[INFO] fetching crate servo-webxr-api 0.1.0...
[INFO] testing servo-webxr-api-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate servo-webxr-api 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate servo-webxr-api 0.1.0
[INFO] finished tweaking crates.io crate servo-webxr-api 0.1.0
[INFO] tweaked toml for crates.io crate servo-webxr-api 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate servo-webxr-api 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 servo-webxr-api 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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] f5d6597f4ac99424b46508c758c5ce58b12efb3ea9ab2313568eb2594a58522a
[INFO] running `Command { std: "docker" "start" "-a" "f5d6597f4ac99424b46508c758c5ce58b12efb3ea9ab2313568eb2594a58522a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5d6597f4ac99424b46508c758c5ce58b12efb3ea9ab2313568eb2594a58522a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5d6597f4ac99424b46508c758c5ce58b12efb3ea9ab2313568eb2594a58522a", kill_on_drop: false }`
[INFO] [stdout] f5d6597f4ac99424b46508c758c5ce58b12efb3ea9ab2313568eb2594a58522a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 3825d75b558db119e1349ed7c38b3127988c4c8b504b0b1f80a6763815303e53
[INFO] running `Command { std: "docker" "start" "-a" "3825d75b558db119e1349ed7c38b3127988c4c8b504b0b1f80a6763815303e53", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling siphasher v1.0.2
[INFO] [stderr]    Compiling stable_deref_trait v1.2.1
[INFO] [stderr]    Compiling fastrand v2.3.0
[INFO] [stderr]    Compiling litemap v0.7.5
[INFO] [stderr]    Compiling cc v1.2.58
[INFO] [stderr]    Compiling icu_locid_transform_data v1.5.1
[INFO] [stderr]    Compiling icu_properties_data v1.5.1
[INFO] [stderr]    Compiling icu_normalizer_data v1.5.1
[INFO] [stderr]    Compiling mio v1.2.0
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling socket2 v0.6.1
[INFO] [stderr]    Compiling core_maths v0.1.1
[INFO] [stderr]    Compiling bytemuck v1.25.0
[INFO] [stderr]    Compiling dtoa v1.0.11
[INFO] [stderr]    Compiling rayon v1.11.0
[INFO] [stderr]    Compiling phf_shared v0.13.1
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling khronos_api v3.1.0
[INFO] [stderr]    Compiling smallbitvec v2.6.0
[INFO] [stderr]    Compiling thin-vec v0.2.14
[INFO] [stderr]    Compiling dtoa-short v0.3.5
[INFO] [stderr]    Compiling time-core v0.1.7
[INFO] [stderr]    Compiling indexmap v2.11.4
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling slotmap v1.1.1
[INFO] [stderr]    Compiling float-cmp v0.9.0
[INFO] [stderr]    Compiling time-macros v0.2.25
[INFO] [stderr]    Compiling num_threads v0.1.7
[INFO] [stderr]    Compiling phf_generator v0.13.1
[INFO] [stderr]    Compiling icu_segmenter_data v1.5.1
[INFO] [stderr]    Compiling xml-rs v0.8.28
[INFO] [stderr]    Compiling getrandom v0.4.1
[INFO] [stderr]    Compiling tokio v1.50.0
[INFO] [stderr]    Compiling walkdir v2.5.0
[INFO] [stderr]    Compiling phf_codegen v0.13.1
[INFO] [stderr]    Compiling string_cache_codegen v0.6.1
[INFO] [stderr]    Compiling strict-num v0.1.1
[INFO] [stderr]    Compiling ttf-parser v0.25.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.15
[INFO] [stderr]    Compiling getrandom v0.3.4
[INFO] [stderr]    Compiling selectors v0.36.1
[INFO] [stderr]    Compiling bitflags v2.11.0
[INFO] [stderr]    Compiling rustix v1.1.2
[INFO] [stderr]    Compiling object v0.37.3
[INFO] [stderr]    Compiling quick-error v2.0.1
[INFO] [stderr]    Compiling arrayref v0.3.9
[INFO] [stderr]    Compiling roxmltree v0.20.0
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling regex-automata v0.4.13
[INFO] [stderr]    Compiling tiny-skia-path v0.11.4
[INFO] [stderr]    Compiling stylo v0.15.0
