[INFO] fetching crate kvbm-engine 1.4.0...
[INFO] documenting kvbm-engine-1.4.0 against 1.99.0-beta.1 for beta-rustdoc-1.99-1
[INFO] extracting crate kvbm-engine 1.4.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate kvbm-engine 1.4.0
[INFO] finished tweaking crates.io crate kvbm-engine 1.4.0
[INFO] tweaked toml for crates.io crate kvbm-engine 1.4.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate kvbm-engine 1.4.0 on toolchain 1.99.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate kvbm-engine 1.4.0 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" "+1.99.0-beta.1" "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@sha256:00c5645b54fe3ce5dae1417175e3c7fb6a6646c021d554ecd63a097b8b9f3602" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54
[INFO] running `Command { std: "docker" "start" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54", 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" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54", 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" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.1" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.117
[INFO] [stderr]    Compiling libc v0.2.186
[INFO] [stderr]     Checking memchr v2.8.1
[INFO] [stderr]     Checking log v0.4.30
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking deranged v0.5.8
[INFO] [stderr]    Compiling either v1.16.0
[INFO] [stderr]     Checking rustls-pki-types v1.14.1
[INFO] [stderr]    Compiling anyhow v1.0.102
[INFO] [stderr]    Compiling bitflags v2.11.1
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]    Compiling prettyplease v0.2.37
[INFO] [stderr]    Compiling regex-syntax v0.8.10
[INFO] [stderr]     Checking outref v0.5.2
[INFO] [stderr]    Compiling rustls v0.23.40
[INFO] [stderr]     Checking vsimd v0.8.0
[INFO] [stderr]     Checking sha2 v0.10.9
[INFO] [stderr]     Checking sync_wrapper v1.0.2
[INFO] [stderr]    Compiling itertools v0.14.0
[INFO] [stderr]    Compiling serde_json v1.0.150
[INFO] [stderr]     Checking fastrand v2.4.1
[INFO] [stderr]    Compiling zerocopy v0.8.50
[INFO] [stderr]    Compiling bytes v1.12.1
[INFO] [stderr]    Compiling rustix v1.1.4
[INFO] [stderr]     Checking base64-simd v0.8.0
[INFO] [stderr]    Compiling fixedbitset v0.5.7
[INFO] [stderr]     Checking der v0.6.1
[INFO] [stderr]    Compiling heck v0.4.1
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]    Compiling multimap v0.10.1
[INFO] [stderr]     Checking xxhash-rust v0.8.15
[INFO] [stderr]     Checking der v0.7.10
[INFO] [stderr]    Compiling petgraph v0.7.1
[INFO] [stderr]     Checking signature v2.2.0
[INFO] [stderr]    Compiling curve25519-dalek v4.1.3
[INFO] [stderr]    Compiling rustls v0.21.12
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking rmp v0.8.15
[INFO] [stderr]    Compiling glob v0.3.3
[INFO] [stderr]     Checking aho-corasick v1.1.4
[INFO] [stderr]    Compiling memoffset v0.9.1
[INFO] [stderr]     Checking spki v0.6.0
[INFO] [stderr]    Compiling prometheus v0.14.0
[INFO] [stderr]     Checking pkcs8 v0.9.0
[INFO] [stderr]     Checking base16ct v0.1.1
[INFO] [stderr]    Compiling clang-sys v1.8.1
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]     Checking ed25519 v2.2.3
[INFO] [stderr]    Compiling nix v0.31.3
[INFO] [stderr]    Compiling nix v0.30.1
[INFO] [stderr]     Checking sec1 v0.3.0
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]    Compiling portable-atomic v1.13.1
[INFO] [stderr]    Compiling minimal-lexical v0.2.1
[INFO] [stderr]     Checking rustls-native-certs v0.8.4
[INFO] [stderr]    Compiling regex-automata v0.4.14
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]     Checking time v0.3.47
[INFO] [stderr]     Checking spki v0.7.3
[INFO] [stderr]     Checking rustls-pemfile v2.2.0
[INFO] [stderr]    Compiling nom v7.1.3
[INFO] [stderr]    Compiling libloading v0.8.9
[INFO] [stderr]     Checking pkcs8 v0.10.2
[INFO] [stderr]     Checking serde_path_to_error v0.1.20
[INFO] [stderr]    Compiling bindgen v0.71.1
[INFO] [stderr]     Checking rustls-native-certs v0.7.3
[INFO] [stderr]     Checking flume v0.12.0
[INFO] [stderr]     Checking rustls-webpki v0.102.8
[INFO] [stderr]    Compiling itertools v0.13.0
[INFO] [stderr]    Compiling aws-types v1.3.12
[INFO] [stderr]     Checking parking_lot_core v0.9.12
[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking errno v0.3.14
[INFO] [stderr]     Checking mio v1.1.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.8
[INFO] [stderr]     Checking socket2 v0.6.4
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]     Checking getrandom v0.4.2
[INFO] [stderr]     Checking uuid v1.23.2
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]     Checking dashmap v6.2.1
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling tempfile v3.27.0
[INFO] [stderr]    Compiling rustc-hash v2.1.2
[INFO] [stderr]     Checking crypto-bigint v0.4.9
[INFO] [stderr]     Checking ff v0.12.1
[INFO] [stderr]     Checking signatory v0.27.1
[INFO] [stderr]    Compiling cc v1.2.63
[INFO] [stderr]     Checking group v0.12.1
[INFO] [stderr]     Checking signature v1.6.4
[INFO] [stderr]     Checking crypto-bigint v0.5.5
[INFO] [stderr]     Checking lru v0.12.5
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]     Checking elliptic-curve v0.12.3
[INFO] [stderr]     Checking rfc6979 v0.3.1
[INFO] [stderr]    Compiling cudarc v0.19.8
[INFO] [stderr]     Checking libloading v0.9.0
[INFO] [stderr]    Compiling proc-macro-error-attr2 v2.0.0
[INFO] [stderr]    Compiling yansi v1.0.1
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling regex v1.12.3
[INFO] [stderr]     Checking ecdsa v0.14.8
[INFO] [stderr]    Compiling uncased v0.9.10
[INFO] [stderr]     Checking crc-catalog v2.5.0
[INFO] [stderr]    Compiling dynamo-memory v1.4.0
[INFO] [stderr]     Checking xmlparser v0.13.6
[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/1.99.0-beta.1-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=cc64b5592db1569a -C extra-filename=-c3ddb4f2d88afdfd --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-154be7f81f34ed1b.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-a87dd5cb7e80719c.rmeta --extern unicode_ident=/opt/rustwide/target/debug/deps/libunicode_ident-86faa6b6bcc5b157.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" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54", kill_on_drop: false }`
[INFO] [stdout] f77f0fc66e1d5941556731dd4d374b56e087b0cc80f65d1e326bffc18e366d54
