Dec 19 08:45:06.049 INFO checking simonhdickson/rcc against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 08:45:06.049 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/simonhdickson/rcc:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 08:45:06.529 INFO [stdout] a99a28d53499c16f55a2f31bc38787e3dded6ce5ed46af697e2892c2f2ff2f0f
Dec 19 08:45:06.531 INFO running `"docker" "start" "-a" "a99a28d53499c16f55a2f31bc38787e3dded6ce5ed46af697e2892c2f2ff2f0f"`
Dec 19 08:45:08.887 INFO [stderr]     Checking backtrace v0.3.9
Dec 19 08:45:09.396 INFO [stderr]     Checking failure v0.1.1
Dec 19 08:45:09.883 INFO [stderr]     Checking rcc v0.1.0 (/opt/crater/workdir)
Dec 19 08:45:10.989 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.19s
Dec 19 08:45:11.951 INFO running `"docker" "inspect" "a99a28d53499c16f55a2f31bc38787e3dded6ce5ed46af697e2892c2f2ff2f0f"`
Dec 19 08:45:12.136 INFO running `"docker" "rm" "-f" "a99a28d53499c16f55a2f31bc38787e3dded6ce5ed46af697e2892c2f2ff2f0f"`
Dec 19 08:45:12.452 INFO [stdout] a99a28d53499c16f55a2f31bc38787e3dded6ce5ed46af697e2892c2f2ff2f0f