Nov 30 02:40:37.046 INFO checking gannonchan/var_study against master#a49316ddc99d9d595193557fc899f6c52e4d9af9 for pr-56323
Nov 30 02:40:37.046 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56323/worker-1/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/pr-56323/master#a49316ddc99d9d595193557fc899f6c52e4d9af9:/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 +a49316ddc99d9d595193557fc899f6c52e4d9af9-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"`
Nov 30 02:40:37.380 INFO [stdout] 45ba255973e64a7ac6207f6ff633decc3c618b41f5bc8d42f80ba981a34ca768
Nov 30 02:40:37.384 INFO running `"docker" "start" "-a" "45ba255973e64a7ac6207f6ff633decc3c618b41f5bc8d42f80ba981a34ca768"`
Nov 30 02:40:38.780 INFO [stderr] usermod: no changes
Nov 30 02:40:38.832 INFO [stderr]     Checking var_study v0.1.0 (/source)
Nov 30 02:40:39.386 INFO [stderr] warning: unused variable: `first_name`
Nov 30 02:40:39.386 INFO [stderr]   --> src/main.rs:23:9
Nov 30 02:40:39.386 INFO [stderr]    |
Nov 30 02:40:39.386 INFO [stderr] 23 |     let first_name = String::from("0");
Nov 30 02:40:39.386 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Nov 30 02:40:39.386 INFO [stderr]    |
Nov 30 02:40:39.386 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 30 02:40:39.386 INFO [stderr] 
Nov 30 02:40:39.386 INFO [stderr] warning: unused variable: `last_name`
Nov 30 02:40:39.386 INFO [stderr]   --> src/main.rs:24:9
Nov 30 02:40:39.386 INFO [stderr]    |
Nov 30 02:40:39.386 INFO [stderr] 24 |     let last_name = String::from("张三");
Nov 30 02:40:39.386 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Nov 30 02:40:39.386 INFO [stderr] 
Nov 30 02:40:39.386 INFO [stderr] warning: unused variable: `f`
Nov 30 02:40:39.386 INFO [stderr]   --> src/main.rs:73:9
Nov 30 02:40:39.386 INFO [stderr]    |
Nov 30 02:40:39.386 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Nov 30 02:40:39.386 INFO [stderr]    |         ^ help: consider using `_f` instead
Nov 30 02:40:39.386 INFO [stderr] 
Nov 30 02:40:39.386 INFO [stderr] warning: unused variable: `f`
Nov 30 02:40:39.386 INFO [stderr]   --> src/main.rs:95:9
Nov 30 02:40:39.386 INFO [stderr]    |
Nov 30 02:40:39.386 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Nov 30 02:40:39.386 INFO [stderr]    |         ^ help: consider using `_f` instead
Nov 30 02:40:39.386 INFO [stderr] 
Nov 30 02:40:39.386 INFO [stderr] warning: unused variable: `f`
Nov 30 02:40:39.386 INFO [stderr]   --> src/main.rs:97:9
Nov 30 02:40:39.386 INFO [stderr]    |
Nov 30 02:40:39.386 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Nov 30 02:40:39.386 INFO [stderr]    |         ^ help: consider using `_f` instead
Nov 30 02:40:39.386 INFO [stderr] 
Nov 30 02:40:39.509 INFO [stderr] warning: unused variable: `first_name`
Nov 30 02:40:39.509 INFO [stderr]   --> src/main.rs:23:9
Nov 30 02:40:39.509 INFO [stderr]    |
Nov 30 02:40:39.509 INFO [stderr] 23 |     let first_name = String::from("0");
Nov 30 02:40:39.509 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Nov 30 02:40:39.509 INFO [stderr]    |
Nov 30 02:40:39.509 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Nov 30 02:40:39.509 INFO [stderr] 
Nov 30 02:40:39.509 INFO [stderr] warning: unused variable: `last_name`
Nov 30 02:40:39.509 INFO [stderr]   --> src/main.rs:24:9
Nov 30 02:40:39.509 INFO [stderr]    |
Nov 30 02:40:39.509 INFO [stderr] 24 |     let last_name = String::from("张三");
Nov 30 02:40:39.509 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Nov 30 02:40:39.509 INFO [stderr] 
Nov 30 02:40:39.509 INFO [stderr] warning: unused variable: `f`
Nov 30 02:40:39.509 INFO [stderr]   --> src/main.rs:73:9
Nov 30 02:40:39.509 INFO [stderr]    |
Nov 30 02:40:39.509 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Nov 30 02:40:39.509 INFO [stderr]    |         ^ help: consider using `_f` instead
Nov 30 02:40:39.509 INFO [stderr] 
Nov 30 02:40:39.509 INFO [stderr] warning: unused variable: `f`
Nov 30 02:40:39.509 INFO [stderr]   --> src/main.rs:95:9
Nov 30 02:40:39.509 INFO [stderr]    |
Nov 30 02:40:39.509 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Nov 30 02:40:39.509 INFO [stderr]    |         ^ help: consider using `_f` instead
Nov 30 02:40:39.509 INFO [stderr] 
Nov 30 02:40:39.509 INFO [stderr] warning: unused variable: `f`
Nov 30 02:40:39.509 INFO [stderr]   --> src/main.rs:97:9
Nov 30 02:40:39.509 INFO [stderr]    |
Nov 30 02:40:39.509 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Nov 30 02:40:39.509 INFO [stderr]    |         ^ help: consider using `_f` instead
Nov 30 02:40:39.509 INFO [stderr] 
Nov 30 02:40:39.553 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
Nov 30 02:40:39.555 INFO [stderr] su: No module specific data is present
Nov 30 02:40:40.062 INFO running `"docker" "inspect" "45ba255973e64a7ac6207f6ff633decc3c618b41f5bc8d42f80ba981a34ca768"`
Nov 30 02:40:40.322 INFO running `"docker" "rm" "-f" "45ba255973e64a7ac6207f6ff633decc3c618b41f5bc8d42f80ba981a34ca768"`
Nov 30 02:40:40.520 INFO [stdout] 45ba255973e64a7ac6207f6ff633decc3c618b41f5bc8d42f80ba981a34ca768