Dec 19 14:31:59.079 INFO checking kcexn/learn_rust_palindrome_checker against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 14:31:59.081 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/kcexn/learn_rust_palindrome_checker:/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 14:31:59.344 INFO [stdout] 50907dda16a8c5a3e7e025f4bc3e67f43d5ca9bd4450f7b6a8570b84e73daeaa
Dec 19 14:31:59.349 INFO running `"docker" "start" "-a" "50907dda16a8c5a3e7e025f4bc3e67f43d5ca9bd4450f7b6a8570b84e73daeaa"`
Dec 19 14:32:00.160 INFO [stderr]     Checking utils v0.1.0 (/opt/crater/workdir/utils)
Dec 19 14:32:00.306 INFO [stderr]     Checking palindrome_checker v0.1.0 (/opt/crater/workdir)
Dec 19 14:32:00.509 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.36s
Dec 19 14:32:00.921 INFO running `"docker" "inspect" "50907dda16a8c5a3e7e025f4bc3e67f43d5ca9bd4450f7b6a8570b84e73daeaa"`
Dec 19 14:32:01.012 INFO running `"docker" "rm" "-f" "50907dda16a8c5a3e7e025f4bc3e67f43d5ca9bd4450f7b6a8570b84e73daeaa"`
Dec 19 14:32:01.097 INFO [stdout] 50907dda16a8c5a3e7e025f4bc3e67f43d5ca9bd4450f7b6a8570b84e73daeaa