Dec 18 12:20:44.260 INFO checking rgm-0.2.1 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 12:20:44.260 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/rgm/0.2.1:/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 18 12:20:44.748 INFO [stdout] 780aa152b953306f85f90ae48bd5fe573341d94ef8c6b5c0392d73c5034a3c10
Dec 18 12:20:44.756 INFO running `"docker" "start" "-a" "780aa152b953306f85f90ae48bd5fe573341d94ef8c6b5c0392d73c5034a3c10"`
Dec 18 12:20:46.168 INFO [stderr]     Checking num-bigint v0.2.2
Dec 18 12:20:46.168 INFO [stderr]    Compiling structopt-derive v0.2.14
Dec 18 12:20:49.592 INFO [stderr]     Checking structopt v0.2.14
Dec 18 12:20:49.966 INFO [stderr]     Checking rgm v0.2.1 (/opt/crater/workdir)
Dec 18 12:20:52.140 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.05s
Dec 18 12:20:52.722 INFO running `"docker" "inspect" "780aa152b953306f85f90ae48bd5fe573341d94ef8c6b5c0392d73c5034a3c10"`
Dec 18 12:20:52.976 INFO running `"docker" "rm" "-f" "780aa152b953306f85f90ae48bd5fe573341d94ef8c6b5c0392d73c5034a3c10"`
Dec 18 12:20:53.242 INFO [stdout] 780aa152b953306f85f90ae48bd5fe573341d94ef8c6b5c0392d73c5034a3c10