[INFO] fetching crate syntaxdot 0.3.1...
[INFO] checking syntaxdot-0.3.1 against try#6f8a6450478f69b8510c8976ab6c2a70b3b0e47c for pr-84920
[INFO] extracting crate syntaxdot 0.3.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate syntaxdot 0.3.1 on toolchain 6f8a6450478f69b8510c8976ab6c2a70b3b0e47c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syntaxdot 0.3.1
[INFO] finished tweaking crates.io crate syntaxdot 0.3.1
[INFO] tweaked toml for crates.io crate syntaxdot 0.3.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae37ea2e6d491a5ce1f75b0452f7556aea74f8fc8eba6a30bd4e7114d403f3d0
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ae37ea2e6d491a5ce1f75b0452f7556aea74f8fc8eba6a30bd4e7114d403f3d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae37ea2e6d491a5ce1f75b0452f7556aea74f8fc8eba6a30bd4e7114d403f3d0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae37ea2e6d491a5ce1f75b0452f7556aea74f8fc8eba6a30bd4e7114d403f3d0", kill_on_drop: false }`
[INFO] [stdout] ae37ea2e6d491a5ce1f75b0452f7556aea74f8fc8eba6a30bd4e7114d403f3d0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+6f8a6450478f69b8510c8976ab6c2a70b3b0e47c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a3a7ec380ae998d09502af7fc5fc25d0a49c2f51e026bfbec9e2816d869bddef
[INFO] running `Command { std: "docker" "start" "-a" "a3a7ec380ae998d09502af7fc5fc25d0a49c2f51e026bfbec9e2816d869bddef", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.125
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling fst v0.4.5
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking seqalign v0.2.2
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling curl-sys v0.4.42+curl-7.76.0
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]    Compiling libc v0.2.94
[INFO] [stderr]    Compiling crc32fast v1.2.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking log v0.4.14
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking petgraph v0.5.1
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling num-derive v0.3.3
[INFO] [stderr]     Checking flate2 v1.0.20
[INFO] [stderr]    Compiling sentencepiece-sys v0.6.0
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling openssl-sys v0.9.63
[INFO] [stderr]    Compiling time v0.1.44
[INFO] [stderr]    Compiling socket2 v0.4.0
[INFO] [stderr]    Compiling prost-derive v0.6.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking ordered-float v2.2.0
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking udgraph v0.6.0
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]     Checking ndarray v0.14.0
[INFO] [stderr]     Checking thiserror v1.0.24
[INFO] [stderr]     Checking zip v0.5.12
[INFO] [stderr]     Checking wordpieces v0.4.1
[INFO] [stderr]     Checking conllu v0.6.0
[INFO] [stderr] error: could not compile `serde_derive`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name serde_derive /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/serde_derive-1.0.125/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' -C metadata=bef19e880331b4ec -C extra-filename=-bef19e880331b4ec --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-7b8784b2c4431615.rlib --extern quote=/opt/rustwide/target/debug/deps/libquote-299e6c8123e25dcd.rlib --extern syn=/opt/rustwide/target/debug/deps/libsyn-dadea4fd75790370.rlib --extern proc_macro --cap-lints allow --cap-lints=forbid --cfg underscore_consts` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "a3a7ec380ae998d09502af7fc5fc25d0a49c2f51e026bfbec9e2816d869bddef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3a7ec380ae998d09502af7fc5fc25d0a49c2f51e026bfbec9e2816d869bddef", kill_on_drop: false }`
[INFO] [stdout] a3a7ec380ae998d09502af7fc5fc25d0a49c2f51e026bfbec9e2816d869bddef