[INFO] updating cached repository edvorg/mosaic
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/edvorg/mosaic
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/edvorg/mosaic" "work/ex/beta-1.37-6/sources/1.36.0/gh/edvorg/mosaic"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/edvorg/mosaic'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/edvorg/mosaic" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/edvorg/mosaic"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/edvorg/mosaic'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1924e003ea35606875f3aa8ae51f7c2a0947241a
[INFO] sha for GitHub repo edvorg/mosaic: 1924e003ea35606875f3aa8ae51f7c2a0947241a
[INFO] validating manifest of edvorg/mosaic 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 edvorg/mosaic 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 edvorg/mosaic
[INFO] finished frobbing edvorg/mosaic
[INFO] frobbed toml for edvorg/mosaic written to work/ex/beta-1.37-6/sources/1.36.0/gh/edvorg/mosaic/Cargo.toml
[INFO] started frobbing edvorg/mosaic
[INFO] finished frobbing edvorg/mosaic
[INFO] frobbed toml for edvorg/mosaic written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/edvorg/mosaic/Cargo.toml
[INFO] crate edvorg/mosaic 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] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing edvorg/mosaic against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/edvorg/mosaic:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] f40977ce2563ddf401d0b13f739155b2fced2581b593399b2fde4b0a47fdd0b9
[INFO] running `"docker" "start" "-a" "f40977ce2563ddf401d0b13f739155b2fced2581b593399b2fde4b0a47fdd0b9"`
[INFO] [stderr]    Compiling syn v0.15.24
[INFO] [stderr]    Compiling png v0.14.0
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]    Compiling tiff v0.2.1
[INFO] [stderr]    Compiling image v0.21.0
[INFO] [stderr]    Compiling mosaic v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `pixel`
[INFO] [stderr]    --> src/main.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let pixel = output.get_pixel_mut(100, 100);
[INFO] [stderr]     |         ^^^^^ help: consider prefixing with an underscore: `_pixel`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.65s
[INFO] running `"docker" "inspect" "f40977ce2563ddf401d0b13f739155b2fced2581b593399b2fde4b0a47fdd0b9"`
[INFO] running `"docker" "rm" "-f" "f40977ce2563ddf401d0b13f739155b2fced2581b593399b2fde4b0a47fdd0b9"`
[INFO] [stdout] f40977ce2563ddf401d0b13f739155b2fced2581b593399b2fde4b0a47fdd0b9
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/edvorg/mosaic:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] afb64b0a9e2d0f19a0dac87b6898d397b2ee7b2fffc30f0f27db714873b5d687
[INFO] running `"docker" "start" "-a" "afb64b0a9e2d0f19a0dac87b6898d397b2ee7b2fffc30f0f27db714873b5d687"`
[INFO] [stderr]    Compiling mosaic v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `pixel`
[INFO] [stderr]    --> src/main.rs:117:9
[INFO] [stderr]     |
[INFO] [stderr] 117 |     let pixel = output.get_pixel_mut(100, 100);
[INFO] [stderr]     |         ^^^^^ help: consider prefixing with an underscore: `_pixel`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.36s
[INFO] running `"docker" "inspect" "afb64b0a9e2d0f19a0dac87b6898d397b2ee7b2fffc30f0f27db714873b5d687"`
[INFO] running `"docker" "rm" "-f" "afb64b0a9e2d0f19a0dac87b6898d397b2ee7b2fffc30f0f27db714873b5d687"`
[INFO] [stdout] afb64b0a9e2d0f19a0dac87b6898d397b2ee7b2fffc30f0f27db714873b5d687
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/edvorg/mosaic:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] 8e34ed5f132bfb8fbad574ce273ac4ca5dfa4b84a7dcd4a8bb9ba1549199c15a
[INFO] running `"docker" "start" "-a" "8e34ed5f132bfb8fbad574ce273ac4ca5dfa4b84a7dcd4a8bb9ba1549199c15a"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.13s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mosaic-201755f0f93f404e
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "8e34ed5f132bfb8fbad574ce273ac4ca5dfa4b84a7dcd4a8bb9ba1549199c15a"`
[INFO] running `"docker" "rm" "-f" "8e34ed5f132bfb8fbad574ce273ac4ca5dfa4b84a7dcd4a8bb9ba1549199c15a"`
[INFO] [stdout] 8e34ed5f132bfb8fbad574ce273ac4ca5dfa4b84a7dcd4a8bb9ba1549199c15a