Dec 18 08:28:27.181 INFO checking Axect/Music_Tournament against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 08:28:27.181 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/Axect/Music_Tournament:/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 08:28:27.492 INFO [stdout] 554c0426eee8337918277916c6d3891db5d0e5072410e5ee4e632cb5948b708e
Dec 18 08:28:27.494 INFO running `"docker" "start" "-a" "554c0426eee8337918277916c6d3891db5d0e5072410e5ee4e632cb5948b708e"`
Dec 18 08:28:28.324 INFO [stderr]     Checking Music_Tournament v0.1.0 (/opt/crater/workdir)
Dec 18 08:28:28.596 INFO [stderr] warning: unused import: `std::env`
Dec 18 08:28:28.596 INFO [stderr]  --> src/main.rs:3:5
Dec 18 08:28:28.596 INFO [stderr]   |
Dec 18 08:28:28.596 INFO [stderr] 3 | use std::env;
Dec 18 08:28:28.596 INFO [stderr]   |     ^^^^^^^^
Dec 18 08:28:28.596 INFO [stderr]   |
Dec 18 08:28:28.596 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:28:28.596 INFO [stderr] 
Dec 18 08:28:28.597 INFO [stderr] warning: unused import: `DirEntry`
Dec 18 08:28:28.597 INFO [stderr]  --> src/main.rs:7:21
Dec 18 08:28:28.597 INFO [stderr]   |
Dec 18 08:28:28.597 INFO [stderr] 7 | use std::fs::{self, DirEntry, File};
Dec 18 08:28:28.597 INFO [stderr]   |                     ^^^^^^^^
Dec 18 08:28:28.597 INFO [stderr] 
Dec 18 08:28:28.660 INFO [stderr] warning: unused import: `std::env`
Dec 18 08:28:28.660 INFO [stderr]  --> src/main.rs:3:5
Dec 18 08:28:28.660 INFO [stderr]   |
Dec 18 08:28:28.660 INFO [stderr] 3 | use std::env;
Dec 18 08:28:28.660 INFO [stderr]   |     ^^^^^^^^
Dec 18 08:28:28.660 INFO [stderr]   |
Dec 18 08:28:28.660 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 18 08:28:28.660 INFO [stderr] 
Dec 18 08:28:28.660 INFO [stderr] warning: unused import: `DirEntry`
Dec 18 08:28:28.660 INFO [stderr]  --> src/main.rs:7:21
Dec 18 08:28:28.660 INFO [stderr]   |
Dec 18 08:28:28.660 INFO [stderr] 7 | use std::fs::{self, DirEntry, File};
Dec 18 08:28:28.660 INFO [stderr]   |                     ^^^^^^^^
Dec 18 08:28:28.660 INFO [stderr] 
Dec 18 08:28:28.756 INFO [stderr] warning: crate `Music_Tournament` should have a snake case name such as `music_tournament`
Dec 18 08:28:28.756 INFO [stderr]   |
Dec 18 08:28:28.756 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 18 08:28:28.756 INFO [stderr] 
Dec 18 08:28:28.757 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.757 INFO [stderr]   --> src/main.rs:33:9
Dec 18 08:28:28.757 INFO [stderr]    |
Dec 18 08:28:28.757 INFO [stderr] 33 |         write_mp3_list("save_0.txt", &result);
Dec 18 08:28:28.757 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.757 INFO [stderr]    |
Dec 18 08:28:28.757 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:28:28.757 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.757 INFO [stderr] 
Dec 18 08:28:28.757 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.757 INFO [stderr]   --> src/main.rs:99:13
Dec 18 08:28:28.757 INFO [stderr]    |
Dec 18 08:28:28.757 INFO [stderr] 99 |             write_mp3_list("temp_1.txt", &result2);
Dec 18 08:28:28.757 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.757 INFO [stderr]    |
Dec 18 08:28:28.757 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.757 INFO [stderr] 
Dec 18 08:28:28.757 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.757 INFO [stderr]    --> src/main.rs:101:13
Dec 18 08:28:28.757 INFO [stderr]     |
Dec 18 08:28:28.757 INFO [stderr] 101 |             write_mp3_list("log.txt", &vec![temp_write]);
Dec 18 08:28:28.757 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.757 INFO [stderr]     |
Dec 18 08:28:28.757 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.757 INFO [stderr] 
Dec 18 08:28:28.757 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.757 INFO [stderr]    --> src/main.rs:110:5
Dec 18 08:28:28.757 INFO [stderr]     |
Dec 18 08:28:28.757 INFO [stderr] 110 |     write_mp3_list("save_1.txt", &result2);
Dec 18 08:28:28.757 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.757 INFO [stderr]     |
Dec 18 08:28:28.757 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.757 INFO [stderr] 
Dec 18 08:28:28.803 INFO [stderr] warning: crate `Music_Tournament` should have a snake case name such as `music_tournament`
Dec 18 08:28:28.803 INFO [stderr]   |
Dec 18 08:28:28.804 INFO [stderr]   = note: #[warn(non_snake_case)] on by default
Dec 18 08:28:28.804 INFO [stderr] 
Dec 18 08:28:28.805 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.811 INFO [stderr]   --> src/main.rs:33:9
Dec 18 08:28:28.811 INFO [stderr]    |
Dec 18 08:28:28.811 INFO [stderr] 33 |         write_mp3_list("save_0.txt", &result);
Dec 18 08:28:28.811 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.811 INFO [stderr]    |
Dec 18 08:28:28.811 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 08:28:28.811 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.811 INFO [stderr] 
Dec 18 08:28:28.811 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.811 INFO [stderr]   --> src/main.rs:99:13
Dec 18 08:28:28.811 INFO [stderr]    |
Dec 18 08:28:28.811 INFO [stderr] 99 |             write_mp3_list("temp_1.txt", &result2);
Dec 18 08:28:28.811 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.811 INFO [stderr]    |
Dec 18 08:28:28.811 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.811 INFO [stderr] 
Dec 18 08:28:28.811 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.811 INFO [stderr]    --> src/main.rs:101:13
Dec 18 08:28:28.811 INFO [stderr]     |
Dec 18 08:28:28.811 INFO [stderr] 101 |             write_mp3_list("log.txt", &vec![temp_write]);
Dec 18 08:28:28.811 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.811 INFO [stderr]     |
Dec 18 08:28:28.811 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.811 INFO [stderr] 
Dec 18 08:28:28.811 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 08:28:28.811 INFO [stderr]    --> src/main.rs:110:5
Dec 18 08:28:28.811 INFO [stderr]     |
Dec 18 08:28:28.811 INFO [stderr] 110 |     write_mp3_list("save_1.txt", &result2);
Dec 18 08:28:28.811 INFO [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 08:28:28.811 INFO [stderr]     |
Dec 18 08:28:28.811 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 08:28:28.811 INFO [stderr] 
Dec 18 08:28:28.848 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
Dec 18 08:28:29.437 INFO running `"docker" "inspect" "554c0426eee8337918277916c6d3891db5d0e5072410e5ee4e632cb5948b708e"`
Dec 18 08:28:29.722 INFO running `"docker" "rm" "-f" "554c0426eee8337918277916c6d3891db5d0e5072410e5ee4e632cb5948b708e"`
Dec 18 08:28:29.987 INFO [stdout] 554c0426eee8337918277916c6d3891db5d0e5072410e5ee4e632cb5948b708e