Dec 19 22:06:46.380 INFO checking RobotDisco/rust_chat against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 22:06:46.380 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/RobotDisco/rust_chat:/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 22:06:46.830 INFO [stdout] bed520f65d034989f14741a58918edd7fc557d8e18e3adfac142cf06807aa836
Dec 19 22:06:46.832 INFO running `"docker" "start" "-a" "bed520f65d034989f14741a58918edd7fc557d8e18e3adfac142cf06807aa836"`
Dec 19 22:06:49.398 INFO [stderr]     Checking sha1 v0.1.1
Dec 19 22:06:49.412 INFO [stderr]     Checking http-muncher v0.2.5
Dec 19 22:06:49.424 INFO [stderr]     Checking mio v0.5.1
Dec 19 22:06:51.100 INFO [stderr]     Checking chat v0.1.0 (/opt/crater/workdir)
Dec 19 22:06:52.054 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.78s
Dec 19 22:06:53.312 INFO running `"docker" "inspect" "bed520f65d034989f14741a58918edd7fc557d8e18e3adfac142cf06807aa836"`
Dec 19 22:06:53.710 INFO running `"docker" "rm" "-f" "bed520f65d034989f14741a58918edd7fc557d8e18e3adfac142cf06807aa836"`
Dec 19 22:06:54.144 INFO [stdout] bed520f65d034989f14741a58918edd7fc557d8e18e3adfac142cf06807aa836