[INFO] updating cached repository ThatsGobbles/fft-analyzer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/ThatsGobbles/fft-analyzer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/ThatsGobbles/fft-analyzer" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ThatsGobbles/fft-analyzer"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ThatsGobbles/fft-analyzer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/ThatsGobbles/fft-analyzer" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/ThatsGobbles/fft-analyzer"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/ThatsGobbles/fft-analyzer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0f40b95b65090705a551f421d40e509e9476e243
[INFO] sha for GitHub repo ThatsGobbles/fft-analyzer: 0f40b95b65090705a551f421d40e509e9476e243
[INFO] validating manifest of ThatsGobbles/fft-analyzer 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 ThatsGobbles/fft-analyzer 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 ThatsGobbles/fft-analyzer
[INFO] finished frobbing ThatsGobbles/fft-analyzer
[INFO] frobbed toml for ThatsGobbles/fft-analyzer written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ThatsGobbles/fft-analyzer/Cargo.toml
[INFO] started frobbing ThatsGobbles/fft-analyzer
[INFO] finished frobbing ThatsGobbles/fft-analyzer
[INFO] frobbed toml for ThatsGobbles/fft-analyzer written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/ThatsGobbles/fft-analyzer/Cargo.toml
[INFO] crate ThatsGobbles/fft-analyzer 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 ThatsGobbles/fft-analyzer against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-5/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/ThatsGobbles/fft-analyzer:/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] ef530c16c83a9d1634c7dbe491de6b64ef9cf29a848cbe0ad8f9b22d5fd449ea
[INFO] running `"docker" "start" "-a" "ef530c16c83a9d1634c7dbe491de6b64ef9cf29a848cbe0ad8f9b22d5fd449ea"`
[INFO] [stderr]     Checking strength_reduce v0.2.2
[INFO] [stderr]     Checking transpose v0.1.0
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]     Checking rustfft v3.0.0
[INFO] [stderr]     Checking fft-analyzer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `endpoints`
[INFO] [stderr]    --> src/main.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     let endpoints =
[INFO] [stderr]     |         ^^^^^^^^^ help: consider prefixing with an underscore: `_endpoints`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_bands`
[INFO] [stderr]    --> src/main.rs:269:53
[INFO] [stderr]     |
[INFO] [stderr] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stderr]     |                                                     ^^^^^^^^^ help: consider prefixing with an underscore: `_num_bands`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `locate_band_for_freq`
[INFO] [stderr]    --> src/main.rs:137:1
[INFO] [stderr]     |
[INFO] [stderr] 137 | fn locate_band_for_freq(target_freq: u32, band_intervals: &[f32]) -> Option<usize> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `separate_freq_bands`
[INFO] [stderr]    --> src/main.rs:269:1
[INFO] [stderr]     |
[INFO] [stderr] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `endpoints`
[INFO] [stderr]    --> src/main.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     let endpoints =
[INFO] [stderr]     |         ^^^^^^^^^ help: consider prefixing with an underscore: `_endpoints`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `num_bands`
[INFO] [stderr]    --> src/main.rs:269:53
[INFO] [stderr]     |
[INFO] [stderr] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stderr]     |                                                     ^^^^^^^^^ help: consider prefixing with an underscore: `_num_bands`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `locate_band_for_freq`
[INFO] [stderr]    --> src/main.rs:137:1
[INFO] [stderr]     |
[INFO] [stderr] 137 | fn locate_band_for_freq(target_freq: u32, band_intervals: &[f32]) -> Option<usize> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `separate_freq_bands`
[INFO] [stderr]    --> src/main.rs:269:1
[INFO] [stderr]     |
[INFO] [stderr] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.19s
[INFO] running `"docker" "inspect" "ef530c16c83a9d1634c7dbe491de6b64ef9cf29a848cbe0ad8f9b22d5fd449ea"`
[INFO] running `"docker" "rm" "-f" "ef530c16c83a9d1634c7dbe491de6b64ef9cf29a848cbe0ad8f9b22d5fd449ea"`
[INFO] [stdout] ef530c16c83a9d1634c7dbe491de6b64ef9cf29a848cbe0ad8f9b22d5fd449ea