Dec 18 05:47:55.294 INFO checking Qwertee/Kopier against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 05:47:55.294 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/Qwertee/Kopier:/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 05:47:55.727 INFO [stdout] 9ce39f0b9c3231abab47cc1d75d791845d445b32163b58c26c71532c880c2399
Dec 18 05:47:55.729 INFO running `"docker" "start" "-a" "9ce39f0b9c3231abab47cc1d75d791845d445b32163b58c26c71532c880c2399"`
Dec 18 05:47:57.616 INFO [stderr]     Checking kopier v0.1.0 (/opt/crater/workdir)
Dec 18 05:47:58.013 INFO [stderr] warning: variable does not need to be mutable
Dec 18 05:47:58.013 INFO [stderr]   --> src/main.rs:22:9
Dec 18 05:47:58.013 INFO [stderr]    |
Dec 18 05:47:58.013 INFO [stderr] 22 |     let mut dest_file = try!(File::create(dest_string));
Dec 18 05:47:58.013 INFO [stderr]    |         ----^^^^^^^^^
Dec 18 05:47:58.013 INFO [stderr]    |         |
Dec 18 05:47:58.013 INFO [stderr]    |         help: remove this `mut`
Dec 18 05:47:58.013 INFO [stderr]    |
Dec 18 05:47:58.013 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 05:47:58.013 INFO [stderr] 
Dec 18 05:47:58.022 INFO [stderr] warning: variable does not need to be mutable
Dec 18 05:47:58.022 INFO [stderr]   --> src/main.rs:22:9
Dec 18 05:47:58.022 INFO [stderr]    |
Dec 18 05:47:58.022 INFO [stderr] 22 |     let mut dest_file = try!(File::create(dest_string));
Dec 18 05:47:58.022 INFO [stderr]    |         ----^^^^^^^^^
Dec 18 05:47:58.022 INFO [stderr]    |         |
Dec 18 05:47:58.022 INFO [stderr]    |         help: remove this `mut`
Dec 18 05:47:58.028 INFO [stderr]    |
Dec 18 05:47:58.028 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 18 05:47:58.028 INFO [stderr] 
Dec 18 05:47:58.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 05:47:58.031 INFO [stderr]   --> src/main.rs:32:5
Dec 18 05:47:58.031 INFO [stderr]    |
Dec 18 05:47:58.031 INFO [stderr] 32 |     f.write_all(data.as_bytes());
Dec 18 05:47:58.031 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:47:58.031 INFO [stderr]    |
Dec 18 05:47:58.031 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 05:47:58.031 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 05:47:58.031 INFO [stderr] 
Dec 18 05:47:58.040 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 05:47:58.040 INFO [stderr]   --> src/main.rs:32:5
Dec 18 05:47:58.040 INFO [stderr]    |
Dec 18 05:47:58.040 INFO [stderr] 32 |     f.write_all(data.as_bytes());
Dec 18 05:47:58.041 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 05:47:58.041 INFO [stderr]    |
Dec 18 05:47:58.041 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 05:47:58.041 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 05:47:58.041 INFO [stderr] 
Dec 18 05:47:58.129 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.53s
Dec 18 05:47:59.064 INFO running `"docker" "inspect" "9ce39f0b9c3231abab47cc1d75d791845d445b32163b58c26c71532c880c2399"`
Dec 18 05:47:59.344 INFO running `"docker" "rm" "-f" "9ce39f0b9c3231abab47cc1d75d791845d445b32163b58c26c71532c880c2399"`
Dec 18 05:47:59.656 INFO [stdout] 9ce39f0b9c3231abab47cc1d75d791845d445b32163b58c26c71532c880c2399