Dec 19 11:21:11.063 INFO checking overlandandseas/web-socket-rust-demo against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 11:21:11.064 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-3/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/overlandandseas/web-socket-rust-demo:/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 11:21:11.420 INFO [stdout] 6adfa0d67029c3acf7f31a8eeb9282137b8d729ec4402aa25296c95aeff0571d
Dec 19 11:21:11.426 INFO running `"docker" "start" "-a" "6adfa0d67029c3acf7f31a8eeb9282137b8d729ec4402aa25296c95aeff0571d"`
Dec 19 11:21:12.822 INFO [stderr]     Checking env_logger v0.5.8
Dec 19 11:21:12.832 INFO [stderr]     Checking ws v0.7.6
Dec 19 11:21:14.817 INFO [stderr]     Checking web-sockets-modules v0.1.0 (/opt/crater/workdir)
Dec 19 11:21:15.264 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.59s
Dec 19 11:21:15.730 INFO running `"docker" "inspect" "6adfa0d67029c3acf7f31a8eeb9282137b8d729ec4402aa25296c95aeff0571d"`
Dec 19 11:21:15.892 INFO running `"docker" "rm" "-f" "6adfa0d67029c3acf7f31a8eeb9282137b8d729ec4402aa25296c95aeff0571d"`
Dec 19 11:21:16.174 INFO [stdout] 6adfa0d67029c3acf7f31a8eeb9282137b8d729ec4402aa25296c95aeff0571d