[INFO] fetching crate happenstance-testkit 0.4.2...
[INFO] testing happenstance-testkit-0.4.2 against 1.99.0-beta.8+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate happenstance-testkit 0.4.2 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate happenstance-testkit 0.4.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate happenstance-testkit 0.4.2
[INFO] tweaked toml for crates.io crate happenstance-testkit 0.4.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate happenstance-testkit 0.4.2 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate happenstance-testkit 0.4.2 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" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trait-variant v0.1.3
[INFO] [stderr]   Downloaded happenstance-core v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848
[INFO] running `Command { std: "docker" "start" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling thiserror v2.0.19
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]    Compiling futures-core v0.3.33
[INFO] [stderr]    Compiling bytes v1.12.1
[INFO] [stderr]    Compiling trait-variant v0.1.3
[INFO] [stderr]    Compiling happenstance-core v0.4.2
[INFO] [stderr]    Compiling happenstance-testkit v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `release` profile [optimized] target(s) in 11.08s
[INFO] running `Command { std: "docker" "inspect" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v3.0.3
[INFO] [stderr]    Compiling thiserror-impl v2.0.19
[INFO] [stderr]    Compiling tokio-macros v2.7.2
[INFO] [stderr]    Compiling tokio v1.53.1
[INFO] [stderr]    Compiling thiserror v2.0.19
[INFO] [stderr]    Compiling happenstance-core v0.4.2
[INFO] [stderr]    Compiling happenstance-testkit v0.4.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `happenstance-testkit` (test "mutation_coverage")
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/1.99.0-beta.8-x86_64-unknown-linux-gnu/bin/rustc --crate-name mutation_coverage --edition=2024 tests/mutation_coverage.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --emit=dep-info,link -C opt-level=3 -C embed-bitcode=no '--warn=clippy::pedantic' '--deny=clippy::unwrap_used' --warn=unused_qualifications --forbid=unsafe_code --warn=unreachable_pub --warn=unexpected_cfgs '--deny=clippy::todo' '--warn=rustdoc::private_intra_doc_links' '--allow=clippy::must_use_candidate' '--allow=clippy::module_name_repetitions' '--warn=clippy::missing_panics_doc' '--warn=clippy::missing_errors_doc' --warn=missing_docs --warn=missing_debug_implementations '--deny=rustdoc::broken_intra_doc_links' --check-cfg 'cfg(happenstance_naive_arm)' --test --cfg 'feature="default"' --cfg 'feature="memory"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("bench", "default", "memory", "proptest"))' -C metadata=aa40ccbcff76b296 -C extra-filename=-e24604a549876463 --out-dir /opt/rustwide/target/release/deps -C strip=debuginfo -L dependency=/opt/rustwide/target/release/deps --extern futures_core=/opt/rustwide/target/release/deps/libfutures_core-6244fc04f4e913eb.rlib --extern happenstance_core=/opt/rustwide/target/release/deps/libhappenstance_core-b1803818a1aabc4f.rlib --extern happenstance_testkit=/opt/rustwide/target/release/deps/libhappenstance_testkit-574d38f4800da7ec.rlib --extern tokio=/opt/rustwide/target/release/deps/libtokio-0ad2743a43d100c4.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" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848", kill_on_drop: false }`
[INFO] [stdout] 92479bbb1dcc94421fd6cff8050155692e28190d557a866d10c70511e9121848
