[INFO] cloning repository https://github.com/Mist124/rusty_mandelbrot
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Mist124/rusty_mandelbrot" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMist124%2Frusty_mandelbrot", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMist124%2Frusty_mandelbrot'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 45f4f891ba09f65d6c590f8e2b6c24a2005f3cc8
[INFO] checking Mist124/rusty_mandelbrot against try#7b3565da729099dbe807466fcd118fb2815986e0 for pr-81789
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMist124%2Frusty_mandelbrot" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Mist124/rusty_mandelbrot on toolchain 7b3565da729099dbe807466fcd118fb2815986e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Mist124/rusty_mandelbrot
[INFO] finished tweaking git repo https://github.com/Mist124/rusty_mandelbrot
[INFO] tweaked toml for git repo https://github.com/Mist124/rusty_mandelbrot written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/Mist124/rusty_mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 11dfc9edb9a24b58b15d1b79b7f65d9618af5a8c9293bb3800e367bc3a8e8cf5
[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" "11dfc9edb9a24b58b15d1b79b7f65d9618af5a8c9293bb3800e367bc3a8e8cf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "11dfc9edb9a24b58b15d1b79b7f65d9618af5a8c9293bb3800e367bc3a8e8cf5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11dfc9edb9a24b58b15d1b79b7f65d9618af5a8c9293bb3800e367bc3a8e8cf5", kill_on_drop: false }`
[INFO] [stdout] 11dfc9edb9a24b58b15d1b79b7f65d9618af5a8c9293bb3800e367bc3a8e8cf5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+7b3565da729099dbe807466fcd118fb2815986e0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91fcf74d2a3fbe800254a556239611b43cd14f1e76c956a9965e8dd26f537b8e
[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" "91fcf74d2a3fbe800254a556239611b43cd14f1e76c956a9965e8dd26f537b8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking png v0.16.7
[INFO] [stderr]     Checking mandelbrot v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `trap`
[INFO] [stdout]    --> src/fractals.rs:161:40
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn mandelbrot_trap(x: f64, y: f64, trap: &dyn Fn(f64, f64) -> f64) -> f64 {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_trap`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/fractals.rs:54:16
[INFO] [stdout]    |
[INFO] [stdout] 54 |         pub fn new(from: Sector, to: Sector) -> SectorZoom {
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mandelbrot_trap`
[INFO] [stdout]    --> src/fractals.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn mandelbrot_trap(x: f64, y: f64, trap: &dyn Fn(f64, f64) -> f64) -> f64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mandelbrot_its`
[INFO] [stdout]    --> src/fractals.rs:215:8
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub fn mandelbrot_its(x: f64, y: f64, max_iter: u32) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_histogram`
[INFO] [stdout]    --> src/fractals.rs:256:8
[INFO] [stdout]     |
[INFO] [stdout] 256 | pub fn render_histogram(sector: zoom::Sector, max_iter: u32, fractal: &dyn Fn(f64, f64, u32) -> u32, detail: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `smooth`
[INFO] [stdout]    --> src/fractals.rs:372:12
[INFO] [stdout]     |
[INFO] [stdout] 372 |     pub fn smooth(x: f64) -> f64 {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `trap`
[INFO] [stdout]    --> src/fractals.rs:161:40
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn mandelbrot_trap(x: f64, y: f64, trap: &dyn Fn(f64, f64) -> f64) -> f64 {
[INFO] [stdout]     |                                        ^^^^ help: if this is intentional, prefix it with an underscore: `_trap`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/fractals.rs:54:16
[INFO] [stdout]    |
[INFO] [stdout] 54 |         pub fn new(from: Sector, to: Sector) -> SectorZoom {
[INFO] [stdout]    |                ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mandelbrot_trap`
[INFO] [stdout]    --> src/fractals.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | pub fn mandelbrot_trap(x: f64, y: f64, trap: &dyn Fn(f64, f64) -> f64) -> f64 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `mandelbrot_its`
[INFO] [stdout]    --> src/fractals.rs:215:8
[INFO] [stdout]     |
[INFO] [stdout] 215 | pub fn mandelbrot_its(x: f64, y: f64, max_iter: u32) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `render_histogram`
[INFO] [stdout]    --> src/fractals.rs:256:8
[INFO] [stdout]     |
[INFO] [stdout] 256 | pub fn render_histogram(sector: zoom::Sector, max_iter: u32, fractal: &dyn Fn(f64, f64, u32) -> u32, detail: usize) {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `smooth`
[INFO] [stdout]    --> src/fractals.rs:372:12
[INFO] [stdout]     |
[INFO] [stdout] 372 |     pub fn smooth(x: f64) -> f64 {
[INFO] [stdout]     |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [optimized + debuginfo] target(s) in 2.49s
[INFO] running `Command { std: "docker" "inspect" "91fcf74d2a3fbe800254a556239611b43cd14f1e76c956a9965e8dd26f537b8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91fcf74d2a3fbe800254a556239611b43cd14f1e76c956a9965e8dd26f537b8e", kill_on_drop: false }`
[INFO] [stdout] 91fcf74d2a3fbe800254a556239611b43cd14f1e76c956a9965e8dd26f537b8e