[INFO] cloning repository https://github.com/ThatsGobbles/fft-analyzer
[INFO] running `Command { std: "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", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffft-analyzer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0f40b95b65090705a551f421d40e509e9476e243
[INFO] checking ThatsGobbles/fft-analyzer against try#6f12b8fe67b4eed2e838dab803ed9493b9d62c0f for pr-79073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FThatsGobbles%2Ffft-analyzer" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ThatsGobbles/fft-analyzer on toolchain 6f12b8fe67b4eed2e838dab803ed9493b9d62c0f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-7/source/Cargo.toml
[INFO] crate git repo https://github.com/ThatsGobbles/fft-analyzer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustfft v3.0.0
[INFO] [stderr]   Downloaded strength_reduce v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d4d7f8acb0e774618862767cc132e0ad182f0fc411560bb342e7f72a679f5cd2
[INFO] running `Command { std: "docker" "start" "-a" "d4d7f8acb0e774618862767cc132e0ad182f0fc411560bb342e7f72a679f5cd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d4d7f8acb0e774618862767cc132e0ad182f0fc411560bb342e7f72a679f5cd2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4d7f8acb0e774618862767cc132e0ad182f0fc411560bb342e7f72a679f5cd2", kill_on_drop: false }`
[INFO] [stdout] d4d7f8acb0e774618862767cc132e0ad182f0fc411560bb342e7f72a679f5cd2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "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" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+6f12b8fe67b4eed2e838dab803ed9493b9d62c0f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b1448aa6658ac4c9c904292e7b014f826af88f8a3dd51ea284756a30c41b1673
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b1448aa6658ac4c9c904292e7b014f826af88f8a3dd51ea284756a30c41b1673", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.4
[INFO] [stderr]     Checking transpose v0.1.0
[INFO] [stderr]     Checking strength_reduce v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.8
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]     Checking rustfft v3.0.0
[INFO] [stderr]     Checking fft-analyzer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `endpoints`
[INFO] [stdout]    --> src/main.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 181 |     let endpoints =
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_endpoints`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_bands`
[INFO] [stdout]    --> src/main.rs:269:53
[INFO] [stdout]     |
[INFO] [stdout] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stdout]     |                                                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_bands`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `locate_band_for_freq`
[INFO] [stdout]    --> src/main.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn locate_band_for_freq(target_freq: u32, band_intervals: &[f32]) -> Option<usize> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `separate_freq_bands`
[INFO] [stdout]    --> src/main.rs:269:4
[INFO] [stdout]     |
[INFO] [stdout] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `endpoints`
[INFO] [stdout]    --> src/main.rs:181:9
[INFO] [stdout]     |
[INFO] [stdout] 181 |     let endpoints =
[INFO] [stdout]     |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_endpoints`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `num_bands`
[INFO] [stdout]    --> src/main.rs:269:53
[INFO] [stdout]     |
[INFO] [stdout] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stdout]     |                                                     ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_num_bands`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `locate_band_for_freq`
[INFO] [stdout]    --> src/main.rs:137:4
[INFO] [stdout]     |
[INFO] [stdout] 137 | fn locate_band_for_freq(target_freq: u32, band_intervals: &[f32]) -> Option<usize> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `separate_freq_bands`
[INFO] [stdout]    --> src/main.rs:269:4
[INFO] [stdout]     |
[INFO] [stdout] 269 | fn separate_freq_bands(fft_output: &[Complex<f32>], num_bands: usize, output_buffer: &mut [f32]) -> Result<(), &'static str> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.90s
[INFO] running `Command { std: "docker" "inspect" "b1448aa6658ac4c9c904292e7b014f826af88f8a3dd51ea284756a30c41b1673", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b1448aa6658ac4c9c904292e7b014f826af88f8a3dd51ea284756a30c41b1673", kill_on_drop: false }`
[INFO] [stdout] b1448aa6658ac4c9c904292e7b014f826af88f8a3dd51ea284756a30c41b1673