Dec 19 07:20:07.459 INFO checking thara/rust-tcp-echo-server against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 07:20:07.459 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/thara/rust-tcp-echo-server:/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 07:20:08.012 INFO [stdout] 4fa2960e3def1929779455300eb37e05ff4a05d9d0bedfaae1bf89d9e9b79c12
Dec 19 07:20:08.015 INFO running `"docker" "start" "-a" "4fa2960e3def1929779455300eb37e05ff4a05d9d0bedfaae1bf89d9e9b79c12"`
Dec 19 07:20:10.412 INFO [stderr]     Checking nix v0.9.0
Dec 19 07:20:15.312 INFO [stderr]     Checking tcp-echo-server v0.1.0 (/opt/crater/workdir)
Dec 19 07:20:15.981 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.67s
Dec 19 07:20:17.100 INFO running `"docker" "inspect" "4fa2960e3def1929779455300eb37e05ff4a05d9d0bedfaae1bf89d9e9b79c12"`
Dec 19 07:20:17.470 INFO running `"docker" "rm" "-f" "4fa2960e3def1929779455300eb37e05ff4a05d9d0bedfaae1bf89d9e9b79c12"`
Dec 19 07:20:17.736 INFO [stdout] 4fa2960e3def1929779455300eb37e05ff4a05d9d0bedfaae1bf89d9e9b79c12