO] [stderr]    Compiling tracing-appender v0.2.3
[INFO] [stderr]    Compiling cargo-mutants v25.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `cargo-mutants` (bin "cargo-mutants")
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2025-09-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name cargo_mutants --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values())' -C metadata=6ba0be9b2d11f3b8 -C extra-filename=-6b537e467cc2928f --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-bab7366809509fd1.rlib --extern camino=/opt/rustwide/target/debug/deps/libcamino-04c150472b9018d9.rlib --extern cargo_metadata=/opt/rustwide/target/debug/deps/libcargo_metadata-3b4b6a4de66e0c5f.rlib --extern clap=/opt/rustwide/target/debug/deps/libclap-9e3804f4136a92d0.rlib --extern clap_complete=/opt/rustwide/target/debug/deps/libclap_complete-0422f15cd847a1b8.rlib --extern color_print=/opt/rustwide/target/debug/deps/libcolor_print-02d8625e50ac5f6e.rlib --extern console=/opt/rustwide/target/debug/deps/libconsole-37b76684cf6fcaf4.rlib --extern ctrlc=/opt/rustwide/target/debug/deps/libctrlc-7735b56c153f05c5.rlib --extern fastrand=/opt/rustwide/target/debug/deps/libfastrand-79fabc4010fbc3df.rlib --extern fs2=/opt/rustwide/target/debug/deps/libfs2-828ebed323400dff.rlib --extern globset=/opt/rustwide/target/debug/deps/libglobset-3a3ae76232df82df.rlib --extern humantime=/opt/rustwide/target/debug/deps/libhumantime-9f900d7885b5087e.rlib --extern ignore=/opt/rustwide/target/debug/deps/libignore-882c4eb4991fa430.rlib --extern indoc=/opt/rustwide/target/debug/deps/libindoc-afab851c8deaec7f.so --extern itertools=/opt/rustwide/target/debug/deps/libitertools-858108c2e3b28bab.rlib --extern jobserver=/opt/rustwide/target/debug/deps/libjobserver-25b363d872c6a5b1.rlib --extern mutants=/opt/rustwide/target/debug/deps/libmutants-518f8a4dc1abeb79.so --extern nextest_metadata=/opt/rustwide/target/debug/deps/libnextest_metadata-30b3d78cc29d4054.rlib --extern nix=/opt/rustwide/target/debug/deps/libnix-127bb327eef2b943.rlib --extern num_cpus=/opt/rustwide/target/debug/deps/libnum_cpus-58603e499dfde68b.rlib --extern nutmeg=/opt/rustwide/target/debug/deps/libnutmeg-f93c1ca96f65691b.rlib --extern patch=/opt/rustwide/target/debug/deps/libpatch-5d0f5ee93180bb50.rlib --extern path_slash=/opt/rustwide/target/debug/deps/libpath_slash-b044588789468498.rlib --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-50ded56212b4c1ae.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-ccb9156ab8c0da76.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-d187d6cad5eed1b4.rlib --extern schemars=/opt/rustwide/target/debug/deps/libschemars-b9bff775925651a8.rlib --extern serde=/opt/rustwide/target/debug/deps/libserde-89f579c64d9ef529.rlib --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-7fff0e4045597a51.rlib --extern similar=/opt/rustwide/target/debug/deps/libsimilar-ccf5d68730553538.rlib --extern strum=/opt/rustwide/target/debug/deps/libstrum-71887ef71347a129.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-8af3da8f507e9937.rlib --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-0dfe42332488aee6.rlib --extern test_log=/opt/rustwide/target/debug/deps/libtest_log-7b9b8ef0d9a1a396.rlib --extern time=/opt/rustwide/target/debug/deps/libtime-1f387e20861f9ba1.rlib --extern toml=/opt/rustwide/target/debug/deps/libtoml-5d3d25071f1427ff.rlib --extern tracing=/opt/rustwide/target/debug/deps/libtracing-4bfba7113263dc54.rlib --extern tracing_appender=/opt/rustwide/target/debug/deps/libtracing_appender-f0ab86ccc52c8d75.rlib --extern tracing_subscriber=/opt/rustwide/target/debug/deps/libtracing_subscriber-240e7737d734e900.rlib --extern whoami=/opt/rustwide/target/debug/deps/libwhoami-af6231779e9230ce.rlib --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f1e84ff8fe897b0ac359b41d6336f961be65f2db6c8ea49be18d1599b6b775f9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1e84ff8fe897b0ac359b41d6336f961be65f2db6c8ea49be18d1599b6b775f9", kill_on_drop: false }`
[INFO] [stdout] f1e84ff8fe897b0ac359b41d6336f961be65f2db6c8ea49be18d1599b6b775f9