[INFO] crate mk66f18 0.2.0 is already in cache
[INFO] checking mk66f18-0.2.0 against master#4007d4ef26eab44bdabc2b7574d032152264d3ad for pr-66919
[INFO] extracting crate mk66f18 0.2.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate mk66f18 0.2.0 on toolchain 4007d4ef26eab44bdabc2b7574d032152264d3ad
[INFO] running `"/workspace/cargo-home/bin/cargo" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "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-3/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" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "+4007d4ef26eab44bdabc2b7574d032152264d3ad" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f430454747adef6edb83080017b877b1d145f642efff28afd9c074b2c2aacfde
[INFO] running `"docker" "start" "-a" "f430454747adef6edb83080017b877b1d145f642efff28afd9c074b2c2aacfde"`
[INFO] [stderr]     Checking vcell v0.1.0
[INFO] [stderr]    Compiling mk66f18 v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling bare-metal v0.2.4
[INFO] [stderr]     Checking as-slice v0.1.0
[INFO] [stderr]     Checking volatile-register v0.2.0
[INFO] [stderr]     Checking aligned v0.3.1
[INFO] [stderr]     Checking cortex-m v0.6.1
[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 --emit=dep-info,metadata -C debuginfo=2 --test -C metadata=193fe3b3fdc642c6 -C extra-filename=-193fe3b3fdc642c6 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-a68b42485ffca255.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-71ce71866e607ce5.rmeta --extern vcell=/opt/rustwide/target/debug/deps/libvcell-783fa51040644335.rmeta --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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 -C debuginfo=2 -C metadata=4d9aaef6c01c03f2 -C extra-filename=-4d9aaef6c01c03f2 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --extern bare_metal=/opt/rustwide/target/debug/deps/libbare_metal-a68b42485ffca255.rmeta --extern cortex_m=/opt/rustwide/target/debug/deps/libcortex_m-71ce71866e607ce5.rmeta --extern vcell=/opt/rustwide/target/debug/deps/libvcell-783fa51040644335.rmeta --cap-lints=forbid` (signal: 9, SIGKILL: kill)
[INFO] running `"docker" "inspect" "f430454747adef6edb83080017b877b1d145f642efff28afd9c074b2c2aacfde"`
[INFO] running `"docker" "rm" "-f" "f430454747adef6edb83080017b877b1d145f642efff28afd9c074b2c2aacfde"`
[INFO] [stdout] f430454747adef6edb83080017b877b1d145f642efff28afd9c074b2c2aacfde