[INFO] fetching crate mk66f18 0.2.0...
[INFO] testing mk66f18-0.2.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate mk66f18 0.2.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate mk66f18 0.2.0 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mk66f18 0.2.0
[INFO] finished tweaking crates.io crate mk66f18 0.2.0
[INFO] tweaked toml for crates.io crate mk66f18 0.2.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate mk66f18 0.2.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a046f62ac1edbfbf0ad57a8100bdd37594add83fb08f4a9ccdf29cff4afdcf42
[INFO] running `"docker" "start" "-a" "a046f62ac1edbfbf0ad57a8100bdd37594add83fb08f4a9ccdf29cff4afdcf42"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling cortex-m v0.6.1
[INFO] [stderr]    Compiling vcell v0.1.0
[INFO] [stderr]    Compiling mk66f18 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]    Compiling volatile-register v0.2.0
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling as-slice v0.1.0
[INFO] [stderr]    Compiling aligned v0.3.1
[INFO] [stderr] error: could not compile `mk66f18`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name mk66f18 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi --crate-type lib --emit=dep-info,metadata,link -Cembed-bitcode=no -C debuginfo=2 -C metadata=520e5f715f5be5e9 -C extra-filename=-520e5f715f5be5e9 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-36c28b2b5eb0af36.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-a54d7fc797a1efa0.rmeta --extern vcell=/opt/rustwide/target/debug/deps/libvcell-5299676fe01a2b2e.rmeta --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "a046f62ac1edbfbf0ad57a8100bdd37594add83fb08f4a9ccdf29cff4afdcf42"`
[INFO] running `"docker" "rm" "-f" "a046f62ac1edbfbf0ad57a8100bdd37594add83fb08f4a9ccdf29cff4afdcf42"`
[INFO] [stdout] a046f62ac1edbfbf0ad57a8100bdd37594add83fb08f4a9ccdf29cff4afdcf42