[INFO] cloning repository https://github.com/kasper0406/fft
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kasper0406/fft" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkasper0406%2Ffft", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkasper0406%2Ffft'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c4a005944d366ac7b7623f05625f64a89bdc7bdd
[INFO] testing kasper0406/fft against beta-2020-10-09 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkasper0406%2Ffft" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kasper0406/fft on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kasper0406/fft
[INFO] finished tweaking git repo https://github.com/kasper0406/fft
[INFO] tweaked toml for git repo https://github.com/kasper0406/fft written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/kasper0406/fft already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded gnuplot v0.0.31
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 69af529b7e33732b397e07a7a4feeebbbb05066b339a1a69af832b76aee47b02
[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" "69af529b7e33732b397e07a7a4feeebbbb05066b339a1a69af832b76aee47b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "69af529b7e33732b397e07a7a4feeebbbb05066b339a1a69af832b76aee47b02", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69af529b7e33732b397e07a7a4feeebbbb05066b339a1a69af832b76aee47b02", kill_on_drop: false }`
[INFO] [stdout] 69af529b7e33732b397e07a7a4feeebbbb05066b339a1a69af832b76aee47b02
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 066bbcf8846cba8065212beaec7e42464366cfec9a4f3d677e16787bbcb7acbe
[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" "066bbcf8846cba8065212beaec7e42464366cfec9a4f3d677e16787bbcb7acbe", kill_on_drop: false }`
[INFO] [stderr]    Compiling fft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `axes`
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_axes`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `axes`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_axes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     for i in 0..100 {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `time`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     time: f64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_samples`
[INFO] [stdout]   --> src/main.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn render_samples(samples: &[Sample]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_dft_coefficients`
[INFO] [stdout]   --> src/main.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn render_dft_coefficients(interval: f64, coefficients: &[Complex<f64>]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `naive_dft`
[INFO] [stdout]   --> src/main.rs:76:4
[INFO] [stdout]    |
[INFO] [stdout] 76 | fn naive_dft(samples: &[Sample]) -> Vec<Complex<f64>> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `recursive_fft`
[INFO] [stdout]    --> src/main.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn recursive_fft(samples: &[Sample]) -> Vec<Complex<f64>> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `validate_coefficients`
[INFO] [stdout]    --> src/main.rs:222:4
[INFO] [stdout]     |
[INFO] [stdout] 222 | fn validate_coefficients(actual: &[Complex<f64>], expected: &[Complex<f64>]) {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let N = coefficients.len() / 2;
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let N = samples.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let N = samples.len();
[INFO] [stdout]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:136:25
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn generate_permutation(N: usize) -> Vec<usize> {
[INFO] [stdout]     |                         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let N = samples.len();
[INFO] [stdout]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.20s
[INFO] running `Command { std: "docker" "inspect" "066bbcf8846cba8065212beaec7e42464366cfec9a4f3d677e16787bbcb7acbe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "066bbcf8846cba8065212beaec7e42464366cfec9a4f3d677e16787bbcb7acbe", kill_on_drop: false }`
[INFO] [stdout] 066bbcf8846cba8065212beaec7e42464366cfec9a4f3d677e16787bbcb7acbe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 72d13b34dc9cb42fa2dcd3ac7cc02c8b40236509cc00eacd2044a03b333ca746
[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" "72d13b34dc9cb42fa2dcd3ac7cc02c8b40236509cc00eacd2044a03b333ca746", kill_on_drop: false }`
[INFO] [stderr]    Compiling fft v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `axes`
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_axes`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `axes`
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_axes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:315:9
[INFO] [stdout]     |
[INFO] [stdout] 315 |     for i in 0..100 {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 52 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:67:9
[INFO] [stdout]    |
[INFO] [stdout] 67 |     let mut axes = figure.axes2d()
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `time`
[INFO] [stdout]   --> src/main.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 |     time: f64,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_samples`
[INFO] [stdout]   --> src/main.rs:47:4
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn render_samples(samples: &[Sample]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_dft_coefficients`
[INFO] [stdout]   --> src/main.rs:61:4
[INFO] [stdout]    |
[INFO] [stdout] 61 | fn render_dft_coefficients(interval: f64, coefficients: &[Complex<f64>]) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:62:9
[INFO] [stdout]    |
[INFO] [stdout] 62 |     let N = coefficients.len() / 2;
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]   --> src/main.rs:81:9
[INFO] [stdout]    |
