Dec 05 02:48:21.860 INFO checking DogLi/mio_test against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 05 02:48:21.860 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-3/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/pr-56481/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +c8ae2de8363be088604ffa2ccba84ff7ad7250bc-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 02:48:22.303 INFO [stdout] 83c7b22680189c3a108b28495b45ecc89babca83f6e5d1d5f3f88c4ca6b23c2b
Dec 05 02:48:22.305 INFO running `"docker" "start" "-a" "83c7b22680189c3a108b28495b45ecc89babca83f6e5d1d5f3f88c4ca6b23c2b"`
Dec 05 02:48:23.782 INFO [stderr] usermod: no changes
Dec 05 02:48:23.931 INFO [stderr]     Checking memchr v0.1.11
Dec 05 02:48:23.975 INFO [stderr]     Checking thread-id v2.0.0
Dec 05 02:48:24.723 INFO [stderr]     Checking thread_local v0.2.7
Dec 05 02:48:24.768 INFO [stderr]     Checking aho-corasick v0.5.3
Dec 05 02:48:26.150 INFO [stderr]     Checking regex v0.1.80
Dec 05 02:48:28.567 INFO [stderr]     Checking env_logger v0.3.5
Dec 05 02:48:29.548 INFO [stderr]     Checking mio_test v0.1.0 (/source)
Dec 05 02:48:32.302 INFO [stderr] warning: unused `#[macro_use]` import
Dec 05 02:48:32.302 INFO [stderr]  --> src/client.rs:2:1
Dec 05 02:48:32.302 INFO [stderr]   |
Dec 05 02:48:32.302 INFO [stderr] 2 | #[macro_use] extern crate log;
Dec 05 02:48:32.302 INFO [stderr]   | ^^^^^^^^^^^^
Dec 05 02:48:32.302 INFO [stderr]   |
Dec 05 02:48:32.302 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 02:48:32.302 INFO [stderr] 
Dec 05 02:48:32.556 INFO [stderr] warning: unused variable: `n`
Dec 05 02:48:32.556 INFO [stderr]   --> src/client.rs:17:12
Dec 05 02:48:32.557 INFO [stderr]    |
Dec 05 02:48:32.557 INFO [stderr] 17 |         Ok(n) => {
Dec 05 02:48:32.557 INFO [stderr]    |            ^ help: consider using `_n` instead
Dec 05 02:48:32.571 INFO [stderr]    |
Dec 05 02:48:32.571 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 02:48:32.571 INFO [stderr] 
Dec 05 02:48:32.948 INFO [stderr] warning: unused `#[macro_use]` import
Dec 05 02:48:32.948 INFO [stderr]  --> src/client.rs:2:1
Dec 05 02:48:32.948 INFO [stderr]   |
Dec 05 02:48:32.948 INFO [stderr] 2 | #[macro_use] extern crate log;
Dec 05 02:48:32.948 INFO [stderr]   | ^^^^^^^^^^^^
Dec 05 02:48:32.948 INFO [stderr]   |
Dec 05 02:48:32.948 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 05 02:48:32.948 INFO [stderr] 
Dec 05 02:48:33.167 INFO [stderr] warning: unused variable: `n`
Dec 05 02:48:33.167 INFO [stderr]   --> src/client.rs:17:12
Dec 05 02:48:33.167 INFO [stderr]    |
Dec 05 02:48:33.168 INFO [stderr] 17 |         Ok(n) => {
Dec 05 02:48:33.168 INFO [stderr]    |            ^ help: consider using `_n` instead
Dec 05 02:48:33.168 INFO [stderr]    |
Dec 05 02:48:33.168 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 05 02:48:33.169 INFO [stderr] 
Dec 05 02:48:33.509 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.70s
Dec 05 02:48:33.514 INFO [stderr] su: No module specific data is present
Dec 05 02:48:34.646 INFO running `"docker" "inspect" "83c7b22680189c3a108b28495b45ecc89babca83f6e5d1d5f3f88c4ca6b23c2b"`
Dec 05 02:48:35.047 INFO running `"docker" "rm" "-f" "83c7b22680189c3a108b28495b45ecc89babca83f6e5d1d5f3f88c4ca6b23c2b"`
Dec 05 02:48:35.395 INFO [stdout] 83c7b22680189c3a108b28495b45ecc89babca83f6e5d1d5f3f88c4ca6b23c2b