Dec 18 07:27:09.040 INFO checking GovTechSG/chkr against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 07:27:09.040 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/GovTechSG/chkr:/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 07:27:09.448 INFO [stdout] 9d1bdf1521fe8e5ce1a32997fbcb987f194a5b9e3664aff1c8a8079ed48866f3
Dec 18 07:27:09.454 INFO running `"docker" "start" "-a" "9d1bdf1521fe8e5ce1a32997fbcb987f194a5b9e3664aff1c8a8079ed48866f3"`
Dec 18 07:27:10.703 INFO [stderr]     Checking assert_matches v1.1.0
Dec 18 07:27:10.744 INFO [stderr]     Checking docopt v0.6.86
Dec 18 07:27:12.066 INFO [stderr]     Checking chkr v0.1.0 (/opt/crater/workdir)
Dec 18 07:27:12.677 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.08s
Dec 18 07:27:13.154 INFO running `"docker" "inspect" "9d1bdf1521fe8e5ce1a32997fbcb987f194a5b9e3664aff1c8a8079ed48866f3"`
Dec 18 07:27:13.520 INFO running `"docker" "rm" "-f" "9d1bdf1521fe8e5ce1a32997fbcb987f194a5b9e3664aff1c8a8079ed48866f3"`
Dec 18 07:27:13.812 INFO [stdout] 9d1bdf1521fe8e5ce1a32997fbcb987f194a5b9e3664aff1c8a8079ed48866f3