[INFO] updating cached repository stevebob/hello-cpal
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/stevebob/hello-cpal
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/stevebob/hello-cpal" "work/ex/clippy-test-run/sources/stable/gh/stevebob/hello-cpal"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/stevebob/hello-cpal'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/stevebob/hello-cpal" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/stevebob/hello-cpal"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/stevebob/hello-cpal'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d7025a8778223566609c5e49021ec68c2d8b8a7e
[INFO] sha for GitHub repo stevebob/hello-cpal: d7025a8778223566609c5e49021ec68c2d8b8a7e
[INFO] validating manifest of stevebob/hello-cpal 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 stevebob/hello-cpal 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 stevebob/hello-cpal
[INFO] finished frobbing stevebob/hello-cpal
[INFO] frobbed toml for stevebob/hello-cpal written to work/ex/clippy-test-run/sources/stable/gh/stevebob/hello-cpal/Cargo.toml
[INFO] started frobbing stevebob/hello-cpal
[INFO] finished frobbing stevebob/hello-cpal
[INFO] frobbed toml for stevebob/hello-cpal written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/stevebob/hello-cpal/Cargo.toml
[INFO] crate stevebob/hello-cpal 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 stevebob/hello-cpal against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-2/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/stevebob/hello-cpal:/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] 8ad13ba6b71930305f8466a9d4862104ccfe5c97f2958c6506e1eb99665538d8
[INFO] running `"docker" "start" "-a" "8ad13ba6b71930305f8466a9d4862104ccfe5c97f2958c6506e1eb99665538d8"`
[INFO] [stderr]     Checking getopts v0.2.18
[INFO] [stderr]     Checking alsa-sys v0.1.2
[INFO] [stderr]     Checking cpal v0.8.2
[INFO] [stderr]     Checking simon v0.1.0
[INFO] [stderr]     Checking hello-cpal v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:22:68
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let index_multiplier = freq_hz * ::std::f64::consts::PI * 2. / (samples_per_second as f64);
[INFO] [stderr]    |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(samples_per_second)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i16 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:24:59
[INFO] [stderr]    |
[INFO] [stderr] 24 |         ((sample_index as f64 * index_multiplier).sin() * (::std::i16::MAX as f64)) as i16
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(::std::i16::MAX)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/main.rs:28:51
[INFO] [stderr]    |
[INFO] [stderr] 28 |       event_loop.run(move |_stream_id, stream_data| match stream_data {
[INFO] [stderr]    |  ___________________________________________________^
[INFO] [stderr] 29 | |         cpal::StreamData::Output {
[INFO] [stderr] 30 | |             buffer: cpal::UnknownTypeOutputBuffer::I16(mut buffer),
[INFO] [stderr] 31 | |         } => for elem in buffer.iter_mut() {
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |         _ => (),
[INFO] [stderr] 36 | |     });
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 28 |     event_loop.run(move |_stream_id, stream_data| if let cpal::StreamData::Output {
[INFO] [stderr] 29 |             buffer: cpal::UnknownTypeOutputBuffer::I16(mut buffer),
[INFO] [stderr] 30 |         } = stream_data for elem in buffer.iter_mut() {
[INFO] [stderr] 31 |     *elem = sample_index_to_sample(sample_index);
[INFO] [stderr] 32 |     sample_index += 1;
[INFO] [stderr] 33 | });
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: casting u32 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:22:68
[INFO] [stderr]    |
[INFO] [stderr] 22 |     let index_multiplier = freq_hz * ::std::f64::consts::PI * 2. / (samples_per_second as f64);
[INFO] [stderr]    |                                                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(samples_per_second)`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::cast_lossless)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: casting i16 to f64 may become silently lossy if types change
[INFO] [stderr]   --> src/main.rs:24:59
[INFO] [stderr]    |
[INFO] [stderr] 24 |         ((sample_index as f64 * index_multiplier).sin() * (::std::i16::MAX as f64)) as i16
[INFO] [stderr]    |                                                           ^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `f64::from(::std::i16::MAX)`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
[INFO] [stderr] 
[INFO] [stderr] warning: you seem to be trying to use match for destructuring a single pattern. Consider using `if let`
[INFO] [stderr]   --> src/main.rs:28:51
[INFO] [stderr]    |
[INFO] [stderr] 28 |       event_loop.run(move |_stream_id, stream_data| match stream_data {
[INFO] [stderr]    |  ___________________________________________________^
[INFO] [stderr] 29 | |         cpal::StreamData::Output {
[INFO] [stderr] 30 | |             buffer: cpal::UnknownTypeOutputBuffer::I16(mut buffer),
[INFO] [stderr] 31 | |         } => for elem in buffer.iter_mut() {
[INFO] [stderr] ...  |
[INFO] [stderr] 35 | |         _ => (),
[INFO] [stderr] 36 | |     });
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::single_match)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#single_match
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 28 |     event_loop.run(move |_stream_id, stream_data| if let cpal::StreamData::Output {
[INFO] [stderr] 29 |             buffer: cpal::UnknownTypeOutputBuffer::I16(mut buffer),
[INFO] [stderr] 30 |         } = stream_data for elem in buffer.iter_mut() {
[INFO] [stderr] 31 |     *elem = sample_index_to_sample(sample_index);
[INFO] [stderr] 32 |     sample_index += 1;
[INFO] [stderr] 33 | });
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.52s
[INFO] running `"docker" "inspect" "8ad13ba6b71930305f8466a9d4862104ccfe5c97f2958c6506e1eb99665538d8"`
[INFO] running `"docker" "rm" "-f" "8ad13ba6b71930305f8466a9d4862104ccfe5c97f2958c6506e1eb99665538d8"`
[INFO] [stdout] 8ad13ba6b71930305f8466a9d4862104ccfe5c97f2958c6506e1eb99665538d8