[INFO] updating cached repository wilsoniya/spectralizer-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/wilsoniya/spectralizer-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/wilsoniya/spectralizer-rs" "work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/wilsoniya/spectralizer-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/wilsoniya/spectralizer-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/wilsoniya/spectralizer-rs" "work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/wilsoniya/spectralizer-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/wilsoniya/spectralizer-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 186e75174c2c50b16ac4335854718b3d68eb4412
[INFO] sha for GitHub repo wilsoniya/spectralizer-rs: 186e75174c2c50b16ac4335854718b3d68eb4412
[INFO] validating manifest of wilsoniya/spectralizer-rs on toolchain master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of wilsoniya/spectralizer-rs on toolchain try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing wilsoniya/spectralizer-rs
[INFO] finished frobbing wilsoniya/spectralizer-rs
[INFO] frobbed toml for wilsoniya/spectralizer-rs written to work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/wilsoniya/spectralizer-rs/Cargo.toml
[INFO] started frobbing wilsoniya/spectralizer-rs
[INFO] finished frobbing wilsoniya/spectralizer-rs
[INFO] frobbed toml for wilsoniya/spectralizer-rs written to work/ex/pr-59199/sources/try#68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b/gh/wilsoniya/spectralizer-rs/Cargo.toml
[INFO] crate wilsoniya/spectralizer-rs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/wilsoniya/spectralizer-rs/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/crater-raid/crater/work/local/cargo-home/bin/cargo" "+68fcf881bd1e4dbfc21e22f8c7a56b8a5d8e8f7b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking wilsoniya/spectralizer-rs against master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7 for pr-59199
[INFO] running `"docker" "create" "-v" "/mnt/crater-raid/crater/work/local/target-dirs/pr-59199/worker-3/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7:/opt/crater/target:rw,Z" "-v" "/mnt/crater-raid/crater/work/ex/pr-59199/sources/master#bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7/gh/wilsoniya/spectralizer-rs:/opt/crater/workdir:ro,Z" "-v" "/mnt/crater-raid/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/crater-raid/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" "+bc44841ad2a2ad5f6c5e67b9e35ed8e7e71d4dc7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 3ac802a97e60f8c09d49eefc540796e2f49cc029c731c0f02ae2baa64b23d8a7
[INFO] running `"docker" "start" "-a" "3ac802a97e60f8c09d49eefc540796e2f49cc029c731c0f02ae2baa64b23d8a7"`
[INFO] [stderr]    Compiling sdl2-sys v0.6.2
[INFO] [stderr] warning: redundant linker flag specified for library `SDL2`
[INFO] [stderr] 
[INFO] [stderr]     Checking sdl2 v0.9.1
[INFO] [stderr]     Checking spectralizer-rs v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: type `pa_simple` should have an upper camel case name
[INFO] [stderr]   --> src/pulse.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to upper camel case: `PaSimple`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `pa_sample_spec` should have an upper camel case name
[INFO] [stderr]   --> src/pulse.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | struct pa_sample_spec {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PaSampleSpec`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `sdl2::keyboard::Keycode`
[INFO] [stderr]   --> src/vis.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use sdl2::keyboard::Keycode;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `pa_simple` should have an upper camel case name
[INFO] [stderr]   --> src/pulse.rs:29:8
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    |        ^^^^^^^^^ help: convert the identifier to upper camel case: `PaSimple`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: type `pa_sample_spec` should have an upper camel case name
[INFO] [stderr]   --> src/pulse.rs:38:8
[INFO] [stderr]    |
[INFO] [stderr] 38 | struct pa_sample_spec {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^ help: convert the identifier to upper camel case: `PaSampleSpec`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `sdl2::keyboard::Keycode`
[INFO] [stderr]   --> src/vis.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use sdl2::keyboard::Keycode;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `sample_rate`
[INFO] [stderr]   --> src/pulse.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     sample_rate: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `format`
[INFO] [stderr]   --> src/pulse.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     format: c_int,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rate`
[INFO] [stderr]   --> src/pulse.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     rate: u32,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `channels`
[INFO] [stderr]   --> src/pulse.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     channels: u8
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PA_STREAM_NODIRECTION`
[INFO] [stderr]   --> src/pulse.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | static PA_STREAM_NODIRECTION: c_int = 0_i32;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PA_STREAM_PLAYBACK`
[INFO] [stderr]   --> src/pulse.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | static PA_STREAM_PLAYBACK:    c_int = 1_i32;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PA_STREAM_UPLOAD`
[INFO] [stderr]   --> src/pulse.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | static PA_STREAM_UPLOAD:      c_int = 3_i32;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_sample_spec` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |                      sample_spec: *mut pa_sample_spec,
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(improper_ctypes)] on by default
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | / struct pa_sample_spec {
[INFO] [stderr] 39 | |     format: c_int,
[INFO] [stderr] 40 | |     rate: u32,
[INFO] [stderr] 41 | |     channels: u8
[INFO] [stderr] 42 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_simple` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:19:44
[INFO] [stderr]    |
[INFO] [stderr] 19 |                      error: *mut c_int) -> *mut pa_simple;
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_simple` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:20:27
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn pa_simple_read(pa: *mut pa_simple,
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_simple` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:25:28
