[INFO] cloning repository elementh/rust_mandelbrot
[INFO] running `"git" "clone" "--bare" "git://github.com/elementh/rust_mandelbrot.git" "work/cache/sources/gh/elementh/rust_mandelbrot"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/elementh/rust_mandelbrot'...
[INFO] running `"git" "clone" "work/cache/sources/gh/elementh/rust_mandelbrot" "work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/elementh/rust_mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/elementh/rust_mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/elementh/rust_mandelbrot" "work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/elementh/rust_mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/elementh/rust_mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 67d235dff2c7ad4333227c1c8d6e06bc1183eedf
[INFO] sha for GitHub repo elementh/rust_mandelbrot: 67d235dff2c7ad4333227c1c8d6e06bc1183eedf
[INFO] validating manifest of elementh/rust_mandelbrot on toolchain master#c8865d8e195813ade6b84434ac9f8850e7112d1a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of elementh/rust_mandelbrot on toolchain try#e212b7d492c96d3837691ba29d32d5f468933fb8
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing elementh/rust_mandelbrot
[INFO] finished frobbing elementh/rust_mandelbrot
[INFO] frobbed toml for elementh/rust_mandelbrot written to work/ex/pr-61629/sources/master#c8865d8e195813ade6b84434ac9f8850e7112d1a/gh/elementh/rust_mandelbrot/Cargo.toml
[INFO] started frobbing elementh/rust_mandelbrot
[INFO] finished frobbing elementh/rust_mandelbrot
[INFO] frobbed toml for elementh/rust_mandelbrot written to work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/elementh/rust_mandelbrot/Cargo.toml
[INFO] crate elementh/rust_mandelbrot already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c8865d8e195813ade6b84434ac9f8850e7112d1a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] building elementh/rust_mandelbrot against try#e212b7d492c96d3837691ba29d32d5f468933fb8 for pr-61629
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/elementh/rust_mandelbrot:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "build" "--frozen"`
[INFO] [stdout] 0fd7aa04493823d30331c2f5c12991ebc1ed2b3046fc0e07b8fdf185e08c4496
[INFO] running `"docker" "start" "-a" "0fd7aa04493823d30331c2f5c12991ebc1ed2b3046fc0e07b8fdf185e08c4496"`
[INFO] [stderr]    Compiling num-integer v0.1.36
[INFO] [stderr]    Compiling atty v0.2.6
[INFO] [stderr]    Compiling num-complex v0.1.42
[INFO] [stderr]    Compiling clap v2.30.0
[INFO] [stderr]    Compiling num-bigint v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.35
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `escape_time`
[INFO] [stderr]   --> src/main.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn escape_time(c: Complex<f64>, limit: u32) -> Option<u32> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_pair`
[INFO] [stderr]   --> src/main.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn parse_pair<T: FromStr>(s: &str, separator: char) -> Option<(T, T)> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `parse_complex`
[INFO] [stderr]   --> src/main.rs:40:1
[INFO] [stderr]    |
[INFO] [stderr] 40 | fn parse_complex(s:&str) -> Option<Complex<f64>> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `pixel_to_point`
[INFO] [stderr]   --> src/main.rs:47:1
[INFO] [stderr]    |
[INFO] [stderr] 47 | / fn pixel_to_point(bounds: (usize, usize),
[INFO] [stderr] 48 | |                   pixel: (usize, usize),
[INFO] [stderr] 49 | |                   upper_left: Complex<f64>,
[INFO] [stderr] 50 | |                   lower_right: Complex<f64>)
[INFO] [stderr] ...  |
[INFO] [stderr] 59 | |     }
[INFO] [stderr] 60 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.12s
[INFO] running `"docker" "inspect" "0fd7aa04493823d30331c2f5c12991ebc1ed2b3046fc0e07b8fdf185e08c4496"`
[INFO] running `"docker" "rm" "-f" "0fd7aa04493823d30331c2f5c12991ebc1ed2b3046fc0e07b8fdf185e08c4496"`
[INFO] [stdout] 0fd7aa04493823d30331c2f5c12991ebc1ed2b3046fc0e07b8fdf185e08c4496
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61629/worker-4/try#e212b7d492c96d3837691ba29d32d5f468933fb8:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61629/sources/try#e212b7d492c96d3837691ba29d32d5f468933fb8/gh/elementh/rust_mandelbrot:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e212b7d492c96d3837691ba29d32d5f468933fb8-alt" "test" "--frozen" "--no-run"`
[INFO] [stdout] ccc8a7f1d2b29e6d5c1e6745de93c4f6459467ab3aa45556f96ee64d88b8430d
[INFO] running `"docker" "start" "-a" "ccc8a7f1d2b29e6d5c1e6745de93c4f6459467ab3aa45556f96ee64d88b8430d"`
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `escape_time`
[INFO] [stderr]   --> src/main.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn escape_time(c: Complex<f64>, limit: u32) -> Option<u32> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.85s
[INFO] running `"docker" "inspect" "ccc8a7f1d2b29e6d5c1e6745de93c4f6459467ab3aa45556f96ee64d88b8430d"`
[INFO] running `"docker" "rm" "-f" "ccc8a7f1d2b29e6d5c1e6745de93c4f6459467ab3aa45556f96ee64d88b8430d"`
[INFO] [stdout] ccc8a7f1d2b29e6d5c1e6745de93c4f6459467ab3aa45556f96ee64d88b8430d