Dec 04 18:21:25.768 INFO checking gannonchan/var_study against master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc for pr-56481
Dec 04 18:21:25.768 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/master#c8ae2de8363be088604ffa2ccba84ff7ad7250bc:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/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 04 18:21:26.395 INFO [stdout] 4efe4eac30fdf26877b6dbf7ddf06cf311752584576e3d5576dcbcb5593d3482
Dec 04 18:21:26.397 INFO running `"docker" "start" "-a" "4efe4eac30fdf26877b6dbf7ddf06cf311752584576e3d5576dcbcb5593d3482"`
Dec 04 18:21:27.227 INFO [stderr] usermod: no changes
Dec 04 18:21:27.275 INFO [stderr]     Checking var_study v0.1.0 (/source)
Dec 04 18:21:27.863 INFO [stderr] warning: unused variable: `first_name`
Dec 04 18:21:27.863 INFO [stderr]   --> src/main.rs:23:9
Dec 04 18:21:27.863 INFO [stderr]    |
Dec 04 18:21:27.863 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 04 18:21:27.863 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 04 18:21:27.863 INFO [stderr]    |
Dec 04 18:21:27.863 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 18:21:27.863 INFO [stderr] 
Dec 04 18:21:27.863 INFO [stderr] warning: unused variable: `last_name`
Dec 04 18:21:27.863 INFO [stderr]   --> src/main.rs:24:9
Dec 04 18:21:27.863 INFO [stderr]    |
Dec 04 18:21:27.863 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 04 18:21:27.863 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 04 18:21:27.863 INFO [stderr] 
Dec 04 18:21:27.863 INFO [stderr] warning: unused variable: `f`
Dec 04 18:21:27.863 INFO [stderr]   --> src/main.rs:73:9
Dec 04 18:21:27.863 INFO [stderr]    |
Dec 04 18:21:27.863 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 04 18:21:27.863 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 04 18:21:27.863 INFO [stderr] 
Dec 04 18:21:27.863 INFO [stderr] warning: unused variable: `f`
Dec 04 18:21:27.863 INFO [stderr]   --> src/main.rs:95:9
Dec 04 18:21:27.863 INFO [stderr]    |
Dec 04 18:21:27.863 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 04 18:21:27.863 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 04 18:21:27.863 INFO [stderr] 
Dec 04 18:21:27.863 INFO [stderr] warning: unused variable: `f`
Dec 04 18:21:27.863 INFO [stderr]   --> src/main.rs:97:9
Dec 04 18:21:27.863 INFO [stderr]    |
Dec 04 18:21:27.863 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 04 18:21:27.863 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 04 18:21:27.863 INFO [stderr] 
Dec 04 18:21:27.885 INFO [stderr] warning: unused variable: `first_name`
Dec 04 18:21:27.885 INFO [stderr]   --> src/main.rs:23:9
Dec 04 18:21:27.885 INFO [stderr]    |
Dec 04 18:21:27.885 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 04 18:21:27.885 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 04 18:21:27.885 INFO [stderr]    |
Dec 04 18:21:27.885 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 04 18:21:27.885 INFO [stderr] 
Dec 04 18:21:27.885 INFO [stderr] warning: unused variable: `last_name`
Dec 04 18:21:27.885 INFO [stderr]   --> src/main.rs:24:9
Dec 04 18:21:27.885 INFO [stderr]    |
Dec 04 18:21:27.885 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 04 18:21:27.885 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 04 18:21:27.885 INFO [stderr] 
Dec 04 18:21:27.885 INFO [stderr] warning: unused variable: `f`
Dec 04 18:21:27.885 INFO [stderr]   --> src/main.rs:73:9
Dec 04 18:21:27.885 INFO [stderr]    |
Dec 04 18:21:27.885 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 04 18:21:27.885 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 04 18:21:27.885 INFO [stderr] 
Dec 04 18:21:27.885 INFO [stderr] warning: unused variable: `f`
Dec 04 18:21:27.885 INFO [stderr]   --> src/main.rs:95:9
Dec 04 18:21:27.885 INFO [stderr]    |
Dec 04 18:21:27.886 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 04 18:21:27.886 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 04 18:21:27.886 INFO [stderr] 
Dec 04 18:21:27.886 INFO [stderr] warning: unused variable: `f`
Dec 04 18:21:27.886 INFO [stderr]   --> src/main.rs:97:9
Dec 04 18:21:27.886 INFO [stderr]    |
Dec 04 18:21:27.886 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 04 18:21:27.886 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 04 18:21:27.886 INFO [stderr] 
Dec 04 18:21:27.952 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
Dec 04 18:21:27.954 INFO [stderr] su: No module specific data is present
Dec 04 18:21:29.047 INFO running `"docker" "inspect" "4efe4eac30fdf26877b6dbf7ddf06cf311752584576e3d5576dcbcb5593d3482"`
Dec 04 18:21:29.351 INFO running `"docker" "rm" "-f" "4efe4eac30fdf26877b6dbf7ddf06cf311752584576e3d5576dcbcb5593d3482"`
Dec 04 18:21:29.765 INFO [stdout] 4efe4eac30fdf26877b6dbf7ddf06cf311752584576e3d5576dcbcb5593d3482