[INFO] updating cached repository https://github.com/BjarkePedersen/Mandelbrot
[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] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3f03960e5699c5531621cf792d71b132dcf95db5
[INFO] checking BjarkePedersen/Mandelbrot against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBjarkePedersen%2FMandelbrot" "/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/BjarkePedersen/Mandelbrot on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/BjarkePedersen/Mandelbrot
[INFO] finished tweaking git repo https://github.com/BjarkePedersen/Mandelbrot
[INFO] tweaked toml for git repo https://github.com/BjarkePedersen/Mandelbrot written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/BjarkePedersen/Mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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=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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 9e77db7517f1fa840bfc0ed7fcf8a1b6583bc432afb1527889a9cf1ab78c37d4
[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" "9e77db7517f1fa840bfc0ed7fcf8a1b6583bc432afb1527889a9cf1ab78c37d4"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]     Checking approx v0.1.1
[INFO] [stderr]     Checking rgb v0.8.11
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling x11-dl v2.14.0
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking arrayvec v0.4.7
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking cgmath v0.16.1
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[INFO] [stderr]    Compiling minifb v0.10.7
[INFO] [stderr]     Checking rayon v0.8.2
[INFO] [stderr]     Checking mandlebrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `cgmath::Vector3`
[INFO] [stderr]  --> src/helpers.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use cgmath::Vector3;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HEIGHT`
[INFO] [stderr]  --> src/helpers.rs:7:6
[INFO] [stderr]   |
[INFO] [stderr] 7 | use {HEIGHT, WIDTH};
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/helpers.rs:159:5
[INFO] [stderr]     |
[INFO] [stderr] 159 |     ((rg << 8) | b)
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut rgb_buffer: Vec<(Col)> = vec![Col::new(0.0, 0.0, 0.0); WIDTH * HEIGHT];
[INFO] [stderr]    |                             ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `cgmath::Vector3`
[INFO] [stderr]  --> src/helpers.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use cgmath::Vector3;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `HEIGHT`
[INFO] [stderr]  --> src/helpers.rs:7:6
[INFO] [stderr]   |
[INFO] [stderr] 7 | use {HEIGHT, WIDTH};
[INFO] [stderr]   |      ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/helpers.rs:159:5
[INFO] [stderr]     |
[INFO] [stderr] 159 |     ((rg << 8) | b)
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/main.rs:18:29
[INFO] [stderr]    |
[INFO] [stderr] 18 |     let mut rgb_buffer: Vec<(Col)> = vec![Col::new(0.0, 0.0, 0.0); WIDTH * HEIGHT];
[INFO] [stderr]    |                             ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.28s
[INFO] running `"docker" "inspect" "9e77db7517f1fa840bfc0ed7fcf8a1b6583bc432afb1527889a9cf1ab78c37d4"`
[INFO] running `"docker" "rm" "-f" "9e77db7517f1fa840bfc0ed7fcf8a1b6583bc432afb1527889a9cf1ab78c37d4"`
[INFO] [stdout] 9e77db7517f1fa840bfc0ed7fcf8a1b6583bc432afb1527889a9cf1ab78c37d4