Dec 17 19:56:46.867 INFO checking mattrayner/learning-rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 19:56:46.867 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/mattrayner/learning-rust:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 19:56:47.359 INFO [stdout] 6906d64d8fccc660c061181d47abb2f0889264a391aa5ea9e7707971b7e33174
Dec 17 19:56:47.361 INFO running `"docker" "start" "-a" "6906d64d8fccc660c061181d47abb2f0889264a391aa5ea9e7707971b7e33174"`
Dec 17 19:56:50.088 INFO [stderr]     Checking libc v0.2.38
Dec 17 19:56:51.337 INFO [stderr]     Checking rand v0.4.2
Dec 17 19:56:52.716 INFO [stderr]     Checking learning-rust v0.1.0 (/opt/crater/workdir)
Dec 17 19:56:53.690 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.68s
Dec 17 19:56:54.455 INFO running `"docker" "inspect" "6906d64d8fccc660c061181d47abb2f0889264a391aa5ea9e7707971b7e33174"`
Dec 17 19:56:54.788 INFO running `"docker" "rm" "-f" "6906d64d8fccc660c061181d47abb2f0889264a391aa5ea9e7707971b7e33174"`
Dec 17 19:56:55.045 INFO [stdout] 6906d64d8fccc660c061181d47abb2f0889264a391aa5ea9e7707971b7e33174