[INFO] fetching crate rpuc 0.3.0...
[INFO] testing rpuc-0.3.0 against beta-2025-10-28 for beta-1.92-2
[INFO] extracting crate rpuc 0.3.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate rpuc 0.3.0
[INFO] finished tweaking crates.io crate rpuc 0.3.0
[INFO] tweaked toml for crates.io crate rpuc 0.3.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rpuc 0.3.0 on toolchain beta-2025-10-28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rpuc 0.3.0 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-2025-10-28" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8f3260ca5ca24f7f3f60f5851121d962b13950cccdeab6f521d520dfaf3f140
[INFO] running `Command { std: "docker" "start" "-a" "f8f3260ca5ca24f7f3f60f5851121d962b13950cccdeab6f521d520dfaf3f140", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8f3260ca5ca24f7f3f60f5851121d962b13950cccdeab6f521d520dfaf3f140", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8f3260ca5ca24f7f3f60f5851121d962b13950cccdeab6f521d520dfaf3f140", kill_on_drop: false }`
[INFO] [stdout] f8f3260ca5ca24f7f3f60f5851121d962b13950cccdeab6f521d520dfaf3f140
[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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2025-10-28" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 005329d7a5bbf0202307ff7a4e9438ed14a8a9079449336a05a7d0d0f249168d
[INFO] running `Command { std: "docker" "start" "-a" "005329d7a5bbf0202307ff7a4e9438ed14a8a9079449336a05a7d0d0f249168d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.81
[INFO] [stderr]    Compiling autocfg v1.2.0
[INFO] [stderr]    Compiling libc v0.2.154
[INFO] [stderr]    Compiling serde v1.0.198
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling once_cell v1.19.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.19
[INFO] [stderr]    Compiling hashbrown v0.14.3
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling memchr v2.7.2
[INFO] [stderr]    Compiling thiserror v1.0.59
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling anyhow v1.0.82
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling smallvec v1.13.2
[INFO] [stderr]    Compiling miniz_oxide v0.7.2
[INFO] [stderr]    Compiling crc32fast v1.4.0
[INFO] [stderr]    Compiling tinyvec v1.6.0
[INFO] [stderr]    Compiling bitflags v2.5.0
[INFO] [stderr]    Compiling scopeguard v1.2.0
[INFO] [stderr]    Compiling rustix v0.38.34
[INFO] [stderr]    Compiling utf8parse v0.2.1
[INFO] [stderr]    Compiling semver v1.0.22
[INFO] [stderr]    Compiling log v0.4.21
[INFO] [stderr]    Compiling unicode-bidi v0.3.15
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling lock_api v0.4.11
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling serde_json v1.0.117
[INFO] [stderr]    Compiling percent-encoding v2.3.1
[INFO] [stderr]    Compiling linux-raw-sys v0.4.13
[INFO] [stderr]    Compiling ryu v1.0.18
[INFO] [stderr]    Compiling itoa v1.0.11
[INFO] [stderr]    Compiling flate2 v1.0.29
[INFO] [stderr]    Compiling anstyle-parse v0.2.3
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling form_urlencoded v1.2.1
[INFO] [stderr]    Compiling anstyle-query v1.0.2
[INFO] [stderr]    Compiling winnow v0.6.7
[INFO] [stderr]    Compiling target-lexicon v0.12.14
[INFO] [stderr]    Compiling anstyle v1.0.6
[INFO] [stderr]    Compiling quote v1.0.36
[INFO] [stderr]    Compiling colorchoice v1.0.0
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]    Compiling schemars v0.8.19
[INFO] [stderr]    Compiling bytecheck v0.6.12
[INFO] [stderr]    Compiling anstream v0.6.13
[INFO] [stderr]    Compiling syn v2.0.60
[INFO] [stderr]    Compiling getrandom v0.2.15
[INFO] [stderr]    Compiling unicode-normalization v0.1.23
[INFO] [stderr]    Compiling crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling cranelift-isle v0.91.1
