[INFO] updating cached repository https://github.com/Niwo1493/Rust-Audio-Visualizer [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"` [INFO] [stderr] From https://github.com/Niwo1493/Rust-Audio-Visualizer [INFO] [stderr] c59f2f3..522b436 master -> master [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 522b436890bfa2836fee172ea018d0e4ea2cddbd [INFO] testing Niwo1493/Rust-Audio-Visualizer against 1.44.0 for beta-1.45-1 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNiwo1493%2FRust-Audio-Visualizer" "/workspace/builds/worker-7/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/Niwo1493/Rust-Audio-Visualizer on toolchain 1.44.0 [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/Niwo1493/Rust-Audio-Visualizer [INFO] finished tweaking git repo https://github.com/Niwo1493/Rust-Audio-Visualizer [INFO] tweaked toml for git repo https://github.com/Niwo1493/Rust-Audio-Visualizer written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/Niwo1493/Rust-Audio-Visualizer already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "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-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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"` [INFO] [stdout] bd595bae055b13846eecbc6a7aa0c44250ec5561fe84806b1cfa93d1cfa5f5fe [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `"docker" "start" "-a" "bd595bae055b13846eecbc6a7aa0c44250ec5561fe84806b1cfa93d1cfa5f5fe"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling libc v0.2.70 [INFO] [stderr] Compiling xml-rs v0.8.3 [INFO] [stderr] Compiling khronos_api v3.1.0 [INFO] [stderr] Compiling cc v1.0.53 [INFO] [stderr] Compiling byteorder v1.3.4 [INFO] [stderr] Compiling same-file v1.0.6 [INFO] [stderr] Compiling smallvec v1.4.0 [INFO] [stderr] Compiling instant v0.1.4 [INFO] [stderr] Compiling fnv v1.0.7 [INFO] [stderr] Compiling takeable-option v0.5.0 [INFO] [stderr] Compiling x11-dl v2.18.5 [INFO] [stderr] Compiling ordered-float v1.0.2 [INFO] [stderr] Compiling approx v0.3.2 [INFO] [stderr] Compiling line_drawing v0.7.0 [INFO] [stderr] Compiling num-complex v0.1.43 [INFO] [stderr] Compiling num-traits v0.1.43 [INFO] [stderr] Compiling walkdir v2.3.1 [INFO] [stderr] Compiling stb_truetype v0.3.1 [INFO] [stderr] Compiling dft v0.5.5 [INFO] [stderr] Compiling wayland-scanner v0.23.6 [INFO] [stderr] Compiling gl_generator v0.13.1 [INFO] [stderr] Compiling gl_generator v0.14.0 [INFO] [stderr] Compiling iovec v0.1.4 [INFO] [stderr] Compiling net2 v0.2.34 [INFO] [stderr] Compiling nix v0.14.1 [INFO] [stderr] Compiling memmap v0.7.0 [INFO] [stderr] Compiling parking_lot_core v0.7.2 [INFO] [stderr] Compiling raw-window-handle v0.3.3 [INFO] [stderr] Compiling shared_library v0.1.9 [INFO] [stderr] Compiling backtrace v0.3.48 [INFO] [stderr] Compiling rusttype v0.8.3 [INFO] [stderr] Compiling libloading v0.5.2 [INFO] [stderr] Compiling osmesa-sys v0.1.2 [INFO] [stderr] Compiling parking_lot v0.10.2 [INFO] [stderr] Compiling mio v0.6.22 [INFO] [stderr] Compiling rusttype v0.7.9 [INFO] [stderr] Compiling andrew v0.2.1 [INFO] [stderr] Compiling dlib v0.4.1 [INFO] [stderr] Compiling wayland-sys v0.23.6 [INFO] [stderr] Compiling glium v0.27.0 [INFO] [stderr] Compiling glutin_egl_sys v0.1.4 [INFO] [stderr] Compiling glutin_glx_sys v0.1.6 [INFO] [stderr] Compiling mio-extras v2.0.6 [INFO] [stderr] Compiling wayland-client v0.23.6 [INFO] [stderr] Compiling wayland-protocols v0.23.6 [INFO] [stderr] Compiling calloop v0.4.4 [INFO] [stderr] Compiling wayland-commons v0.23.6 [INFO] [stderr] Compiling smithay-client-toolkit v0.6.6 [INFO] [stderr] Compiling winit v0.22.2 [INFO] [stderr] Compiling glutin v0.24.0 [INFO] [stderr] Compiling audio_visualizer v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `glium::Surface` [INFO] [stderr] --> src/main.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | use glium::Surface; [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused imports: `Display`, `Frame` [INFO] [stderr] --> src/window.rs:2:30 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^ ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `glutin` [INFO] [stderr] --> src/draw.rs:2:13 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `UNIX_EPOCH` [INFO] [stderr] --> src/draw.rs:3:29 [INFO] [stderr] | [INFO] [stderr] 3 | use std::time::{SystemTime, UNIX_EPOCH}; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Surface` [INFO] [stderr] --> src/window.rs:2:21 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `error` [INFO] [stderr] --> src/draw.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | Err(error) => 0f32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_error` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `red` [INFO] [stderr] --> src/draw.