[INFO] [stdout] 81 |     let N = samples.len();
[INFO] [stdout]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let N = samples.len();
[INFO] [stdout]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:136:25
[INFO] [stdout]     |
[INFO] [stdout] 136 | fn generate_permutation(N: usize) -> Vec<usize> {
[INFO] [stdout]     |                         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `N` should have a snake case name
[INFO] [stdout]    --> src/main.rs:176:9
[INFO] [stdout]     |
[INFO] [stdout] 176 |     let N = samples.len();
[INFO] [stdout]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 13 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.02s
[INFO] running `Command { std: "docker" "inspect" "72d13b34dc9cb42fa2dcd3ac7cc02c8b40236509cc00eacd2044a03b333ca746", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "72d13b34dc9cb42fa2dcd3ac7cc02c8b40236509cc00eacd2044a03b333ca746", kill_on_drop: false }`
[INFO] [stdout] 72d13b34dc9cb42fa2dcd3ac7cc02c8b40236509cc00eacd2044a03b333ca746
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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=warn" "-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:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] b2a5a35b90effa85f1317c6e092808fecff0185d3b2bde43ca31e4caa940a4be
[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" "b2a5a35b90effa85f1317c6e092808fecff0185d3b2bde43ca31e4caa940a4be", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `axes`
[INFO] [stderr]   --> src/main.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut axes = figure.axes2d()
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_axes`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `axes`
[INFO] [stderr]   --> src/main.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let mut axes = figure.axes2d()
[INFO] [stderr]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_axes`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/main.rs:315:9
[INFO] [stderr]     |
[INFO] [stderr] 315 |     for i in 0..100 {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:52:9
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut axes = figure.axes2d()
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:67:9
[INFO] [stderr]    |
[INFO] [stderr] 67 |     let mut axes = figure.axes2d()
[INFO] [stderr]    |         ----^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `time`
[INFO] [stderr]   --> src/main.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     time: f64,
[INFO] [stderr]    |     ^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render_samples`
[INFO] [stderr]   --> src/main.rs:47:4
[INFO] [stderr]    |
[INFO] [stderr] 47 | fn render_samples(samples: &[Sample]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render_dft_coefficients`
[INFO] [stderr]   --> src/main.rs:61:4
[INFO] [stderr]    |
[INFO] [stderr] 61 | fn render_dft_coefficients(interval: f64, coefficients: &[Complex<f64>]) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]   --> src/main.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let N = coefficients.len() / 2;
[INFO] [stderr]    |         ^ help: convert the identifier to snake case: `n`
[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/main.rs:81:9
[INFO] [stderr]    |
[INFO] [stderr] 81 |     let N = samples.len();
[INFO] [stderr]    |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]    --> src/main.rs:102:9
[INFO] [stderr]     |
[INFO] [stderr] 102 |     let N = samples.len();
[INFO] [stderr]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]    --> src/main.rs:136:25
[INFO] [stderr]     |
[INFO] [stderr] 136 | fn generate_permutation(N: usize) -> Vec<usize> {
[INFO] [stderr]     |                         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `N` should have a snake case name
[INFO] [stderr]    --> src/main.rs:176:9
[INFO] [stderr]     |
[INFO] [stderr] 176 |     let N = samples.len();
[INFO] [stderr]     |         ^ help: convert the identifier to snake case: `n`
[INFO] [stderr] 
[INFO] [stderr] warning: 13 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/fft-12a3962b5709826f
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_recursive_odd_size_fft ... FAILED
[INFO] [stdout] test test_recursive_fft ... ok
[INFO] [stderr] error: test failed, to rerun pass '--bin fft'
[INFO] [stdout] test test_iterative_fft ... ok
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout] 
[INFO] [stdout] ---- test_recursive_odd_size_fft stdout ----
[INFO] [stdout] Test with sample rate: 7
[INFO] [stdout] thread 'test_recursive_odd_size_fft' panicked at 'Measurement count should be a power of two!', src/main.rs:29:5
[INFO] [stdout] stack backtrace:
[INFO] [stdout]    0:     0x55c88c8cc030 - std::backtrace_rs::backtrace::libunwind::trace::h7cf3ca97bd83fbab
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/libunwind.rs:96
[INFO] [stdout]    1:     0x55c88c8cc030 - std::backtrace_rs::backtrace::trace_unsynchronized::h5a69c674b2d9ea5c
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/../../backtrace/src/backtrace/mod.rs:66
[INFO] [stdout]    2:     0x55c88c8cc030 - std::sys_common::backtrace::_print_fmt::hdf72478dfcb50678
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:79
[INFO] [stdout]    3:     0x55c88c8cc030 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1e0bdbb35e83deca
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:58
[INFO] [stdout]    4:     0x55c88c8ee2cc - core::fmt::write::he67f9b17bcb7ee73
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/fmt/mod.rs:1080
[INFO] [stdout]    5:     0x55c88c86ef96 - std::io::Write::write_fmt::h68b2e5fe4c78e61a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/mod.rs:1516
[INFO] [stdout]    6:     0x55c88c8c684d - std::io::impls::<impl std::io::Write for alloc::boxed::Box<W>>::write_fmt::he9ebec865e28165c
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/io/impls.rs:179
