[INFO] fetching crate regex 1.4.2...
[INFO] testing regex-1.4.2 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate regex 1.4.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate regex 1.4.2 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate regex 1.4.2
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate regex 1.4.2
[INFO] tweaked toml for crates.io crate regex 1.4.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate regex 1.4.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2199db0c358e7312c9967acabb63a9497989c1650fe63bc4cb9de8454797b2fa
[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" "2199db0c358e7312c9967acabb63a9497989c1650fe63bc4cb9de8454797b2fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2199db0c358e7312c9967acabb63a9497989c1650fe63bc4cb9de8454797b2fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2199db0c358e7312c9967acabb63a9497989c1650fe63bc4cb9de8454797b2fa", kill_on_drop: false }`
[INFO] [stdout] 2199db0c358e7312c9967acabb63a9497989c1650fe63bc4cb9de8454797b2fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--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] adeafd04a6bb544f8ca212dd4ec3393acd998ec316b554702112ac23d3da84f0
[INFO] running `Command { std: "docker" "start" "-a" "adeafd04a6bb544f8ca212dd4ec3393acd998ec316b554702112ac23d3da84f0", kill_on_drop: false }`
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stderr]    Compiling regex v1.4.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.00s
[INFO] running `Command { std: "docker" "inspect" "adeafd04a6bb544f8ca212dd4ec3393acd998ec316b554702112ac23d3da84f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adeafd04a6bb544f8ca212dd4ec3393acd998ec316b554702112ac23d3da84f0", kill_on_drop: false }`
[INFO] [stdout] adeafd04a6bb544f8ca212dd4ec3393acd998ec316b554702112ac23d3da84f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 07bb336c82dd774a5ffa2a58d35abcfa9e77495d4e63d295405817c057f34ab2
[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" "07bb336c82dd774a5ffa2a58d35abcfa9e77495d4e63d295405817c057f34ab2", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling quickcheck v0.8.5
[INFO] [stderr]    Compiling regex v1.4.2 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `regex`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name backtrack tests/test_backtrack.rs --error-format=json --json=diagnostic-rendered-ansi --emit=dep-info,link -C embed-bitcode=no -C debuginfo=2 --test --cfg 'feature="aho-corasick"' --cfg 'feature="default"' --cfg 'feature="memchr"' --cfg 'feature="perf"' --cfg 'feature="perf-cache"' --cfg 'feature="perf-dfa"' --cfg 'feature="perf-inline"' --cfg 'feature="perf-literal"' --cfg 'feature="std"' --cfg 'feature="thread_local"' --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=10a0dfe123d12638 -C extra-filename=-10a0dfe123d12638 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern aho_corasick=/opt/rustwide/target/debug/deps/libaho_corasick-336ff0274051986d.rlib --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-b2d06f7d60fcbb27.rlib --extern memchr=/opt/rustwide/target/debug/deps/libmemchr-e5604f0874edb5fe.rlib --extern quickcheck=/opt/rustwide/target/debug/deps/libquickcheck-60914fbb5039b819.rlib --extern rand=/opt/rustwide/target/debug/deps/librand-79c2fa546a086acd.rlib --extern regex=/opt/rustwide/target/debug/deps/libregex-a834c1407ca561c6.rlib --extern regex_syntax=/opt/rustwide/target/debug/deps/libregex_syntax-2e7c3a315d0632c2.rlib --extern thread_local=/opt/rustwide/target/debug/deps/libthread_local-abd19461110d9879.rlib --cap-lints=warn` (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" "07bb336c82dd774a5ffa2a58d35abcfa9e77495d4e63d295405817c057f34ab2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07bb336c82dd774a5ffa2a58d35abcfa9e77495d4e63d295405817c057f34ab2", kill_on_drop: false }`
[INFO] [stdout] 07bb336c82dd774a5ffa2a58d35abcfa9e77495d4e63d295405817c057f34ab2