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let red = ellapsed.sin(); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_red` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `green` [INFO] [stderr] --> src/draw.rs:49:9 [INFO] [stderr] | [INFO] [stderr] 49 | let green = (ellapsed+PI/2f32).sin(); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_green` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `blue` [INFO] [stderr] --> src/draw.rs:50:9 [INFO] [stderr] | [INFO] [stderr] 50 | let blue = (ellapsed+3f32*PI/2f32).sin(); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_blue` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/window.rs:22:13 [INFO] [stderr] | [INFO] [stderr] 22 | let mut target = display.draw(); [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/window.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let mut event_loop = glutin::event_loop::EventLoop::new(); [INFO] [stderr] | ----^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: function `openWindow` should have a snake case name [INFO] [stderr] --> src/window.rs:8:8 [INFO] [stderr] | [INFO] [stderr] 8 | pub fn openWindow(){ [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `open_window` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `startTime` should have a snake case name [INFO] [stderr] --> src/window.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | let startTime = SystemTime::now(); [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `start_time` [INFO] [stderr] [INFO] [stderr] warning: variable `startTime` should have a snake case name [INFO] [stderr] --> src/draw.rs:7:52 [INFO] [stderr] | [INFO] [stderr] 7 | pub fn draw(mut target: Frame, display: &Display, startTime: &SystemTime) { [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `start_time` [INFO] [stderr] [INFO] [stderr] warning: 14 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 2m 15s [INFO] running `"docker" "inspect" "bd595bae055b13846eecbc6a7aa0c44250ec5561fe84806b1cfa93d1cfa5f5fe"` [INFO] running `"docker" "rm" "-f" "bd595bae055b13846eecbc6a7aa0c44250ec5561fe84806b1cfa93d1cfa5f5fe"` [INFO] [stdout] bd595bae055b13846eecbc6a7aa0c44250ec5561fe84806b1cfa93d1cfa5f5fe [INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] cf7590fb833a5e3121e571ed365b0acc813ab6a6dd854f3fb2a3754c158e8e55 [INFO] running `"docker" "start" "-a" "cf7590fb833a5e3121e571ed365b0acc813ab6a6dd854f3fb2a3754c158e8e55"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] Compiling audio_visualizer v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused import: `glium::Surface` [INFO] [stderr] --> src/main.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | use glium::Surface; [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused imports: `Display`, `Frame` [INFO] [stderr] --> src/window.rs:2:30 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^ ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `glutin` [INFO] [stderr] --> src/draw.rs:2:13 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `UNIX_EPOCH` [INFO] [stderr] --> src/draw.rs:3:29 [INFO] [stderr] | [INFO] [stderr] 3 | use std::time::{SystemTime, UNIX_EPOCH}; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Surface` [INFO] [stderr] --> src/window.rs:2:21 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `error` [INFO] [stderr] --> src/draw.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | Err(error) => 0f32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_error` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `red` [INFO] [stderr] --> src/draw.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let red = ellapsed.sin(); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_red` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `green` [INFO] [stderr] --> src/draw.rs:49:9 [INFO] [stderr] | [INFO] [stderr] 49 | let green = (ellapsed+PI/2f32).sin(); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_green` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `blue` [INFO] [stderr] --> src/draw.rs:50:9 [INFO] [stderr] | [INFO] [stderr] 50 | let blue = (ellapsed+3f32*PI/2f32).sin(); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_blue` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/window.rs:22:13 [INFO] [stderr] | [INFO] [stderr] 22 | let mut target = display.draw(); [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/window.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let mut event_loop = glutin::event_loop::EventLoop::new(); [INFO] [stderr] | ----^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: function `openWindow` should have a snake case name [INFO] [stderr] --> src/window.rs:8:8 [INFO] [stderr] | [INFO] [stderr] 8 | pub fn openWindow(){ [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `open_window` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `startTime` should have a snake case name [INFO] [stderr] --> src/window.