[INFO] [stderr]    Compiling stylo_atoms v0.15.0
[INFO] [stderr]    Compiling web_atoms v0.2.3
[INFO] [stderr]    Compiling webrender_build v0.68.0
[INFO] [stderr]    Compiling build-parallel v0.1.2
[INFO] [stderr]    Compiling gl_generator v0.14.0
[INFO] [stderr]    Compiling rgb v0.8.53
[INFO] [stderr]    Compiling freetype-sys v0.20.1
[INFO] [stderr]    Compiling glslopt v0.1.12
[INFO] [stderr]    Compiling tikv-jemalloc-sys v0.6.1+5.3.0-1-ge13ca993e8ccb9ba9847cc330696e02839f328f7
[INFO] [stderr]    Compiling fontconfig-parser v0.5.8
[INFO] [stderr]    Compiling zeitstempel v0.1.2
[INFO] [stderr]    Compiling byteorder-lite v0.1.0
[INFO] [stderr]    Compiling unic-common v0.9.0
[INFO] [stderr]    Compiling gleam v0.15.1
[INFO] [stderr]    Compiling unicode-script v0.5.8
[INFO] [stderr]    Compiling unicode-ccc v0.4.0
[INFO] [stderr]    Compiling unicode-bidi-mirroring v0.4.0
[INFO] [stderr]    Compiling zune-core v0.4.12
[INFO] [stderr]    Compiling unic-char-range v0.9.0
[INFO] [stderr]    Compiling gimli v0.32.3
[INFO] [stderr]    Compiling unicode-properties v0.1.4
[INFO] [stderr]    Compiling image-webp v0.2.4
[INFO] [stderr]    Compiling unic-char-property v0.9.0
[INFO] [stderr]    Compiling zune-jpeg v0.4.21
[INFO] [stderr]    Compiling unic-ucd-version v0.9.0
[INFO] [stderr]    Compiling freetype v0.7.2
[INFO] [stderr]    Compiling simplecss v0.2.2
[INFO] [stderr]    Compiling pico-args v0.5.0
[INFO] [stderr]    Compiling xmlwriter v0.1.0
[INFO] [stderr]    Compiling unicode-vo v0.1.0
[INFO] [stderr]    Compiling imagesize v0.13.0
[INFO] [stderr]    Compiling data-url v0.3.2
[INFO] [stderr]    Compiling stylo_static_prefs v0.15.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.27
[INFO] [stderr]    Compiling unicode-bidi v0.3.18
[INFO] [stderr]    Compiling svg_fmt v0.4.5
[INFO] [stderr]    Compiling fontdb v0.23.0
[INFO] [stderr]    Compiling tracy-rs v0.1.2
[INFO] [stderr]    Compiling unic-ucd-ident v0.9.0
[INFO] [stderr]    Compiling deranged v0.5.8
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]    Compiling uuid v1.23.0
[INFO] [stderr]    Compiling tiny-skia v0.11.4
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling uluru v3.1.0
[INFO] [stderr]    Compiling topological-sort v0.1.0
[INFO] [stderr]    Compiling addr2line v0.25.1
[INFO] [stderr]    Compiling atomic_refcell v0.1.13
[INFO] [stderr]    Compiling unicode-segmentation v1.13.2
[INFO] [stderr]    Compiling grid v1.0.0
[INFO] [stderr]    Compiling serde_json v1.0.149
[INFO] [stderr]    Compiling taffy v0.10.0
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]    Compiling built v0.7.7
[INFO] [stderr]    Compiling nom v8.0.0
[INFO] [stderr] error: could not compile `syn` (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 syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.117/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 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="fold"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="visit"' --cfg 'feature="visit-mut"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "test", "visit", "visit-mut"))' -C metadata=f4c02948d5809259 -C extra-filename=-aeba75ddfd93a6bc --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-af63080cb3c4e46a.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-866706526c1a0fdf.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-499e208ff65c691c.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" "3825d75b558db119e1349ed7c38b3127988c4c8b504b0b1f80a6763815303e53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3825d75b558db119e1349ed7c38b3127988c4c8b504b0b1f80a6763815303e53", kill_on_drop: false }`
[INFO] [stdout] 3825d75b558db119e1349ed7c38b3127988c4c8b504b0b1f80a6763815303e53