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn pa_simple_flush(pa: *mut pa_simple, error: *mut c_int) -> c_int;
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:12:28
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn real_fft(x: &[f64], X: &mut [f64]) {
[INFO] [stderr]    |                            ^ help: convert the identifier to snake case: `x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let N = x.len();
[INFO] [stderr]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Nf` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let Nf = N as f64 - 1.0;
[INFO] [stderr]    |         ^^ help: convert the identifier to snake case: `nf`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let N = x.len();
[INFO] [stderr]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Nf` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let Nf = N as f64;
[INFO] [stderr]    |         ^^ help: convert the identifier to snake case: `nf`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut X: Vec<Complex<f64>> = vec![Complex::new(0.0, 0.0); N];
[INFO] [stderr]    |             ^ help: convert the identifier to snake case: `x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X_even` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let X_even = ditfft2(&evens[..]);
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `x_even`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X_odd` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |         let X_odd = ditfft2(&odds[..]);
[INFO] [stderr]    |             ^^^^^ help: convert the identifier to snake case: `x_odd`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `sample_rate`
[INFO] [stderr]   --> src/pulse.rs:34:5
[INFO] [stderr]    |
[INFO] [stderr] 34 |     sample_rate: usize,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `format`
[INFO] [stderr]   --> src/pulse.rs:39:5
[INFO] [stderr]    |
[INFO] [stderr] 39 |     format: c_int,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `rate`
[INFO] [stderr]   --> src/pulse.rs:40:5
[INFO] [stderr]    |
[INFO] [stderr] 40 |     rate: u32,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `channels`
[INFO] [stderr]   --> src/pulse.rs:41:5
[INFO] [stderr]    |
[INFO] [stderr] 41 |     channels: u8
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PA_STREAM_NODIRECTION`
[INFO] [stderr]   --> src/pulse.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | static PA_STREAM_NODIRECTION: c_int = 0_i32;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PA_STREAM_PLAYBACK`
[INFO] [stderr]   --> src/pulse.rs:49:1
[INFO] [stderr]    |
[INFO] [stderr] 49 | static PA_STREAM_PLAYBACK:    c_int = 1_i32;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: static item is never used: `PA_STREAM_UPLOAD`
[INFO] [stderr]   --> src/pulse.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | static PA_STREAM_UPLOAD:      c_int = 3_i32;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_sample_spec` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:16:35
[INFO] [stderr]    |
[INFO] [stderr] 16 |                      sample_spec: *mut pa_sample_spec,
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(improper_ctypes)] on by default
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | / struct pa_sample_spec {
[INFO] [stderr] 39 | |     format: c_int,
[INFO] [stderr] 40 | |     rate: u32,
[INFO] [stderr] 41 | |     channels: u8
[INFO] [stderr] 42 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_simple` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:19:44
[INFO] [stderr]    |
[INFO] [stderr] 19 |                      error: *mut c_int) -> *mut pa_simple;
[INFO] [stderr]    |                                            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_simple` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:20:27
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn pa_simple_read(pa: *mut pa_simple,
[INFO] [stderr]    |                           ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `extern` block uses type `pulse::pa_simple` which is not FFI-safe: this struct has unspecified layout
[INFO] [stderr]   --> src/pulse.rs:25:28
[INFO] [stderr]    |
[INFO] [stderr] 25 |     fn pa_simple_flush(pa: *mut pa_simple, error: *mut c_int) -> c_int;
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider adding a #[repr(C)] or #[repr(transparent)] attribute to this struct
[INFO] [stderr] note: type defined here
[INFO] [stderr]   --> src/pulse.rs:29:1
[INFO] [stderr]    |
[INFO] [stderr] 29 | struct pa_simple;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:12:28
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn real_fft(x: &[f64], X: &mut [f64]) {
[INFO] [stderr]    |                            ^ help: convert the identifier to snake case: `x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let N = x.len();
[INFO] [stderr]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Nf` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:28:9
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let Nf = N as f64 - 1.0;
[INFO] [stderr]    |         ^^ help: convert the identifier to snake case: `nf`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:54:9
[INFO] [stderr]    |
[INFO] [stderr] 54 |     let N = x.len();
[INFO] [stderr]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `Nf` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let Nf = N as f64;
[INFO] [stderr]    |         ^^ help: convert the identifier to snake case: `nf`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:56:13
[INFO] [stderr]    |
[INFO] [stderr] 56 |     let mut X: Vec<Complex<f64>> = vec![Complex::new(0.0, 0.0); N];
[INFO] [stderr]    |             ^ help: convert the identifier to snake case: `x`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X_even` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:73:13
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let X_even = ditfft2(&evens[..]);
[INFO] [stderr]    |             ^^^^^^ help: convert the identifier to snake case: `x_even`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `X_odd` should have a snake case name
[INFO] [stderr]   --> src/fft.rs:74:13
[INFO] [stderr]    |
[INFO] [stderr] 74 |         let X_odd = ditfft2(&odds[..]);
[INFO] [stderr]    |             ^^^^^ help: convert the identifier to snake case: `x_odd`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.16s
[INFO] running `"docker" "inspect" "3ac802a97e60f8c09d49eefc540796e2f49cc029c731c0f02ae2baa64b23d8a7"`
[INFO] running `"docker" "rm" "-f" "3ac802a97e60f8c09d49eefc540796e2f49cc029c731c0f02ae2baa64b23d8a7"`
[INFO] [stdout] 3ac802a97e60f8c09d49eefc540796e2f49cc029c731c0f02ae2baa64b23d8a7