[INFO] crate dssim 2.9.9 is already in cache
[INFO] extracting crate dssim 2.9.9 into work/ex/beta-1.37-6/sources/1.36.0/reg/dssim/2.9.9
[INFO] extracting crate dssim 2.9.9 into work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dssim/2.9.9
[INFO] validating manifest of dssim-2.9.9 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 dssim-2.9.9 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 dssim-2.9.9
[INFO] finished frobbing dssim-2.9.9
[INFO] frobbed toml for dssim-2.9.9 written to work/ex/beta-1.37-6/sources/1.36.0/reg/dssim/2.9.9/Cargo.toml
[INFO] started frobbing dssim-2.9.9
[INFO] finished frobbing dssim-2.9.9
[INFO] frobbed toml for dssim-2.9.9 written to work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dssim/2.9.9/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 dssim-2.9.9 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-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dssim/2.9.9:/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] 5d63b009fc72f607333ed8ef6264894e044ed5cedb05111bec966d2b5c12be7a
[INFO] running `"docker" "start" "-a" "5d63b009fc72f607333ed8ef6264894e044ed5cedb05111bec966d2b5c12be7a"`
[INFO] [stderr]    Compiling lodepng v2.4.2
[INFO] [stderr]    Compiling dssim v2.9.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/blur.rs:143:17
[INFO] [stderr]     |
[INFO] [stderr] 143 |             let mut dstrow = &mut dst[y*dst_stride..y*dst_stride+width];
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.43s
[INFO] running `"docker" "inspect" "5d63b009fc72f607333ed8ef6264894e044ed5cedb05111bec966d2b5c12be7a"`
[INFO] running `"docker" "rm" "-f" "5d63b009fc72f607333ed8ef6264894e044ed5cedb05111bec966d2b5c12be7a"`
[INFO] [stdout] 5d63b009fc72f607333ed8ef6264894e044ed5cedb05111bec966d2b5c12be7a
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dssim/2.9.9:/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] 9a85106166939c4a49aec5652691dea1bccfbfc00e5739cf76591bd90183f957
[INFO] running `"docker" "start" "-a" "9a85106166939c4a49aec5652691dea1bccfbfc00e5739cf76591bd90183f957"`
[INFO] [stderr]    Compiling dssim v2.9.9 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/blur.rs:143:17
[INFO] [stderr]     |
[INFO] [stderr] 143 |             let mut dstrow = &mut dst[y*dst_stride..y*dst_stride+width];
[INFO] [stderr]     |                 ----^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.25s
[INFO] running `"docker" "inspect" "9a85106166939c4a49aec5652691dea1bccfbfc00e5739cf76591bd90183f957"`
[INFO] running `"docker" "rm" "-f" "9a85106166939c4a49aec5652691dea1bccfbfc00e5739cf76591bd90183f957"`
[INFO] [stdout] 9a85106166939c4a49aec5652691dea1bccfbfc00e5739cf76591bd90183f957
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-0/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/reg/dssim/2.9.9:/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] 3108a624f9b1385a967f5d9c4a23f542d909240eed4c6a0d1bd0917e356d270c
[INFO] running `"docker" "start" "-a" "3108a624f9b1385a967f5d9c4a23f542d909240eed4c6a0d1bd0917e356d270c"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/dssim-8f811b100b9d5e7a
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test blur::blur_two ... ok
[INFO] [stdout] test blur::blur_one ... ok
[INFO] [stdout] test blur::blur_one_stride ... ok
[INFO] [stdout] test dssim::poison ... ok
[INFO] [stdout] test blur::blur_zero ... ok
[INFO] [stdout] test dssim::png_compare ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/dssim-0089fcec7b949824
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test rgblu_input ... ok
[INFO] [stdout] test image_gray ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "3108a624f9b1385a967f5d9c4a23f542d909240eed4c6a0d1bd0917e356d270c"`
[INFO] running `"docker" "rm" "-f" "3108a624f9b1385a967f5d9c4a23f542d909240eed4c6a0d1bd0917e356d270c"`
[INFO] [stdout] 3108a624f9b1385a967f5d9c4a23f542d909240eed4c6a0d1bd0917e356d270c