Dec 19 12:16:23.579 INFO checking mt-caret/c10e against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 12:16:23.579 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-6/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/mt-caret/c10e:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:16:23.956 INFO [stdout] e8db9fd2ac4d154b027e1812bb79ab064223f2e87add2a84649732ea3b8bc9ac
Dec 19 12:16:23.977 INFO running `"docker" "start" "-a" "e8db9fd2ac4d154b027e1812bb79ab064223f2e87add2a84649732ea3b8bc9ac"`
Dec 19 12:16:24.635 INFO [stderr]     Checking natural v0.3.0
Dec 19 12:16:24.635 INFO [stderr]    Compiling stemmer v0.3.2
Dec 19 12:16:26.760 INFO [stderr]     Checking c10e v0.1.0 (/opt/crater/workdir)
Dec 19 12:16:27.105 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.51s
Dec 19 12:16:27.410 INFO running `"docker" "inspect" "e8db9fd2ac4d154b027e1812bb79ab064223f2e87add2a84649732ea3b8bc9ac"`
Dec 19 12:16:27.537 INFO running `"docker" "rm" "-f" "e8db9fd2ac4d154b027e1812bb79ab064223f2e87add2a84649732ea3b8bc9ac"`
Dec 19 12:16:27.657 INFO [stdout] e8db9fd2ac4d154b027e1812bb79ab064223f2e87add2a84649732ea3b8bc9ac