[INFO] updating cached repository AntonHermann/volume-control
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/AntonHermann/volume-control
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/AntonHermann/volume-control" "work/ex/clippy-test-run/sources/stable/gh/AntonHermann/volume-control"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/AntonHermann/volume-control'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/AntonHermann/volume-control" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/AntonHermann/volume-control"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/AntonHermann/volume-control'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4f4e4adb0f6b9f0acf6de9ad38635d350303df7c
[INFO] sha for GitHub repo AntonHermann/volume-control: 4f4e4adb0f6b9f0acf6de9ad38635d350303df7c
[INFO] validating manifest of AntonHermann/volume-control on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of AntonHermann/volume-control on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing AntonHermann/volume-control
[INFO] finished frobbing AntonHermann/volume-control
[INFO] frobbed toml for AntonHermann/volume-control written to work/ex/clippy-test-run/sources/stable/gh/AntonHermann/volume-control/Cargo.toml
[INFO] started frobbing AntonHermann/volume-control
[INFO] finished frobbing AntonHermann/volume-control
[INFO] frobbed toml for AntonHermann/volume-control written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/AntonHermann/volume-control/Cargo.toml
[INFO] crate AntonHermann/volume-control has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting AntonHermann/volume-control against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/AntonHermann/volume-control:/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c6f2155b551d964a332370d6af3d91a2be82149db0a6a298c398ecc3eb45620b
[INFO] running `"docker" "start" "-a" "c6f2155b551d964a332370d6af3d91a2be82149db0a6a298c398ecc3eb45620b"`
[INFO] [stderr]     Checking volume-control v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: redundant pattern matching, consider using `is_ok()`
[INFO] [stderr]   --> src/main.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 |           if let Ok(_) = monitor.read(&mut buffer) {
[INFO] [stderr]    |  _________-      ^^^^^
[INFO] [stderr] 28 | |             print_sound_info(name)?;
[INFO] [stderr] 29 | |         }
[INFO] [stderr]    | |_________- help: try this: `if monitor.read(&mut buffer).is_ok()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr] warning: redundant pattern matching, consider using `is_ok()`
[INFO] [stderr]   --> src/main.rs:27:16
[INFO] [stderr]    |
[INFO] [stderr] 27 |           if let Ok(_) = monitor.read(&mut buffer) {
[INFO] [stderr]    |  _________-      ^^^^^
[INFO] [stderr] 28 | |             print_sound_info(name)?;
[INFO] [stderr] 29 | |         }
[INFO] [stderr]    | |_________- help: try this: `if monitor.read(&mut buffer).is_ok()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::redundant_pattern_matching)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_pattern_matching
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `"docker" "inspect" "c6f2155b551d964a332370d6af3d91a2be82149db0a6a298c398ecc3eb45620b"`
[INFO] running `"docker" "rm" "-f" "c6f2155b551d964a332370d6af3d91a2be82149db0a6a298c398ecc3eb45620b"`
[INFO] [stdout] c6f2155b551d964a332370d6af3d91a2be82149db0a6a298c398ecc3eb45620b