Dec 17 22:53:27.191 INFO checking intrepion/example-x-rust-x-rustbyexample-com-x-error-option_with_result-combinator_combinations against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 22:53:27.191 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/intrepion/example-x-rust-x-rustbyexample-com-x-error-option_with_result-combinator_combinations:/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 17 22:53:27.402 INFO [stdout] 6e4c7218e8b47695713dc0e89fa38f92868eaf6b2adc823f4a769a4321fd87c4
Dec 17 22:53:27.404 INFO running `"docker" "start" "-a" "6e4c7218e8b47695713dc0e89fa38f92868eaf6b2adc823f4a769a4321fd87c4"`
Dec 17 22:53:28.106 INFO [stderr]     Checking example-x-rust-x-rustbyexample-com-x-error-option_with_result-combinator_combinations v0.1.0 (/opt/crater/workdir)
Dec 17 22:53:28.342 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.25s
Dec 17 22:53:28.605 INFO running `"docker" "inspect" "6e4c7218e8b47695713dc0e89fa38f92868eaf6b2adc823f4a769a4321fd87c4"`
Dec 17 22:53:28.722 INFO running `"docker" "rm" "-f" "6e4c7218e8b47695713dc0e89fa38f92868eaf6b2adc823f4a769a4321fd87c4"`
Dec 17 22:53:28.799 INFO [stdout] 6e4c7218e8b47695713dc0e89fa38f92868eaf6b2adc823f4a769a4321fd87c4