Dec 19 20:12:51.391 INFO checking austbot/tab against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 20:12:51.391 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/austbot/tab:/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 20:12:51.749 INFO [stdout] 1208930c4c955045128125b522b71ee3b19c24e9baf0fd0a4b368c0aa9c25aed
Dec 19 20:12:51.756 INFO running `"docker" "start" "-a" "1208930c4c955045128125b522b71ee3b19c24e9baf0fd0a4b368c0aa9c25aed"`
Dec 19 20:12:53.405 INFO [stderr]     Checking swim v0.1.0 (/opt/crater/workdir/swim)
Dec 19 20:12:53.760 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 20:12:53.760 INFO [stderr]   --> swim/src/lib.rs:54:9
Dec 19 20:12:53.760 INFO [stderr]    |
Dec 19 20:12:53.760 INFO [stderr] 54 |         self.sender.as_ref().unwrap().send(job);
Dec 19 20:12:53.760 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 20:12:53.760 INFO [stderr]    |
Dec 19 20:12:53.760 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 20:12:53.760 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 20:12:53.760 INFO [stderr] 
Dec 19 20:12:53.781 INFO [stderr]     Checking tab v0.1.0 (/opt/crater/workdir)
Dec 19 20:12:53.964 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 20:12:53.965 INFO [stderr]   --> swim/src/lib.rs:54:9
Dec 19 20:12:53.965 INFO [stderr]    |
Dec 19 20:12:53.965 INFO [stderr] 54 |         self.sender.as_ref().unwrap().send(job);
Dec 19 20:12:53.965 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 20:12:53.965 INFO [stderr]    |
Dec 19 20:12:53.965 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 20:12:53.965 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 20:12:53.965 INFO [stderr] 
Dec 19 20:12:54.361 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.02s
Dec 19 20:12:54.890 INFO running `"docker" "inspect" "1208930c4c955045128125b522b71ee3b19c24e9baf0fd0a4b368c0aa9c25aed"`
Dec 19 20:12:55.152 INFO running `"docker" "rm" "-f" "1208930c4c955045128125b522b71ee3b19c24e9baf0fd0a4b368c0aa9c25aed"`
Dec 19 20:12:55.422 INFO [stdout] 1208930c4c955045128125b522b71ee3b19c24e9baf0fd0a4b368c0aa9c25aed