[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-1.38-1/sources/1.37.0/gh/edvorg/mosaic"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/edvorg/mosaic'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/edvorg/mosaic" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/edvorg/mosaic"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of edvorg/mosaic 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 edvorg/mosaic
[INFO] finished frobbing edvorg/mosaic
[INFO] frobbed toml for edvorg/mosaic written to work/ex/beta-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing edvorg/mosaic 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-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 6658cb285ba9981af3289741029750894ceec7a4e2e426508a1edff148e20ae3
[INFO] running `"docker" "start" "-a" "6658cb285ba9981af3289741029750894ceec7a4e2e426508a1edff148e20ae3"`
[INFO] [stderr]    Compiling libc v0.2.46
[INFO] [stderr]    Compiling num-derive v0.2.3
[INFO] [stderr]    Compiling inflate v0.4.4
[INFO] [stderr]    Compiling deflate v0.7.19
[INFO] [stderr]    Compiling syn v0.15.24
[INFO] [stderr]    Compiling png v0.14.0
[INFO] [stderr]    Compiling num_cpus v1.9.0
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.3
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[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 38.76s
[INFO] running `"docker" "inspect" "6658cb285ba9981af3289741029750894ceec7a4e2e426508a1edff148e20ae3"`
[INFO] running `"docker" "rm" "-f" "6658cb285ba9981af3289741029750894ceec7a4e2e426508a1edff148e20ae3"`
[INFO] [stdout] 6658cb285ba9981af3289741029750894ceec7a4e2e426508a1edff148e20ae3
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] eb28756f3cc200ce4c6614b5bec841d4ceac3452c63e0c6db431fadc17a24d78
[INFO] running `"docker" "start" "-a" "eb28756f3cc200ce4c6614b5bec841d4ceac3452c63e0c6db431fadc17a24d78"`
[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 0.85s
[INFO] running `"docker" "inspect" "eb28756f3cc200ce4c6614b5bec841d4ceac3452c63e0c6db431fadc17a24d78"`
[INFO] running `"docker" "rm" "-f" "eb28756f3cc200ce4c6614b5bec841d4ceac3452c63e0c6db431fadc17a24d78"`
[INFO] [stdout] eb28756f3cc200ce4c6614b5bec841d4ceac3452c63e0c6db431fadc17a24d78
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] f9aa3b2c626149ebbdae46d108a93e918a644b451fedf20cfc6d437778e026d2
[INFO] running `"docker" "start" "-a" "f9aa3b2c626149ebbdae46d108a93e918a644b451fedf20cfc6d437778e026d2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mosaic-e36f12e3c5e3c382
[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" "f9aa3b2c626149ebbdae46d108a93e918a644b451fedf20cfc6d437778e026d2"`
[INFO] running `"docker" "rm" "-f" "f9aa3b2c626149ebbdae46d108a93e918a644b451fedf20cfc6d437778e026d2"`
[INFO] [stdout] f9aa3b2c626149ebbdae46d108a93e918a644b451fedf20cfc6d437778e026d2