[INFO] cloning repository https://github.com/MatthewFrench/Image-Difference-Cutter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/MatthewFrench/Image-Difference-Cutter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthewFrench%2FImage-Difference-Cutter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthewFrench%2FImage-Difference-Cutter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 18c974e50ca1f728a60a393723096dc4517517c0
[INFO] testing MatthewFrench/Image-Difference-Cutter against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthewFrench%2FImage-Difference-Cutter" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MatthewFrench/Image-Difference-Cutter on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/MatthewFrench/Image-Difference-Cutter
[INFO] finished tweaking git repo https://github.com/MatthewFrench/Image-Difference-Cutter
[INFO] tweaked toml for git repo https://github.com/MatthewFrench/Image-Difference-Cutter written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/MatthewFrench/Image-Difference-Cutter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8faeed60944ad13567abe225b70deb6b0bccf437084a80315a1f1bd8bdcb7c7d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8faeed60944ad13567abe225b70deb6b0bccf437084a80315a1f1bd8bdcb7c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8faeed60944ad13567abe225b70deb6b0bccf437084a80315a1f1bd8bdcb7c7d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8faeed60944ad13567abe225b70deb6b0bccf437084a80315a1f1bd8bdcb7c7d", kill_on_drop: false }`
[INFO] [stdout] 8faeed60944ad13567abe225b70deb6b0bccf437084a80315a1f1bd8bdcb7c7d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ea2da2cc816e133012f54fe6efb9c0864992eefd424385665b734e920482a70e
[INFO] running `Command { std: "docker" "start" "-a" "ea2da2cc816e133012f54fe6efb9c0864992eefd424385665b734e920482a70e", kill_on_drop: false }`
[INFO] [stderr]    Compiling jpeg-decoder v0.1.18
[INFO] [stderr]    Compiling image v0.22.3
[INFO] [stderr]    Compiling Image-Difference-Cutter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/main.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |             let r1 = image1_pixel[0] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g1`
[INFO] [stdout]   --> src/main.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |             let g1 = image1_pixel[1] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_g1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b1`
[INFO] [stdout]   --> src/main.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |             let b1 = image1_pixel[2] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_b1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]   --> src/main.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |             let a1 = image1_pixel[3] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/main.rs:37:17
[INFO] [stdout]    |
[INFO] [stdout] 37 |             let r2 = image2_pixel[0] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g2`
[INFO] [stdout]   --> src/main.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let g2 = image2_pixel[1] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_g2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b2`
[INFO] [stdout]   --> src/main.rs:39:17
[INFO] [stdout]    |
[INFO] [stdout] 39 |             let b2 = image2_pixel[2] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_b2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/main.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |             let a2 = image2_pixel[3] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Image_Difference_Cutter` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `image_difference_cutter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.25s
[INFO] running `Command { std: "docker" "inspect" "ea2da2cc816e133012f54fe6efb9c0864992eefd424385665b734e920482a70e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea2da2cc816e133012f54fe6efb9c0864992eefd424385665b734e920482a70e", kill_on_drop: false }`
[INFO] [stdout] ea2da2cc816e133012f54fe6efb9c0864992eefd424385665b734e920482a70e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c0701f19f81dad58f3e4ef4aaf455007cccc6d4e64b276e1a24384a69c542317
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "c0701f19f81dad58f3e4ef4aaf455007cccc6d4e64b276e1a24384a69c542317", kill_on_drop: false }`
[INFO] [stderr]    Compiling Image-Difference-Cutter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/main.rs:33:17
[INFO] [stdout]    |
[INFO] [stdout] 33 |             let r1 = image1_pixel[0] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g1`
[INFO] [stdout]   --> src/main.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |             let g1 = image1_pixel[1] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_g1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b1`
[INFO] [stdout]   --> src/main.rs:35:17
[INFO] [stdout]    |
[INFO] [stdout] 35 |             let b1 = image1_pixel[2] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_b1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a1`
[INFO] [stdout]   --> src/main.rs:36:17
[INFO] [stdout]    |
[INFO] [stdout] 36 |             let a1 = image1_pixel[3] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/main.rs:37:17
[INFO] [stdout]    |
[INFO] [stdout] 37 |             let r2 = image2_pixel[0] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `g2`
[INFO] [stdout]   --> src/main.rs:38:17
[INFO] [stdout]    |
[INFO] [stdout] 38 |             let g2 = image2_pixel[1] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_g2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b2`
[INFO] [stdout]   --> src/main.rs:39:17
[INFO] [stdout]    |
[INFO] [stdout] 39 |             let b2 = image2_pixel[2] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_b2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a2`
[INFO] [stdout]   --> src/main.rs:40:17
[INFO] [stdout]    |
[INFO] [stdout] 40 |             let a2 = image2_pixel[3] as i32;
[INFO] [stdout]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `Image_Difference_Cutter` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `image_difference_cutter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.37s
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c0701f19f81dad58f3e4ef4aaf455007cccc6d4e64b276e1a24384a69c542317", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c0701f19f81dad58f3e4ef4aaf455007cccc6d4e64b276e1a24384a69c542317", kill_on_drop: false }`
[INFO] [stdout] c0701f19f81dad58f3e4ef4aaf455007cccc6d4e64b276e1a24384a69c542317
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] e456979ac7a05c75bcfc62baf4efd78bc858d49e9f3dddb9122392df61453f8a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "e456979ac7a05c75bcfc62baf4efd78bc858d49e9f3dddb9122392df61453f8a", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/main.rs:33:17
[INFO] [stderr]    |
[INFO] [stderr] 33 |             let r1 = image1_pixel[0] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g1`
[INFO] [stderr]   --> src/main.rs:34:17
[INFO] [stderr]    |
[INFO] [stderr] 34 |             let g1 = image1_pixel[1] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_g1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b1`
[INFO] [stderr]   --> src/main.rs:35:17
[INFO] [stderr]    |
[INFO] [stderr] 35 |             let b1 = image1_pixel[2] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_b1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a1`
[INFO] [stderr]   --> src/main.rs:36:17
[INFO] [stderr]    |
[INFO] [stderr] 36 |             let a1 = image1_pixel[3] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_a1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/main.rs:37:17
[INFO] [stderr]    |
[INFO] [stderr] 37 |             let r2 = image2_pixel[0] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `g2`
[INFO] [stderr]   --> src/main.rs:38:17
[INFO] [stderr]    |
[INFO] [stderr] 38 |             let g2 = image2_pixel[1] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_g2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b2`
[INFO] [stderr]   --> src/main.rs:39:17
[INFO] [stderr]    |
[INFO] [stderr] 39 |             let b2 = image2_pixel[2] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_b2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a2`
[INFO] [stderr]   --> src/main.rs:40:17
[INFO] [stderr]    |
[INFO] [stderr] 40 |             let a2 = image2_pixel[3] as i32;
[INFO] [stderr]    |                 ^^ help: if this is intentional, prefix it with an underscore: `_a2`
[INFO] [stderr] 
[INFO] [stderr] warning: crate `Image_Difference_Cutter` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `image_difference_cutter`
[INFO] [stderr] 
[INFO] [stderr] warning: `Image-Difference-Cutter` (bin "Image-Difference-Cutter" test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/Image_Difference_Cutter-dfaf172955ee2df7)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "e456979ac7a05c75bcfc62baf4efd78bc858d49e9f3dddb9122392df61453f8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e456979ac7a05c75bcfc62baf4efd78bc858d49e9f3dddb9122392df61453f8a", kill_on_drop: false }`
[INFO] [stdout] e456979ac7a05c75bcfc62baf4efd78bc858d49e9f3dddb9122392df61453f8a