Dec 19 13:10:32.117 INFO checking marcbreitung/problem-map-generator-rust against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 13:10:32.117 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/marcbreitung/problem-map-generator-rust:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 13:10:32.700 INFO [stdout] fd7dee2ca6bed9c470a0c2f9c7f64c68e84bea5abc55cd682a3780290704b049
Dec 19 13:10:32.702 INFO running `"docker" "start" "-a" "fd7dee2ca6bed9c470a0c2f9c7f64c68e84bea5abc55cd682a3780290704b049"`
Dec 19 13:10:35.120 INFO [stderr]     Checking num-traits v0.2.1
Dec 19 13:10:36.574 INFO [stderr]     Checking serde_json v1.0.11
Dec 19 13:10:38.743 INFO [stderr]     Checking problem_map_generator v0.0.1 (/opt/crater/workdir)
Dec 19 13:10:40.068 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.03s
Dec 19 13:10:41.401 INFO running `"docker" "inspect" "fd7dee2ca6bed9c470a0c2f9c7f64c68e84bea5abc55cd682a3780290704b049"`
Dec 19 13:10:41.702 INFO running `"docker" "rm" "-f" "fd7dee2ca6bed9c470a0c2f9c7f64c68e84bea5abc55cd682a3780290704b049"`
Dec 19 13:10:42.040 INFO [stdout] fd7dee2ca6bed9c470a0c2f9c7f64c68e84bea5abc55cd682a3780290704b049