[INFO] fetching crate csskit_highlight 0.0.21-canary.3b8c076166...
[INFO] testing csskit_highlight-0.0.21-canary.3b8c076166 against beta-2026-04-21 for beta-1.96-1
[INFO] extracting crate csskit_highlight 0.0.21-canary.3b8c076166 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate csskit_highlight 0.0.21-canary.3b8c076166
[INFO] finished tweaking crates.io crate csskit_highlight 0.0.21-canary.3b8c076166
[INFO] tweaked toml for crates.io crate csskit_highlight 0.0.21-canary.3b8c076166 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate csskit_highlight 0.0.21-canary.3b8c076166 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 csskit_highlight 0.0.21-canary.3b8c076166 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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a5d545a69733b83d6975b349df553b3843070e3ee99900753fbf1d18e6d38dab
[INFO] running `Command { std: "docker" "start" "-a" "a5d545a69733b83d6975b349df553b3843070e3ee99900753fbf1d18e6d38dab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a5d545a69733b83d6975b349df553b3843070e3ee99900753fbf1d18e6d38dab", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a5d545a69733b83d6975b349df553b3843070e3ee99900753fbf1d18e6d38dab", kill_on_drop: false }`
[INFO] [stdout] a5d545a69733b83d6975b349df553b3843070e3ee99900753fbf1d18e6d38dab
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] a8428e4554c83fc2621d18caa00f8f4143dcdfccc33dc486fe8a59634051da11
[INFO] running `Command { std: "docker" "start" "-a" "a8428e4554c83fc2621d18caa00f8f4143dcdfccc33dc486fe8a59634051da11", kill_on_drop: false }`
[INFO] [stderr]    Compiling either v1.15.0
[INFO] [stderr]    Compiling regex-syntax v0.8.6
[INFO] [stderr]    Compiling cfg-if v1.0.3
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling allocator-api2 v0.2.21
[INFO] [stderr]    Compiling log v0.4.28
[INFO] [stderr]    Compiling winnow v1.0.0
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.106
[INFO] [stderr]    Compiling aho-corasick v1.1.3
[INFO] [stderr]    Compiling grep-matcher v0.1.8
[INFO] [stderr]    Compiling toml_writer v1.0.7+spec-1.1.0
[INFO] [stderr]    Compiling smallvec v1.15.1
[INFO] [stderr]    Compiling chromashift v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling memmap2 v0.9.8
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling toml_parser v1.0.10+spec-1.1.0
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling quote v1.0.45
[INFO] [stderr]    Compiling bumpalo v3.19.1
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling encoding_rs_io v0.1.7
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling toml_datetime v1.0.1+spec-1.1.0
[INFO] [stderr]    Compiling serde_spanned v1.0.4
[INFO] [stderr]    Compiling toml v1.0.7+spec-1.1.0
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling derive_atom_set v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling bitmask-enum v2.2.5
[INFO] [stderr]    Compiling thiserror-impl v2.0.18
[INFO] [stderr]    Compiling miette-derive v7.6.0
[INFO] [stderr]    Compiling strum_macros v0.27.2
[INFO] [stderr]    Compiling csskit_derives v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling css_lexer v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling bstr v1.12.0
[INFO] [stderr]    Compiling miette v7.6.0
[INFO] [stderr]    Compiling css_parse v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling thiserror v2.0.18
[INFO] [stderr]    Compiling css_value_definition_parser v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling grep-searcher v0.1.16
[INFO] [stderr]    Compiling grep-regex v0.1.14
[INFO] [stderr]    Compiling csskit_proc_macro v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling strum v0.27.2
[INFO] [stderr]    Compiling csskit_source_finder v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling css_ast v0.0.21-canary.fc80f623b7
[INFO] [stderr]    Compiling csskit_highlight v0.0.21-canary.3b8c076166 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `css_ast` (lib)
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/rustup-home/toolchains/beta-2026-04-21-x86_64-unknown-linux-gnu/bin/rustc --crate-name css_ast --edition=2024 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/css_ast-0.0.21-canary.fc80f623b7/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="chromashift"' --cfg 'feature="default"' --cfg 'feature="visitable"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("_dhat-heap-testing", "chromashift", "css_feature_data", "default", "dynamic-atoms", "fancy", "miette", "serde", "visitable"))' -C metadata=7a659ca5a1853b54 -C extra-filename=-8ffea79eb5d7cee3 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bitmask_enum=/opt/rustwide/target/debug/deps/libbitmask_enum-2937dfa880207267.so --extern bumpalo=/opt/rustwide/target/debug/deps/libbumpalo-7c0176e6b9ad9c21.rmeta --extern chromashift=/opt/rustwide/target/debug/deps/libchromashift-178ba16219866236.rmeta --extern css_lexer=/opt/rustwide/target/debug/deps/libcss_lexer-94b45afa9a60fb28.rmeta --extern css_parse=/opt/rustwide/target/debug/deps/libcss_parse-7cb7369c04e84d4a.rmeta --extern csskit_derives=/opt/rustwide/target/debug/deps/libcsskit_derives-19091dc84e9c6ffe.so --extern csskit_proc_macro=/opt/rustwide/target/debug/deps/libcsskit_proc_macro-e7b910bc313e3904.so --extern derive_atom_set=/opt/rustwide/target/debug/deps/libderive_atom_set-f4875290aa28defe.so --extern miette=/opt/rustwide/target/debug/deps/libmiette-3991ad325e6f4654.rmeta --extern smallvec=/opt/rustwide/target/debug/deps/libsmallvec-f1edee636e9ac88b.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-8b907499567a7f78.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "a8428e4554c83fc2621d18caa00f8f4143dcdfccc33dc486fe8a59634051da11", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8428e4554c83fc2621d18caa00f8f4143dcdfccc33dc486fe8a59634051da11", kill_on_drop: false }`
[INFO] [stdout] a8428e4554c83fc2621d18caa00f8f4143dcdfccc33dc486fe8a59634051da11