[INFO] cloning repository https://github.com/flatcar-linux/fero
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/flatcar-linux/fero" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflatcar-linux%2Ffero", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflatcar-linux%2Ffero'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d69131ee1016933cb6681beade227a4aa53a282e
[INFO] checking flatcar-linux/fero against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflatcar-linux%2Ffero" "/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/flatcar-linux/fero on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/flatcar-linux/fero
[INFO] finished tweaking git repo https://github.com/flatcar-linux/fero
[INFO] tweaked toml for git repo https://github.com/flatcar-linux/fero written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/flatcar-linux/fero already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 63f69a1e7267983be1f106dd52eb6cec2e07c7506f1b056f17a473261568bdaf
[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" "63f69a1e7267983be1f106dd52eb6cec2e07c7506f1b056f17a473261568bdaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "63f69a1e7267983be1f106dd52eb6cec2e07c7506f1b056f17a473261568bdaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63f69a1e7267983be1f106dd52eb6cec2e07c7506f1b056f17a473261568bdaf", kill_on_drop: false }`
[INFO] [stdout] 63f69a1e7267983be1f106dd52eb6cec2e07c7506f1b056f17a473261568bdaf
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 62348fb232994df81538031a2ae67c121ebab1ef146d4d9fec315414a5c28f2c
[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" "62348fb232994df81538031a2ae67c121ebab1ef146d4d9fec315414a5c28f2c", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.15
[INFO] [stderr]    Compiling pkg-config v0.3.11
[INFO] [stderr]     Checking cfg-if v0.1.2
[INFO] [stderr]     Checking num-traits v0.2.2
[INFO] [stderr]    Compiling unicode-xid v0.0.4
[INFO] [stderr]    Compiling quote v0.3.15
[INFO] [stderr]     Checking fake-simd v0.1.2
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]    Compiling protobuf v1.5.1
[INFO] [stderr]     Checking unicode-width v0.1.4
[INFO] [stderr]     Checking futures v0.1.21
[INFO] [stderr]     Checking vec_map v0.8.0
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]    Compiling bitflags v1.0.3
[INFO] [stderr]    Compiling byteorder v1.2.2
[INFO] [stderr]    Compiling gpg-error v0.3.2
[INFO] [stderr]     Checking custom_derive v0.1.7
[INFO] [stderr]     Checking bit-vec v0.4.4
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking rpassword v2.0.0
[INFO] [stderr]     Checking secstr v0.3.0
[INFO] [stderr]    Compiling proc-macro2 v0.2.3
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.6
[INFO] [stderr]    Compiling atty v0.2.10
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling which v1.0.5
[INFO] [stderr]    Compiling heck v0.3.0
[INFO] [stderr]    Compiling clang-sys v0.21.2
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling textwrap v0.9.0
[INFO] [stderr]    Compiling synom v0.11.3
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]     Checking base64 v0.8.0
[INFO] [stderr]     Checking tempfile v3.0.2
[INFO] [stderr]     Checking conv v0.3.3
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking cstr-argument v0.0.2
[INFO] [stderr]    Compiling cmake v0.1.30
[INFO] [stderr]    Compiling libloading v0.4.3
[INFO] [stderr]    Compiling quote v0.4.2
[INFO] [stderr]    Compiling quote v0.6.3
[INFO] [stderr]    Compiling clap v2.31.2
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]    Compiling libsqlite3-sys v0.9.1
[INFO] [stderr]     Checking thread_local v0.3.5
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]    Compiling protoc v1.5.1
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling tempdir v0.3.7
[INFO] [stderr]    Compiling chrono v0.4.2
[INFO] [stderr]    Compiling gpgme v0.7.2
[INFO] [stderr]     Checking generic-array v0.9.0
[INFO] [stderr]     Checking loggerv v0.7.1
[INFO] [stderr]     Checking gag v0.1.10
[INFO] [stderr]    Compiling syn v0.12.15
[INFO] [stderr]    Compiling syn v0.14.4
[INFO] [stderr]     Checking num-iter v0.1.35
[INFO] [stderr]    Compiling backtrace-sys v0.1.16
[INFO] [stderr]    Compiling libgpg-error-sys v0.3.2
[INFO] [stderr]    Compiling gpgme-sys v0.7.0
[INFO] [stderr]    Compiling miniz-sys v0.1.10
[INFO] [stderr]    Compiling bzip2-sys v0.1.6
[INFO] [stderr]     Checking num-bigint v0.1.43
[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-0.5.6/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 -C metadata=2dc7c9c469bc0372 -C extra-filename=-2dc7c9c469bc0372 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern ucd_util=/opt/rustwide/target/debug/deps/libucd_util-819f6650fb25c7c9.rmeta --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" "62348fb232994df81538031a2ae67c121ebab1ef146d4d9fec315414a5c28f2c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "62348fb232994df81538031a2ae67c121ebab1ef146d4d9fec315414a5c28f2c", kill_on_drop: false }`
[INFO] [stdout] 62348fb232994df81538031a2ae67c121ebab1ef146d4d9fec315414a5c28f2c