[INFO] [stderr]    Compiling clap_lex v0.6.0
[INFO] [stderr]    Compiling half v1.8.3
[INFO] [stderr]    Compiling dyn-clone v1.0.17
[INFO] [stderr]    Compiling simdutf8 v0.1.4
[INFO] [stderr]    Compiling unsafe-libyaml v0.2.11
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling rend v0.4.2
[INFO] [stderr]    Compiling either v1.11.0
[INFO] [stderr]    Compiling idna v0.5.0
[INFO] [stderr]    Compiling clap_builder v4.4.11
[INFO] [stderr]    Compiling hashbrown v0.12.3
[INFO] [stderr]    Compiling filetime v0.2.23
[INFO] [stderr]    Compiling memmap2 v0.6.2
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling litrs v0.4.1
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.91.1
[INFO] [stderr]    Compiling rkyv v0.7.44
[INFO] [stderr]    Compiling fastrand v2.1.0
[INFO] [stderr]    Compiling cc v1.0.95
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling cpufeatures v0.2.12
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.91.1
[INFO] [stderr]    Compiling rayon v1.10.0
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]    Compiling fxhash v0.2.1
[INFO] [stderr]    Compiling document-features v0.2.8
[INFO] [stderr]    Compiling num-rational v0.4.1
[INFO] [stderr]    Compiling corosensei v0.1.4
[INFO] [stderr]    Compiling sha2 v0.10.8
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]    Compiling leb128 v0.2.5
[INFO] [stderr]    Compiling seahash v4.1.0
[INFO] [stderr]    Compiling gimli v0.28.1
[INFO] [stderr]    Compiling cranelift-entity v0.91.1
[INFO] [stderr]    Compiling parking_lot_core v0.9.9
[INFO] [stderr]    Compiling object v0.32.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling more-asserts v0.2.2
[INFO] [stderr]    Compiling slice-group-by v0.3.1
[INFO] [stderr]    Compiling fallible-iterator v0.2.0
[INFO] [stderr]    Compiling xxhash-rust v0.8.10
[INFO] [stderr]    Compiling rustc-demangle v0.1.23
[INFO] [stderr]    Compiling built v0.7.2
[INFO] [stderr]    Compiling aligned-vec v0.5.0
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]    Compiling xattr v1.3.1
[INFO] [stderr]    Compiling tempfile v3.10.1
[INFO] [stderr]    Compiling v_frame v0.3.8
[INFO] [stderr]    Compiling backtrace v0.3.71
[INFO] [stderr]    Compiling rav1e v0.7.1
[INFO] [stderr]    Compiling tar v0.4.40
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling regalloc2 v0.5.1
[INFO] [stderr]    Compiling dashmap v5.5.3
[INFO] [stderr]    Compiling cranelift-bforest v0.91.1
[INFO] [stderr]    Compiling addr2line v0.21.0
[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-2025-10-28-x86_64-unknown-linux-gnu/bin/rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-1.0.109/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="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' --cfg 'feature="visit"' --check-cfg 'cfg(docsrs,test)' --check-cfg 'cfg(feature, values("clone-impls", "default", "derive", "extra-traits", "fold", "full", "parsing", "printing", "proc-macro", "quote", "test", "visit", "visit-mut"))' -C metadata=fd3bb18bed01ba86 -C extra-filename=-38eb537217fbde4b --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-16aa65c269b94be1.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a36e532aafe25f76.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-772f13ecc3fc189a.rmeta --cap-lints allow --cap-lints=warn --cfg syn_disable_nightly_tests` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "005329d7a5bbf0202307ff7a4e9438ed14a8a9079449336a05a7d0d0f249168d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "005329d7a5bbf0202307ff7a4e9438ed14a8a9079449336a05a7d0d0f249168d", kill_on_drop: false }`
[INFO] [stdout] 005329d7a5bbf0202307ff7a4e9438ed14a8a9079449336a05a7d0d0f249168d