[INFO] fetching crate polyc-host 2026.10.5...
[INFO] checking polyc-host-2026.10.5 against f3df2feb79b2422c028f78855ec6ffe2e212d7cc for pr-163699
[INFO] extracting crate polyc-host 2026.10.5 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate polyc-host 2026.10.5
[INFO] finished tweaking crates.io crate polyc-host 2026.10.5
[INFO] tweaked toml for crates.io crate polyc-host 2026.10.5 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate polyc-host 2026.10.5 on toolchain f3df2feb79b2422c028f78855ec6ffe2e212d7cc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f3df2feb79b2422c028f78855ec6ffe2e212d7cc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate polyc-host 2026.10.5 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" "+f3df2feb79b2422c028f78855ec6ffe2e212d7cc" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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] f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075
[INFO] running `Command { std: "docker" "start" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075", 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" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075" "/opt/rustwide/cargo-home/bin/cargo" "+f3df2feb79b2422c028f78855ec6ffe2e212d7cc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075", 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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075" "/opt/rustwide/cargo-home/bin/cargo" "+f3df2feb79b2422c028f78855ec6ffe2e212d7cc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.119
[INFO] [stderr]    Compiling syn v3.0.3
[INFO] [stderr]     Checking memchr v2.8.1
[INFO] [stderr]     Checking subtle v2.6.1
[INFO] [stderr]     Checking futures-channel v0.3.34
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]    Compiling zerocopy v0.8.50
[INFO] [stderr]    Compiling serde_core v1.0.229
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking errno v0.3.14
[INFO] [stderr]     Checking socket2 v0.6.4
[INFO] [stderr]     Checking mio v1.2.1
[INFO] [stderr]     Checking getrandom v0.4.3
[INFO] [stderr]    Compiling winnow v1.0.3
[INFO] [stderr]    Compiling indexmap v2.14.0
[INFO] [stderr]     Checking ctutils v0.4.2
[INFO] [stderr]     Checking getrandom v0.3.4
[INFO] [stderr]     Checking signal-hook-registry v1.4.8
[INFO] [stderr]     Checking writeable v0.6.3
[INFO] [stderr]    Compiling commonware-macros-impl v2026.9.0
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.20
[INFO] [stderr]    Compiling toml_writer v1.1.2+spec-1.1.0
[INFO] [stderr]     Checking ff v0.14.0
[INFO] [stderr]     Checking bitflags v2.12.1
[INFO] [stderr]    Compiling serde_json v1.0.151
[INFO] [stderr]     Checking rand_core v0.9.5
[INFO] [stderr]     Checking group v0.14.0
[INFO] [stderr]     Checking regex-syntax v0.8.11
[INFO] [stderr]    Compiling ahash v0.8.12
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]    Compiling either v1.16.0
[INFO] [stderr]     Checking dashmap v6.2.1
[INFO] [stderr]     Checking const-hex v1.19.1
[INFO] [stderr]     Checking generic-array v0.14.7
[INFO] [stderr]    Compiling curve25519-dalek v5.0.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]     Checking chacha20 v0.10.0
[INFO] [stderr]     Checking num-bigint v0.4.8
[INFO] [stderr]     Checking rand v0.10.2
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]     Checking hashbrown v0.17.1
[INFO] [stderr]     Checking rayon-core v1.13.0
[INFO] [stderr]     Checking num_cpus v1.17.0
[INFO] [stderr]     Checking plotters-backend v0.3.7
[INFO] [stderr]    Compiling aws-lc-rs v1.18.1
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]     Checking crypto-common v0.1.7
[INFO] [stderr]     Checking clap_builder v4.6.7
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking plotters-svg v0.3.7
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking raw-cpuid v11.6.0
[INFO] [stderr]     Checking rayon v1.12.0
[INFO] [stderr]     Checking regex-automata v0.4.16
[INFO] [stderr]     Checking itertools v0.13.0
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking constant_time_eq v0.4.2
[INFO] [stderr]    Compiling prometheus-client v0.25.1
[INFO] [stderr]     Checking cast v0.3.0
[INFO] [stderr]     Checking num-rational v0.4.2
[INFO] [stderr]    Compiling cc v1.2.63
[INFO] [stderr]     Checking spin v0.10.1
[INFO] [stderr]     Checking plotters v0.3.7
[INFO] [stderr]     Checking crc-fast v1.10.0
[INFO] [stderr]     Checking page_size v0.6.0
[INFO] [stderr]     Checking spinning_top v0.3.0
[INFO] [stderr]     Checking web-time v1.1.0
[INFO] [stderr]     Checking futures-timer v3.0.4
[INFO] [stderr]    Compiling toml_parser v1.1.2+spec-1.1.0
[INFO] [stderr]     Checking fixedbitset v0.5.7
[INFO] [stderr]     Checking nonzero_ext v0.3.0
[INFO] [stderr]     Checking oorandom v11.1.5
[INFO] [stderr]     Checking anes v0.1.6
[INFO] [stderr]     Checking dtoa v1.0.11
[INFO] [stderr]     Checking sysinfo v0.39.6
[INFO] [stderr]     Checking sha1_smol v1.0.1
[INFO] [stderr]     Checking uuid v1.26.1
[INFO] [stderr]     Checking clap v4.6.7
[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/f3df2feb79b2422c028f78855ec6ffe2e212d7cc/bin/rustc --crate-name syn --edition=2021 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-2.0.119/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat,unused-externs-silent --crate-type lib --emit=dep-info,metadata,link -Z embed-metadata=no -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=50046b1a72d3a7c3 -C extra-filename=-4effed4b3c1aa3f8 --out-dir /opt/rustwide/target/debug/build/syn/4effed4b3c1aa3f8/out -L dependency=/opt/rustwide/target/debug/build/proc-macro2/d4cb564e807a9cd7/out -L dependency=/opt/rustwide/target/debug/build/unicode-ident/8c98a1a0e58216a9/out --extern proc_macro2=/opt/rustwide/target/debug/build/proc-macro2/d4cb564e807a9cd7/out/libproc_macro2-d4cb564e807a9cd7.rmeta --extern quote=/opt/rustwide/target/debug/build/quote/aa2c5b8519914b46/out/libquote-aa2c5b8519914b46.rmeta --extern unicode_ident=/opt/rustwide/target/debug/build/unicode-ident/8c98a1a0e58216a9/out/libunicode_ident-8c98a1a0e58216a9.rmeta --cap-lints allow --cap-lints=forbid --force-warn=unused_crate_dependencies` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075", kill_on_drop: false }`
[INFO] [stdout] f94dfb274546a83c756e167948f7726d4629b159c45a92e3d1e6351724934075