[INFO] updating cached repository suke/mandelbrot_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/suke/mandelbrot_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/suke/mandelbrot_rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/suke/mandelbrot_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/suke/mandelbrot_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/suke/mandelbrot_rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/suke/mandelbrot_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/suke/mandelbrot_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] be1a79c6ecac7f89d52020d94137f3478a36f5a0
[INFO] sha for GitHub repo suke/mandelbrot_rust: be1a79c6ecac7f89d52020d94137f3478a36f5a0
[INFO] validating manifest of suke/mandelbrot_rust on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of suke/mandelbrot_rust on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing suke/mandelbrot_rust
[INFO] finished frobbing suke/mandelbrot_rust
[INFO] frobbed toml for suke/mandelbrot_rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/suke/mandelbrot_rust/Cargo.toml
[INFO] started frobbing suke/mandelbrot_rust
[INFO] finished frobbing suke/mandelbrot_rust
[INFO] frobbed toml for suke/mandelbrot_rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/suke/mandelbrot_rust/Cargo.toml
[INFO] crate suke/mandelbrot_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing suke/mandelbrot_rust against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/suke/mandelbrot_rust:/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 1e620530b34403c08a98d7ef1c64900b1c97bcb89cc0e51ebe2a50f0cc84cf32
[INFO] running `"docker" "start" "-a" "1e620530b34403c08a98d7ef1c64900b1c97bcb89cc0e51ebe2a50f0cc84cf32"`
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling enum_primitive v0.1.1
[INFO] [stderr]    Compiling png v0.7.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling image v0.13.0
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | /     encoder.encode(&pixels,
[INFO] [stderr] 123 | |                   bounds.0 as u32, bounds.1 as u32,
[INFO] [stderr] 124 | |                   ColorType::Gray(8));
[INFO] [stderr]     | |______________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.44s
[INFO] running `"docker" "inspect" "1e620530b34403c08a98d7ef1c64900b1c97bcb89cc0e51ebe2a50f0cc84cf32"`
[INFO] running `"docker" "rm" "-f" "1e620530b34403c08a98d7ef1c64900b1c97bcb89cc0e51ebe2a50f0cc84cf32"`
[INFO] [stdout] 1e620530b34403c08a98d7ef1c64900b1c97bcb89cc0e51ebe2a50f0cc84cf32
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/suke/mandelbrot_rust:/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] a3dcce40660cd64d6fa8a95f50a78fbb59be5a0f52f650fa9a318f6da3d45c48
[INFO] running `"docker" "start" "-a" "a3dcce40660cd64d6fa8a95f50a78fbb59be5a0f52f650fa9a318f6da3d45c48"`
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/main.rs:122:5
[INFO] [stderr]     |
[INFO] [stderr] 122 | /     encoder.encode(&pixels,
[INFO] [stderr] 123 | |                   bounds.0 as u32, bounds.1 as u32,
[INFO] [stderr] 124 | |                   ColorType::Gray(8));
[INFO] [stderr]     | |______________________________________^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.47s
[INFO] running `"docker" "inspect" "a3dcce40660cd64d6fa8a95f50a78fbb59be5a0f52f650fa9a318f6da3d45c48"`
[INFO] running `"docker" "rm" "-f" "a3dcce40660cd64d6fa8a95f50a78fbb59be5a0f52f650fa9a318f6da3d45c48"`
[INFO] [stdout] a3dcce40660cd64d6fa8a95f50a78fbb59be5a0f52f650fa9a318f6da3d45c48
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/suke/mandelbrot_rust:/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 9cf8d300eae5db8fffdae55e9380ccd50cc9e90adddc5ab4c1b68bad74e8f85a
[INFO] running `"docker" "start" "-a" "9cf8d300eae5db8fffdae55e9380ccd50cc9e90adddc5ab4c1b68bad74e8f85a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mandelbrot-e4a0fcc7359db3f0
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_parse_complex ... ok
[INFO] [stdout] test test_pixel_to_point ... ok
[INFO] [stdout] test test_parse_pair ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "9cf8d300eae5db8fffdae55e9380ccd50cc9e90adddc5ab4c1b68bad74e8f85a"`
[INFO] running `"docker" "rm" "-f" "9cf8d300eae5db8fffdae55e9380ccd50cc9e90adddc5ab4c1b68bad74e8f85a"`
[INFO] [stdout] 9cf8d300eae5db8fffdae55e9380ccd50cc9e90adddc5ab4c1b68bad74e8f85a