Dec 17 23:57:52.638 INFO checking gannonchan/var_study against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 23:57:52.638 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-0/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/gannonchan/var_study:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:57:53.282 INFO [stdout] 8653a0bad2c12574d3b64a93170f20894e3d7e91b8714680e11f581d057a79a7
Dec 17 23:57:53.284 INFO running `"docker" "start" "-a" "8653a0bad2c12574d3b64a93170f20894e3d7e91b8714680e11f581d057a79a7"`
Dec 17 23:57:55.440 INFO [stderr]     Checking var_study v0.1.0 (/opt/crater/workdir)
Dec 17 23:57:55.942 INFO [stderr] warning: unused variable: `first_name`
Dec 17 23:57:55.942 INFO [stderr]   --> src/main.rs:23:9
Dec 17 23:57:55.942 INFO [stderr]    |
Dec 17 23:57:55.942 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 17 23:57:55.942 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 17 23:57:55.942 INFO [stderr]    |
Dec 17 23:57:55.942 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 23:57:55.942 INFO [stderr] 
Dec 17 23:57:55.942 INFO [stderr] warning: unused variable: `last_name`
Dec 17 23:57:55.942 INFO [stderr]   --> src/main.rs:24:9
Dec 17 23:57:55.942 INFO [stderr]    |
Dec 17 23:57:55.942 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 17 23:57:55.942 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 17 23:57:55.942 INFO [stderr] 
Dec 17 23:57:55.942 INFO [stderr] warning: unused variable: `f`
Dec 17 23:57:55.942 INFO [stderr]   --> src/main.rs:73:9
Dec 17 23:57:55.942 INFO [stderr]    |
Dec 17 23:57:55.943 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 17 23:57:55.943 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 17 23:57:55.943 INFO [stderr] 
Dec 17 23:57:55.943 INFO [stderr] warning: unused variable: `f`
Dec 17 23:57:55.943 INFO [stderr]   --> src/main.rs:95:9
Dec 17 23:57:55.943 INFO [stderr]    |
Dec 17 23:57:55.943 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 17 23:57:55.943 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 17 23:57:55.943 INFO [stderr] 
Dec 17 23:57:55.943 INFO [stderr] warning: unused variable: `f`
Dec 17 23:57:55.943 INFO [stderr]   --> src/main.rs:97:9
Dec 17 23:57:55.943 INFO [stderr]    |
Dec 17 23:57:55.943 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 17 23:57:55.943 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 17 23:57:55.943 INFO [stderr] 
Dec 17 23:57:56.064 INFO [stderr] warning: unused variable: `first_name`
Dec 17 23:57:56.064 INFO [stderr]   --> src/main.rs:23:9
Dec 17 23:57:56.064 INFO [stderr]    |
Dec 17 23:57:56.064 INFO [stderr] 23 |     let first_name = String::from("0");
Dec 17 23:57:56.064 INFO [stderr]    |         ^^^^^^^^^^ help: consider using `_first_name` instead
Dec 17 23:57:56.064 INFO [stderr]    |
Dec 17 23:57:56.064 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 23:57:56.064 INFO [stderr] 
Dec 17 23:57:56.064 INFO [stderr] warning: unused variable: `last_name`
Dec 17 23:57:56.064 INFO [stderr]   --> src/main.rs:24:9
Dec 17 23:57:56.064 INFO [stderr]    |
Dec 17 23:57:56.064 INFO [stderr] 24 |     let last_name = String::from("张三");
Dec 17 23:57:56.064 INFO [stderr]    |         ^^^^^^^^^ help: consider using `_last_name` instead
Dec 17 23:57:56.064 INFO [stderr] 
Dec 17 23:57:56.064 INFO [stderr] warning: unused variable: `f`
Dec 17 23:57:56.064 INFO [stderr]   --> src/main.rs:73:9
Dec 17 23:57:56.064 INFO [stderr]    |
Dec 17 23:57:56.064 INFO [stderr] 73 |     let f = match f {   //使用match判断打开文件是否出现错误
Dec 17 23:57:56.064 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 17 23:57:56.064 INFO [stderr] 
Dec 17 23:57:56.064 INFO [stderr] warning: unused variable: `f`
Dec 17 23:57:56.064 INFO [stderr]   --> src/main.rs:95:9
Dec 17 23:57:56.065 INFO [stderr]    |
Dec 17 23:57:56.065 INFO [stderr] 95 |     let f = File::open("d:\\hello.txt").unwrap();
Dec 17 23:57:56.065 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 17 23:57:56.065 INFO [stderr] 
Dec 17 23:57:56.065 INFO [stderr] warning: unused variable: `f`
Dec 17 23:57:56.065 INFO [stderr]   --> src/main.rs:97:9
Dec 17 23:57:56.065 INFO [stderr]    |
Dec 17 23:57:56.065 INFO [stderr] 97 |     let f = File::open("d:\\hello.txt").expect("打开文件发生错误！");
Dec 17 23:57:56.065 INFO [stderr]    |         ^ help: consider using `_f` instead
Dec 17 23:57:56.065 INFO [stderr] 
Dec 17 23:57:56.143 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.72s
Dec 17 23:57:57.360 INFO running `"docker" "inspect" "8653a0bad2c12574d3b64a93170f20894e3d7e91b8714680e11f581d057a79a7"`
Dec 17 23:57:57.650 INFO running `"docker" "rm" "-f" "8653a0bad2c12574d3b64a93170f20894e3d7e91b8714680e11f581d057a79a7"`
Dec 17 23:57:57.940 INFO [stdout] 8653a0bad2c12574d3b64a93170f20894e3d7e91b8714680e11f581d057a79a7