[INFO] updating cached repository Fuzen-py/Melody
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Fuzen-py/Melody
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Fuzen-py/Melody" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Fuzen-py/Melody"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Fuzen-py/Melody'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Fuzen-py/Melody" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Fuzen-py/Melody"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Fuzen-py/Melody'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c1fd14def0804585c06c8785f01f49a3d4652274
[INFO] sha for GitHub repo Fuzen-py/Melody: c1fd14def0804585c06c8785f01f49a3d4652274
[INFO] validating manifest of Fuzen-py/Melody on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Fuzen-py/Melody on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Fuzen-py/Melody
[INFO] finished frobbing Fuzen-py/Melody
[INFO] frobbed toml for Fuzen-py/Melody written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Fuzen-py/Melody/Cargo.toml
[INFO] started frobbing Fuzen-py/Melody
[INFO] finished frobbing Fuzen-py/Melody
[INFO] frobbed toml for Fuzen-py/Melody written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/Fuzen-py/Melody/Cargo.toml
[INFO] crate Fuzen-py/Melody already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking Fuzen-py/Melody against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-7/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/Fuzen-py/Melody:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3f995aafaeb3e6941f70ba2a1cd7431aa2370fbbd746cced978d1495de65da3c
[INFO] running `"docker" "start" "-a" "3f995aafaeb3e6941f70ba2a1cd7431aa2370fbbd746cced978d1495de65da3c"`
[INFO] [stderr]     Checking slice-deque v0.1.14
[INFO] [stderr]    Compiling minimp3-sys v0.3.0
[INFO] [stderr]     Checking lewton v0.9.3
[INFO] [stderr]    Compiling syn v0.15.15
[INFO] [stderr]     Checking cgmath v0.14.1
[INFO] [stderr]     Checking os_type v2.2.0
[INFO] [stderr]     Checking console v0.6.2
[INFO] [stderr]     Checking minimp3 v0.3.0
[INFO] [stderr]     Checking indicatif v0.9.0
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]     Checking rodio v0.8.1
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking human-panic v1.0.1
[INFO] [stderr]     Checking melody v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: the item `mp3_metadata` is imported redundantly
[INFO] [stderr]   --> src/song.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         use mp3_metadata;
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/lib.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | extern crate mp3_metadata;
[INFO] [stderr]    | -------------------------- the item `mp3_metadata` is already imported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the item `mp3_metadata` is imported redundantly
[INFO] [stderr]   --> src/song.rs:89:13
[INFO] [stderr]    |
[INFO] [stderr] 89 |         use mp3_metadata;
[INFO] [stderr]    |             ^^^^^^^^^^^^
[INFO] [stderr]    | 
[INFO] [stderr]   ::: src/lib.rs:7:1
[INFO] [stderr]    |
[INFO] [stderr] 7  | extern crate mp3_metadata;
[INFO] [stderr]    | -------------------------- the item `mp3_metadata` is already imported here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/utils.rs:191:13
[INFO] [stderr]     |
[INFO] [stderr] 191 |         let mut tracks = pl.tracks;
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/utils.rs:191:13
[INFO] [stderr]     |
[INFO] [stderr] 191 |         let mut tracks = pl.tracks;
[INFO] [stderr]     |             ----^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> bin/melody/config.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |         ::std::fs::create_dir_all(&config_file).is_ok(); // Result doesnt matter
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::result::Result::<T, E>::is_ok` that must be used
[INFO] [stderr]   --> bin/melody/config.rs:22:9
[INFO] [stderr]    |
[INFO] [stderr] 22 |         ::std::fs::create_dir_all(&config_file).is_ok(); // Result doesnt matter
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you intended to assert that this is ok, consider `.unwrap()` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 50.79s
[INFO] running `"docker" "inspect" "3f995aafaeb3e6941f70ba2a1cd7431aa2370fbbd746cced978d1495de65da3c"`
[INFO] running `"docker" "rm" "-f" "3f995aafaeb3e6941f70ba2a1cd7431aa2370fbbd746cced978d1495de65da3c"`
[INFO] [stdout] 3f995aafaeb3e6941f70ba2a1cd7431aa2370fbbd746cced978d1495de65da3c