Dec 18 06:52:33.485 INFO checking Kriegslustig/ping-pong-rs against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 06:52:33.485 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/Kriegslustig/ping-pong-rs:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 06:52:34.108 INFO [stdout] 830d0a4eec8690a156ad78e5f98cceb248a538be19e35c5665630ca3b65e4bbe
Dec 18 06:52:34.111 INFO running `"docker" "start" "-a" "830d0a4eec8690a156ad78e5f98cceb248a538be19e35c5665630ca3b65e4bbe"`
Dec 18 06:52:35.716 INFO [stderr]     Checking ping-pong v0.1.0 (/opt/crater/workdir)
Dec 18 06:52:36.224 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 06:52:36.224 INFO [stderr]    --> src/main.rs:152:17
Dec 18 06:52:36.224 INFO [stderr]     |
Dec 18 06:52:36.224 INFO [stderr] 152 |                 socket.send(&bye);
Dec 18 06:52:36.224 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^
Dec 18 06:52:36.224 INFO [stderr]     |
Dec 18 06:52:36.224 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 06:52:36.224 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 06:52:36.224 INFO [stderr] 
Dec 18 06:52:36.260 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 06:52:36.260 INFO [stderr]    --> src/main.rs:152:17
Dec 18 06:52:36.260 INFO [stderr]     |
Dec 18 06:52:36.260 INFO [stderr] 152 |                 socket.send(&bye);
Dec 18 06:52:36.260 INFO [stderr]     |                 ^^^^^^^^^^^^^^^^^^
Dec 18 06:52:36.260 INFO [stderr]     |
Dec 18 06:52:36.260 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 18 06:52:36.260 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 06:52:36.260 INFO [stderr] 
Dec 18 06:52:36.296 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.61s
Dec 18 06:52:37.564 INFO running `"docker" "inspect" "830d0a4eec8690a156ad78e5f98cceb248a538be19e35c5665630ca3b65e4bbe"`
Dec 18 06:52:37.854 INFO running `"docker" "rm" "-f" "830d0a4eec8690a156ad78e5f98cceb248a538be19e35c5665630ca3b65e4bbe"`
Dec 18 06:52:38.228 INFO [stdout] 830d0a4eec8690a156ad78e5f98cceb248a538be19e35c5665630ca3b65e4bbe