Dec 18 02:09:28.570 INFO checking cowang4/rusty_tree against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 02:09:28.570 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-7/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/cowang4/rusty_tree:/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 02:09:29.010 INFO [stdout] 4c1fcd80d5bce1d0dfe3a008b0a73e663f63b6c1b08b27f801905c7390ea1862
Dec 18 02:09:29.016 INFO running `"docker" "start" "-a" "4c1fcd80d5bce1d0dfe3a008b0a73e663f63b6c1b08b27f801905c7390ea1862"`
Dec 18 02:09:30.592 INFO [stderr]    Compiling serde_derive v1.0.57
Dec 18 02:09:44.332 INFO [stderr]     Checking docopt v1.0.0
Dec 18 02:09:45.748 INFO [stderr]     Checking rusty_tree v0.1.0 (/opt/crater/workdir)
Dec 18 02:09:47.932 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 17.46s
Dec 18 02:09:48.962 INFO running `"docker" "inspect" "4c1fcd80d5bce1d0dfe3a008b0a73e663f63b6c1b08b27f801905c7390ea1862"`
Dec 18 02:09:49.304 INFO running `"docker" "rm" "-f" "4c1fcd80d5bce1d0dfe3a008b0a73e663f63b6c1b08b27f801905c7390ea1862"`
Dec 18 02:09:49.672 INFO [stdout] 4c1fcd80d5bce1d0dfe3a008b0a73e663f63b6c1b08b27f801905c7390ea1862