Dec 18 12:02:46.403 INFO checking rspec-1.0.0-beta.4 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 12:02:46.403 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/reg/rspec/1.0.0-beta.4:/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 12:02:46.818 INFO [stdout] 7391452b55afba8da85b4541bdf69130bcf163a4a5894a6f4c1bf6b824596dad
Dec 18 12:02:46.820 INFO running `"docker" "start" "-a" "7391452b55afba8da85b4541bdf69130bcf163a4a5894a6f4c1bf6b824596dad"`
Dec 18 12:02:48.789 INFO [stderr]    Compiling derive-new v0.5.6
Dec 18 12:02:48.792 INFO [stderr]     Checking rayon v0.8.2
Dec 18 12:02:53.432 INFO [stderr]     Checking rspec v1.0.0-beta.4 (/opt/crater/workdir)
Dec 18 12:02:56.484 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.91s
Dec 18 12:02:57.350 INFO running `"docker" "inspect" "7391452b55afba8da85b4541bdf69130bcf163a4a5894a6f4c1bf6b824596dad"`
Dec 18 12:02:57.652 INFO running `"docker" "rm" "-f" "7391452b55afba8da85b4541bdf69130bcf163a4a5894a6f4c1bf6b824596dad"`
Dec 18 12:02:58.064 INFO [stdout] 7391452b55afba8da85b4541bdf69130bcf163a4a5894a6f4c1bf6b824596dad