Dec 18 07:55:30.061 INFO checking DogLi/mio_test against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 07:55:30.061 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/DogLi/mio_test:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 07:55:30.525 INFO [stdout] f08805d88e5b98d9ee2fa54fded890578a12c0ddd3456bbe015c173eb6f53e21
Dec 18 07:55:30.527 INFO running `"docker" "start" "-a" "f08805d88e5b98d9ee2fa54fded890578a12c0ddd3456bbe015c173eb6f53e21"`
Dec 18 07:55:32.852 INFO [stderr]     Checking memchr v0.1.11
Dec 18 07:55:32.860 INFO [stderr]     Checking thread-id v2.0.0
Dec 18 07:55:33.311 INFO [stderr]     Checking thread_local v0.2.7
Dec 18 07:55:33.517 INFO [stderr]     Checking aho-corasick v0.5.3
Dec 18 07:55:34.354 INFO [stderr]     Checking regex v0.1.80
Dec 18 07:55:36.506 INFO [stderr]     Checking env_logger v0.3.5
Dec 18 07:55:37.036 INFO [stderr]     Checking mio_test v0.1.0 (/opt/crater/workdir)
Dec 18 07:55:38.156 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 07:55:38.157 INFO [stderr]  --> src/client.rs:2:1
Dec 18 07:55:38.157 INFO [stderr]   |
Dec 18 07:55:38.157 INFO [stderr] 2 | #[macro_use] extern crate log;
Dec 18 07:55:38.157 INFO [stderr]   | ^^^^^^^^^^^^
Dec 18 07:55:38.157 INFO [stderr]   |
Dec 18 07:55:38.158 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 07:55:38.158 INFO [stderr] 
Dec 18 07:55:38.188 INFO [stderr] warning: unused `#[macro_use]` import
Dec 18 07:55:38.188 INFO [stderr]  --> src/client.rs:2:1
Dec 18 07:55:38.188 INFO [stderr]   |
Dec 18 07:55:38.188 INFO [stderr] 2 | #[macro_use] extern crate log;
Dec 18 07:55:38.188 INFO [stderr]   | ^^^^^^^^^^^^
Dec 18 07:55:38.188 INFO [stderr]   |
Dec 18 07:55:38.188 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 07:55:38.188 INFO [stderr] 
Dec 18 07:55:38.352 INFO [stderr] warning: unused variable: `n`
Dec 18 07:55:38.352 INFO [stderr]   --> src/client.rs:17:12
Dec 18 07:55:38.352 INFO [stderr]    |
Dec 18 07:55:38.352 INFO [stderr] 17 |         Ok(n) => {
Dec 18 07:55:38.352 INFO [stderr]    |            ^ help: consider using `_n` instead
Dec 18 07:55:38.352 INFO [stderr]    |
Dec 18 07:55:38.352 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 07:55:38.352 INFO [stderr] 
Dec 18 07:55:38.384 INFO [stderr] warning: unused variable: `n`
Dec 18 07:55:38.384 INFO [stderr]   --> src/client.rs:17:12
Dec 18 07:55:38.384 INFO [stderr]    |
Dec 18 07:55:38.384 INFO [stderr] 17 |         Ok(n) => {
Dec 18 07:55:38.384 INFO [stderr]    |            ^ help: consider using `_n` instead
Dec 18 07:55:38.384 INFO [stderr]    |
Dec 18 07:55:38.384 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 07:55:38.384 INFO [stderr] 
Dec 18 07:55:39.041 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.29s
Dec 18 07:55:40.334 INFO running `"docker" "inspect" "f08805d88e5b98d9ee2fa54fded890578a12c0ddd3456bbe015c173eb6f53e21"`
Dec 18 07:55:40.686 INFO running `"docker" "rm" "-f" "f08805d88e5b98d9ee2fa54fded890578a12c0ddd3456bbe015c173eb6f53e21"`
Dec 18 07:55:40.951 INFO [stdout] f08805d88e5b98d9ee2fa54fded890578a12c0ddd3456bbe015c173eb6f53e21