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | let startTime = SystemTime::now(); [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `start_time` [INFO] [stderr] [INFO] [stderr] warning: variable `startTime` should have a snake case name [INFO] [stderr] --> src/draw.rs:7:52 [INFO] [stderr] | [INFO] [stderr] 7 | pub fn draw(mut target: Frame, display: &Display, startTime: &SystemTime) { [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `start_time` [INFO] [stderr] [INFO] [stderr] warning: 14 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.98s [INFO] running `"docker" "inspect" "cf7590fb833a5e3121e571ed365b0acc813ab6a6dd854f3fb2a3754c158e8e55"` [INFO] running `"docker" "rm" "-f" "cf7590fb833a5e3121e571ed365b0acc813ab6a6dd854f3fb2a3754c158e8e55"` [INFO] [stdout] cf7590fb833a5e3121e571ed365b0acc813ab6a6dd854f3fb2a3754c158e8e55 [INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 3a728afbc91884f1c8f3efdad6f519a5fecabf9af7d1813ac93bbf858f652e12 [INFO] running `"docker" "start" "-a" "3a728afbc91884f1c8f3efdad6f519a5fecabf9af7d1813ac93bbf858f652e12"` [INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted [INFO] [stderr] warning: unused import: `glium::Surface` [INFO] [stderr] --> src/main.rs:4:5 [INFO] [stderr] | [INFO] [stderr] 4 | use glium::Surface; [INFO] [stderr] | ^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused imports: `Display`, `Frame` [INFO] [stderr] --> src/window.rs:2:30 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^ ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `glutin` [INFO] [stderr] --> src/draw.rs:2:13 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `UNIX_EPOCH` [INFO] [stderr] --> src/draw.rs:3:29 [INFO] [stderr] | [INFO] [stderr] 3 | use std::time::{SystemTime, UNIX_EPOCH}; [INFO] [stderr] | ^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused import: `Surface` [INFO] [stderr] --> src/window.rs:2:21 [INFO] [stderr] | [INFO] [stderr] 2 | use glium::{glutin, Surface, Frame, Display}; [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `error` [INFO] [stderr] --> src/draw.rs:19:13 [INFO] [stderr] | [INFO] [stderr] 19 | Err(error) => 0f32 [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_error` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `red` [INFO] [stderr] --> src/draw.rs:48:9 [INFO] [stderr] | [INFO] [stderr] 48 | let red = ellapsed.sin(); [INFO] [stderr] | ^^^ help: if this is intentional, prefix it with an underscore: `_red` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `green` [INFO] [stderr] --> src/draw.rs:49:9 [INFO] [stderr] | [INFO] [stderr] 49 | let green = (ellapsed+PI/2f32).sin(); [INFO] [stderr] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_green` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `blue` [INFO] [stderr] --> src/draw.rs:50:9 [INFO] [stderr] | [INFO] [stderr] 50 | let blue = (ellapsed+3f32*PI/2f32).sin(); [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_blue` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/window.rs:22:13 [INFO] [stderr] | [INFO] [stderr] 22 | let mut target = display.draw(); [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/window.rs:10:9 [INFO] [stderr] | [INFO] [stderr] 10 | let mut event_loop = glutin::event_loop::EventLoop::new(); [INFO] [stderr] | ----^^^^^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: function `openWindow` should have a snake case name [INFO] [stderr] --> src/window.rs:8:8 [INFO] [stderr] | [INFO] [stderr] 8 | pub fn openWindow(){ [INFO] [stderr] | ^^^^^^^^^^ help: convert the identifier to snake case: `open_window` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(non_snake_case)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable `startTime` should have a snake case name [INFO] [stderr] --> src/window.rs:14:9 [INFO] [stderr] | [INFO] [stderr] 14 | let startTime = SystemTime::now(); [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `start_time` [INFO] [stderr] [INFO] [stderr] warning: variable `startTime` should have a snake case name [INFO] [stderr] --> src/draw.rs:7:52 [INFO] [stderr] | [INFO] [stderr] 7 | pub fn draw(mut target: Frame, display: &Display, startTime: &SystemTime) { [INFO] [stderr] | ^^^^^^^^^ help: convert the identifier to snake case: `start_time` [INFO] [stderr] [INFO] [stderr] warning: 14 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.19s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/audio_visualizer-c5c5b40a2b04b9a4 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `"docker" "inspect" "3a728afbc91884f1c8f3efdad6f519a5fecabf9af7d1813ac93bbf858f652e12"` [INFO] running `"docker" "rm" "-f" "3a728afbc91884f1c8f3efdad6f519a5fecabf9af7d1813ac93bbf858f652e12"` [INFO] [stdout] 3a728afbc91884f1c8f3efdad6f519a5fecabf9af7d1813ac93bbf858f652e12