[INFO] cloning repository https://github.com/ThatsGobbles/fft-analyzer
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ThatsGobbles/fft-analyzer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffft-analyzer"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffft-analyzer'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0f40b95b65090705a551f421d40e509e9476e243
[INFO] checking ThatsGobbles/fft-analyzer against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffft-analyzer" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThatsGobbles/fft-analyzer on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ThatsGobbles/fft-analyzer
[INFO] finished tweaking git repo https://github.com/ThatsGobbles/fft-analyzer
[INFO] tweaked toml for git repo https://github.com/ThatsGobbles/fft-analyzer written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/ThatsGobbles/fft-analyzer already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 7507d8f99c7f82b670886a4278fec1579086d890d970582e70ecd3da501e60d8
[INFO] running `"docker" "start" "-a" "7507d8f99c7f82b670886a4278fec1579086d890d970582e70ecd3da501e60d8"`
[INFO] [stderr]     Checking fft-analyzer v0.1.0 (/opt/rustwide/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 1.31s
[INFO] running `"docker" "inspect" "7507d8f99c7f82b670886a4278fec1579086d890d970582e70ecd3da501e60d8"`
[INFO] running `"docker" "rm" "-f" "7507d8f99c7f82b670886a4278fec1579086d890d970582e70ecd3da501e60d8"`
[INFO] [stdout] 7507d8f99c7f82b670886a4278fec1579086d890d970582e70ecd3da501e60d8