[INFO] fetching crate mech 0.0.5...
[INFO] documenting mech-0.0.5 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate mech 0.0.5 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate mech 0.0.5 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mech 0.0.5
[INFO] finished tweaking crates.io crate mech 0.0.5
[INFO] tweaked toml for crates.io crate mech 0.0.5 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate crates.io crate mech 0.0.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] af858157adc6aae42257d41b7a2a470edfeceace16651453175270db147bbbe4
[INFO] running `Command { std: "docker" "start" "-a" "af858157adc6aae42257d41b7a2a470edfeceace16651453175270db147bbbe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "af858157adc6aae42257d41b7a2a470edfeceace16651453175270db147bbbe4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "af858157adc6aae42257d41b7a2a470edfeceace16651453175270db147bbbe4", kill_on_drop: false }`
[INFO] [stdout] af858157adc6aae42257d41b7a2a470edfeceace16651453175270db147bbbe4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6c782fb04894baa54b7ae7ec94190ae4f49a55417888a46f81c734cb6c20e6f0
[INFO] running `Command { std: "docker" "start" "-a" "6c782fb04894baa54b7ae7ec94190ae4f49a55417888a46f81c734cb6c20e6f0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
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[INFO] [stderr]     Checking either v1.5.3
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[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking arc-swap v0.4.6
[INFO] [stderr]    Compiling proc-macro-nested v0.1.4
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.15
[INFO] [stderr]     Checking pin-project-lite v0.1.4
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[INFO] [stderr]     Checking pin-utils v0.1.0
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[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]     Checking futures v0.1.29
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[INFO] [stderr]     Checking regex-syntax v0.6.17
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[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling encoding_rs v0.8.22
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[INFO] [stderr]     Checking base64 v0.11.0
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[INFO] [stderr]     Checking nodrop v0.1.14
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[INFO] [stderr]     Checking static_assertions v0.3.4
[INFO] [stderr]     Checking opaque-debug v0.2.3
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[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking ansi_term v0.11.0
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[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking block-padding v0.1.5
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling indexmap v1.3.2
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]     Checking bytestring v0.1.5
[INFO] [stderr]     Checking input_buffer v0.3.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking miniz_oxide v0.3.6
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking lru-cache v0.1.2
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr] error: could not compile `cc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name cc --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cc-1.0.52/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 -C debuginfo=2 -C metadata=a5ba3f8f4756149a -C extra-filename=-a5ba3f8f4756149a --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `regex-syntax`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name regex_syntax /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-syntax-0.6.17/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="unicode"' --cfg 'feature="unicode-age"' --cfg 'feature="unicode-bool"' --cfg 'feature="unicode-case"' --cfg 'feature="unicode-gencat"' --cfg 'feature="unicode-perl"' --cfg 'feature="unicode-script"' --cfg 'feature="unicode-segment"' -C metadata=68df5b48b17f2127 -C extra-filename=-68df5b48b17f2127 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not compile `proc-macro-hack`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name proc_macro_hack --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/proc-macro-hack-0.5.15/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type proc-macro --emit=dep-info,link -C prefer-dynamic -C embed-bitcode=no -C debuginfo=2 -C metadata=c79da6eefbcc6c5c -C extra-filename=-c79da6eefbcc6c5c --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern proc_macro --cap-lints allow` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "6c782fb04894baa54b7ae7ec94190ae4f49a55417888a46f81c734cb6c20e6f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c782fb04894baa54b7ae7ec94190ae4f49a55417888a46f81c734cb6c20e6f0", kill_on_drop: false }`
[INFO] [stdout] 6c782fb04894baa54b7ae7ec94190ae4f49a55417888a46f81c734cb6c20e6f0