[INFO] fetching crate mdoc 0.3.0...
[INFO] checking mdoc-0.3.0 against master#fe7294f8793d001bc3f9d197e7cdef6cdb46c15a for pr-153912
[INFO] extracting crate mdoc 0.3.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate mdoc 0.3.0
[INFO] finished tweaking crates.io crate mdoc 0.3.0
[INFO] tweaked toml for crates.io crate mdoc 0.3.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate mdoc 0.3.0 on toolchain fe7294f8793d001bc3f9d197e7cdef6cdb46c15a
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fe7294f8793d001bc3f9d197e7cdef6cdb46c15a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate mdoc 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" "+fe7294f8793d001bc3f9d197e7cdef6cdb46c15a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+fe7294f8793d001bc3f9d197e7cdef6cdb46c15a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 34be6effb0eddfaf31d924df269848a1bfa67be7d05dac89c862512e8db86cae
[INFO] running `Command { std: "docker" "start" "-a" "34be6effb0eddfaf31d924df269848a1bfa67be7d05dac89c862512e8db86cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "34be6effb0eddfaf31d924df269848a1bfa67be7d05dac89c862512e8db86cae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "34be6effb0eddfaf31d924df269848a1bfa67be7d05dac89c862512e8db86cae", kill_on_drop: false }`
[INFO] [stdout] 34be6effb0eddfaf31d924df269848a1bfa67be7d05dac89c862512e8db86cae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+fe7294f8793d001bc3f9d197e7cdef6cdb46c15a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 22e74b91d6f5dd1740c0dea632f45001bf1b4ac2ae895539ba147516a07207fb
[INFO] running `Command { std: "docker" "start" "-a" "22e74b91d6f5dd1740c0dea632f45001bf1b4ac2ae895539ba147516a07207fb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.107
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[INFO] [stderr]     Checking tectonic_xdv v0.1.12
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking webpki v0.22.0
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking quick-xml v0.22.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking chunked_transfer v1.4.0
[INFO] [stderr]    Compiling darling_core v0.12.4
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking webpki-roots v0.22.1
[INFO] [stderr]     Checking rustls v0.20.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking dirs v4.0.0
[INFO] [stderr]     Checking tokio-util v0.6.9
[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/fe7294f8793d001bc3f9d197e7cdef6cdb46c15a/bin/rustc --crate-name syn --edition=2018 /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/syn-1.0.81/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"' --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=a66256a04fe557e4 -C extra-filename=-6a3f2bd2d121bac2 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-0de97459156598c1.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-ba004dbc476a164f.rmeta --extern unicode_xid=/opt/rustwide/target/debug/deps/libunicode_xid-9a308e948d49b175.rmeta --cap-lints allow --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "22e74b91d6f5dd1740c0dea632f45001bf1b4ac2ae895539ba147516a07207fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22e74b91d6f5dd1740c0dea632f45001bf1b4ac2ae895539ba147516a07207fb", kill_on_drop: false }`
[INFO] [stdout] 22e74b91d6f5dd1740c0dea632f45001bf1b4ac2ae895539ba147516a07207fb