[INFO] cloning repository https://github.com/paritytech/polkadot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paritytech/polkadot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparitytech%2Fpolkadot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparitytech%2Fpolkadot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8475048a65982a29b3d7fa3935a5897abb3cd6c3
[INFO] checking paritytech/polkadot against master#c5fbcd35a8217a17f6b63a22217ace06cf8f5f02 for pr-86194
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparitytech%2Fpolkadot" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paritytech/polkadot on toolchain c5fbcd35a8217a17f6b63a22217ace06cf8f5f02
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/paritytech/polkadot
[INFO] finished tweaking git repo https://github.com/paritytech/polkadot
[INFO] tweaked toml for git repo https://github.com/paritytech/polkadot written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/paritytech/polkadot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c39c344899ee43eb0ffbdaaaf3289c1f3c268e576f5aca02d8cf48f337c8f83
[INFO] running `Command { std: "docker" "start" "-a" "5c39c344899ee43eb0ffbdaaaf3289c1f3c268e576f5aca02d8cf48f337c8f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c39c344899ee43eb0ffbdaaaf3289c1f3c268e576f5aca02d8cf48f337c8f83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c39c344899ee43eb0ffbdaaaf3289c1f3c268e576f5aca02d8cf48f337c8f83", kill_on_drop: false }`
[INFO] [stdout] 5c39c344899ee43eb0ffbdaaaf3289c1f3c268e576f5aca02d8cf48f337c8f83
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+c5fbcd35a8217a17f6b63a22217ace06cf8f5f02" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bca8bd6db73710722a586462668f0b1149884bc74f7c723c601d8c39c9a7c3a4
[INFO] running `Command { std: "docker" "start" "-a" "bca8bd6db73710722a586462668f0b1149884bc74f7c723c601d8c39c9a7c3a4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling syn v1.0.67
[INFO] [stderr]    Compiling libc v0.2.91
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling getrandom v0.2.1
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]     Checking ppv-lite86 v0.2.8
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking subtle v2.2.3
[INFO] [stderr]     Checking either v1.6.0
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]     Checking ahash v0.4.6
[INFO] [stderr]     Checking cpuid-bool v0.1.0
[INFO] [stderr]    Compiling radium v0.6.2
[INFO] [stderr]     Checking signature v1.1.0
[INFO] [stderr]     Checking tap v1.0.0
[INFO] [stderr]     Checking byte-slice-cast v1.0.0
[INFO] [stderr]     Checking arrayvec v0.7.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling instant v0.1.6
[INFO] [stderr]     Checking rustc-hash v1.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.21
[INFO] [stderr]    Compiling fs_extra v1.1.0
[INFO] [stderr]     Checking adler v0.2.2
[INFO] [stderr]    Compiling parity-util-mem v0.9.0
[INFO] [stderr]     Checking sp-std v3.0.0 (https://github.com/paritytech/substrate?branch=master#34d4bb0e)
[INFO] [stderr]     Checking parity-wasm v0.42.2
[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking downcast-rs v1.2.0
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]     Checking environmental v1.1.3
[INFO] [stderr]     Checking dyn-clone v1.0.2
[INFO] [stderr]     Checking object v0.23.0
[INFO] [stderr]    Compiling zstd-safe v3.0.1+zstd.1.4.9
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.23
[INFO] [stderr]     Checking unsigned-varint v0.5.1
[INFO] [stderr]     Checking bs58 v0.4.0
[INFO] [stderr]     Checking asn1_der v0.7.4
[INFO] [stderr]     Checking base64 v0.13.0
[INFO] [stderr]     Checking vec-arena v1.0.0
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.73
[INFO] [stderr]    Compiling bumpalo v3.4.0
[INFO] [stderr]     Checking httpdate v0.3.2
[INFO] [stderr]    Compiling wasm-bindgen v0.2.73
[INFO] [stderr]    Compiling prometheus v0.11.0
[INFO] [stderr]     Checking hex_fmt v0.3.0
[INFO] [stderr]    Compiling target-lexicon v0.12.0
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking wasmparser v0.78.2
[INFO] [stderr]    Compiling rayon-core v1.7.1
[INFO] [stderr]    Compiling wasmtime-cache v0.27.0
[INFO] [stderr]     Checking scoped-tls v1.0.0
[INFO] [stderr]    Compiling hex-literal v0.3.1
[INFO] [stderr]    Compiling data-encoding v2.3.2
[INFO] [stderr]     Checking base-x v0.2.8
[INFO] [stderr]     Checking integer-encoding v1.1.5
[INFO] [stderr]    Compiling assert_matches v1.5.0
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]    Compiling winapi v0.3.9
[INFO] [stderr]    Compiling cfg_aliases v0.1.1
[INFO] [stderr]     Checking mio-named-pipes v0.1.7
[INFO] [stderr]    Compiling bindgen v0.57.0
[INFO] [stderr]    Compiling sc-consensus-slots v0.9.0 (https://github.com/paritytech/substrate?branch=master#34d4bb0e)
[INFO] [stderr]     Checking retain_mut v0.1.3
[INFO] [stderr]    Compiling fs-err v2.5.0
[INFO] [stderr]     Checking always-assert v0.1.2
[INFO] [stderr]    Compiling maplit v1.0.2
[INFO] [stderr]    Compiling platforms v1.1.0
[INFO] [stderr]    Compiling dlmalloc v0.2.1
[INFO] [stderr]    Compiling eyre v0.6.2
[INFO] [stderr]     Checking indenter v0.3.0
[INFO] [stderr]     Checking owo-colors v1.2.1
[INFO] [stderr]    Compiling trybuild v1.0.42
[INFO] [stderr]     Checking diff v0.1.12
[INFO] [stderr]     Checking separator v0.4.1
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling indexmap v1.6.1
[INFO] [stderr]    Compiling crossbeam-utils v0.8.1
[INFO] [stderr]    Compiling atomic v0.5.0
[INFO] [stderr]    Compiling memoffset v0.5.5
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling rayon v1.3.1
[INFO] [stderr]     Checking ckb-merkle-mountain-range v0.3.1
[INFO] [stderr]    Compiling tokio v1.6.1
[INFO] [stderr]     Checking lock_api v0.4.1
[INFO] [stderr]    Compiling generic-array v0.14.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling nom v5.1.2
[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-0.6.21/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -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=5476c750da7ba7f3 -C extra-filename=-5476c750da7ba7f3 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=forbid` (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" "bca8bd6db73710722a586462668f0b1149884bc74f7c723c601d8c39c9a7c3a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bca8bd6db73710722a586462668f0b1149884bc74f7c723c601d8c39c9a7c3a4", kill_on_drop: false }`
[INFO] [stdout] bca8bd6db73710722a586462668f0b1149884bc74f7c723c601d8c39c9a7c3a4