[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] checking MatthewFrench/Image-Difference-Cutter against try#b1f2594eac607c1f051534800237eeedb5590a49 for pr-139493-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMatthewFrench%2FImage-Difference-Cutter" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[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-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/MatthewFrench/Image-Difference-Cutter on toolchain b1f2594eac607c1f051534800237eeedb5590a49
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/MatthewFrench/Image-Difference-Cutter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c92f55a0b575c9f4b488144fb95320dc7d8fbf60e64081ee399f6909b799c4cb
[INFO] running `Command { std: "docker" "start" "-a" "c92f55a0b575c9f4b488144fb95320dc7d8fbf60e64081ee399f6909b799c4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c92f55a0b575c9f4b488144fb95320dc7d8fbf60e64081ee399f6909b799c4cb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c92f55a0b575c9f4b488144fb95320dc7d8fbf60e64081ee399f6909b799c4cb", kill_on_drop: false }`
[INFO] [stdout] c92f55a0b575c9f4b488144fb95320dc7d8fbf60e64081ee399f6909b799c4cb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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:aa71247004a7fa38d13ec170f48f06cdedf5bc50b2a8645e56ed7e992e6fa513" "/opt/rustwide/cargo-home/bin/cargo" "+b1f2594eac607c1f051534800237eeedb5590a49" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5b173054114299be7fc57837ba637dae538e6ba4d0cbff175120c7b02f3611e9
[INFO] running `Command { std: "docker" "start" "-a" "5b173054114299be7fc57837ba637dae538e6ba4d0cbff175120c7b02f3611e9", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.0
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]     Checking scopeguard v1.0.0
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]     Checking adler32 v1.0.4
[INFO] [stderr]    Compiling num-derive v0.2.5
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling crc32fast v1.2.0
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling memoffset v0.5.3
[INFO] [stderr]     Checking num_cpus v1.11.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking lzw v0.10.0
[INFO] [stderr]     Checking color_quant v1.0.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking deflate v0.7.20
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking gif v0.10.3
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking png v0.15.2
[INFO] [stderr]     Checking crossbeam-deque v0.7.2
[INFO] [stderr]     Checking num-iter v0.1.39
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.18
[INFO] [stderr]     Checking tiff v0.3.1
[INFO] [stderr]     Checking image v0.22.3
[INFO] [stderr]     Checking 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)]` (part of `#[warn(unused)]`) 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: 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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.45s
[INFO] running `Command { std: "docker" "inspect" "5b173054114299be7fc57837ba637dae538e6ba4d0cbff175120c7b02f3611e9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b173054114299be7fc57837ba637dae538e6ba4d0cbff175120c7b02f3611e9", kill_on_drop: false }`
[INFO] [stdout] 5b173054114299be7fc57837ba637dae538e6ba4d0cbff175120c7b02f3611e9