[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-1.38-1/sources/1.37.0/gh/suke/mandelbrot_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/suke/mandelbrot_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/suke/mandelbrot_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/suke/mandelbrot_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of suke/mandelbrot_rust on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing suke/mandelbrot_rust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 4557d069ee4af97ad3497cbd81f9b0cb372b49702effc598f9e2962f6ac07134
[INFO] running `"docker" "start" "-a" "4557d069ee4af97ad3497cbd81f9b0cb372b49702effc598f9e2962f6ac07134"`
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling png v0.7.0
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[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 26.89s
[INFO] running `"docker" "inspect" "4557d069ee4af97ad3497cbd81f9b0cb372b49702effc598f9e2962f6ac07134"`
[INFO] running `"docker" "rm" "-f" "4557d069ee4af97ad3497cbd81f9b0cb372b49702effc598f9e2962f6ac07134"`
[INFO] [stdout] 4557d069ee4af97ad3497cbd81f9b0cb372b49702effc598f9e2962f6ac07134
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] c5aad76597176c72fc6fcc3015fe2741d587420f44dcc0e73944a193aadcd893
[INFO] running `"docker" "start" "-a" "c5aad76597176c72fc6fcc3015fe2741d587420f44dcc0e73944a193aadcd893"`
[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 1.57s
[INFO] running `"docker" "inspect" "c5aad76597176c72fc6fcc3015fe2741d587420f44dcc0e73944a193aadcd893"`
[INFO] running `"docker" "rm" "-f" "c5aad76597176c72fc6fcc3015fe2741d587420f44dcc0e73944a193aadcd893"`
[INFO] [stdout] c5aad76597176c72fc6fcc3015fe2741d587420f44dcc0e73944a193aadcd893
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 45d5b8095a88c9d80bb267d0607d4ec1244e964ac4615c4c7de4c993334cee9f
[INFO] running `"docker" "start" "-a" "45d5b8095a88c9d80bb267d0607d4ec1244e964ac4615c4c7de4c993334cee9f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mandelbrot-b579009cfd788620
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test test_parse_complex ... ok
[INFO] [stdout] test test_parse_pair ... ok
[INFO] [stdout] test test_pixel_to_point ... 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" "45d5b8095a88c9d80bb267d0607d4ec1244e964ac4615c4c7de4c993334cee9f"`
[INFO] running `"docker" "rm" "-f" "45d5b8095a88c9d80bb267d0607d4ec1244e964ac4615c4c7de4c993334cee9f"`
[INFO] [stdout] 45d5b8095a88c9d80bb267d0607d4ec1244e964ac4615c4c7de4c993334cee9f