[INFO] [stdout]    7:     0x55c88c8ce54d - std::sys_common::backtrace::_print::haa20918e28a126c5
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:61
[INFO] [stdout]    8:     0x55c88c8ce54d - std::sys_common::backtrace::print::h49e772a4873d9076
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:48
[INFO] [stdout]    9:     0x55c88c8ce54d - std::panicking::default_hook::{{closure}}::hb218b305d15e3f11
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:208
[INFO] [stdout]   10:     0x55c88c8ce1a2 - std::panicking::default_hook::h63997b7b949e1ce0
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:224
[INFO] [stdout]   11:     0x55c88c8cec31 - std::panicking::rust_panic_with_hook::hb54f09ccadf64bd3
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:577
[INFO] [stdout]   12:     0x55c88c8af08c - std::panicking::begin_panic::{{closure}}::h9043b1a011106421
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:506
[INFO] [stdout]   13:     0x55c88c8afb99 - std::sys_common::backtrace::__rust_end_short_backtrace::hebc2b338ff8681b1
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:153
[INFO] [stdout]   14:     0x55c88c8aefb7 - std::panicking::begin_panic::h7083cd9bdbdcbdba
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:505
[INFO] [stdout]   15:     0x55c88c85b7cf - fft::sample::h0fce8810a2da5d57
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:29
[INFO] [stdout]   16:     0x55c88c85f136 - fft::test_recursive_odd_size_fft::h38520977efb45241
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:270
[INFO] [stdout]   17:     0x55c88c85ee7a - fft::test_recursive_odd_size_fft::{{closure}}::h48242814ffb3ecc2
[INFO] [stdout]                                at /opt/rustwide/workdir/src/main.rs:259
[INFO] [stdout]   18:     0x55c88c86cfae - core::ops::function::FnOnce::call_once::h481e2ef101194806
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   19:     0x55c88c895d83 - core::ops::function::FnOnce::call_once::hcd3fa2f0696c1015
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   20:     0x55c88c895d83 - test::__rust_begin_short_backtrace::h113f97c5e5ab7d4a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:516
[INFO] [stdout]   21:     0x55c88c894288 - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h01fd09163cae2442
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   22:     0x55c88c894288 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h0da6b685ae74a04a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stdout]   23:     0x55c88c894288 - std::panicking::try::do_call::h564a32f132f2c264
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stdout]   24:     0x55c88c894288 - std::panicking::try::h477cfd4b06a2e64a
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stdout]   25:     0x55c88c894288 - std::panic::catch_unwind::hdb5abc6d008c399d
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stdout]   26:     0x55c88c894288 - test::run_test_in_process::he8ff7dec91b275be
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:543
[INFO] [stdout]   27:     0x55c88c894288 - test::run_test::run_test_inner::{{closure}}::hfd9f49e4a4ff9162
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/test/src/lib.rs:449
[INFO] [stdout]   28:     0x55c88c86e316 - std::sys_common::backtrace::__rust_begin_short_backtrace::hee6d60d5bb466aff
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys_common/backtrace.rs:137
[INFO] [stdout]   29:     0x55c88c873485 - std::thread::Builder::spawn_unchecked::{{closure}}::{{closure}}::h988cecdf9ebbaf00
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:464
[INFO] [stdout]   30:     0x55c88c873485 - <std::panic::AssertUnwindSafe<F> as core::ops::function::FnOnce<()>>::call_once::h330cf727ec126982
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:308
[INFO] [stdout]   31:     0x55c88c873485 - std::panicking::try::do_call::h6cd25078f4a5ea13
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:381
[INFO] [stdout]   32:     0x55c88c873485 - std::panicking::try::h84b1d49961301705
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panicking.rs:345
[INFO] [stdout]   33:     0x55c88c873485 - std::panic::catch_unwind::h6145324593b3654b
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/panic.rs:382
[INFO] [stdout]   34:     0x55c88c873485 - std::thread::Builder::spawn_unchecked::{{closure}}::ha41e72e8024f9192
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/thread/mod.rs:463
[INFO] [stdout]   35:     0x55c88c873485 - core::ops::function::FnOnce::call_once{{vtable.shim}}::hfb5034cf1f1be223
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/core/src/ops/function.rs:227
[INFO] [stdout]   36:     0x55c88c8d4c5a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::hd4d30e37db281e8f
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   37:     0x55c88c8d4c5a - <alloc::boxed::Box<F> as core::ops::function::FnOnce<A>>::call_once::h019185a215ba16e4
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/alloc/src/boxed.rs:1042
[INFO] [stdout]   38:     0x55c88c8d4c5a - std::sys::unix::thread::Thread::new::thread_start::h33c6d7cf25f9291f
[INFO] [stdout]                                at /rustc/212e76c31d461462544b5d516d3bdc99fc8f016e/library/std/src/sys/unix/thread.rs:87
[INFO] [stdout]   39:     0x7f903fc10609 - start_thread
[INFO] [stdout]   40:     0x7f903fe9b103 - clone
[INFO] [stdout]   41:                0x0 - <unknown>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] failures:
[INFO] [stdout]     test_recursive_odd_size_fft
[INFO] [stdout] 
[INFO] [stdout] test result: FAILED. 2 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b2a5a35b90effa85f1317c6e092808fecff0185d3b2bde43ca31e4caa940a4be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2a5a35b90effa85f1317c6e092808fecff0185d3b2bde43ca31e4caa940a4be", kill_on_drop: false }`
[INFO] [stdout] b2a5a35b90effa85f1317c6e092808fecff0185d3b2bde43ca31e4caa940a4be
