[INFO] cloning repository https://github.com/jefflembeck/img_stats
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jefflembeck/img_stats" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjefflembeck%2Fimg_stats", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjefflembeck%2Fimg_stats'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4326278b3ce5f3ac81f54897763922d355652732
[INFO] testing jefflembeck/img_stats against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjefflembeck%2Fimg_stats" "/workspace/builds/worker-22/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-22/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jefflembeck/img_stats on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jefflembeck/img_stats
[INFO] finished tweaking git repo https://github.com/jefflembeck/img_stats
[INFO] tweaked toml for git repo https://github.com/jefflembeck/img_stats written to /workspace/builds/worker-22/source/Cargo.toml
[INFO] crate git repo https://github.com/jefflembeck/img_stats already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b8a8fdcf165347e498442ef68c078cc384d8540a0851892ea6b2fd73e8029879
[INFO] running `Command { std: "docker" "start" "-a" "b8a8fdcf165347e498442ef68c078cc384d8540a0851892ea6b2fd73e8029879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b8a8fdcf165347e498442ef68c078cc384d8540a0851892ea6b2fd73e8029879", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b8a8fdcf165347e498442ef68c078cc384d8540a0851892ea6b2fd73e8029879", kill_on_drop: false }`
[INFO] [stdout] b8a8fdcf165347e498442ef68c078cc384d8540a0851892ea6b2fd73e8029879
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-22/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8c30a46a5235079afaf85264b28abddc8628aacde4cad096eb93c8d036b59d6e
[INFO] running `Command { std: "docker" "start" "-a" "8c30a46a5235079afaf85264b28abddc8628aacde4cad096eb93c8d036b59d6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling img_stats v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `width`
[INFO] [stdout]   --> src/main.rs:46:21
[INFO] [stdout]    |
[INFO] [stdout] 46 |                 let width = iter.next();
[INFO] [stdout]    |                     ^^^^^ help: if this is intentional, prefix it with an underscore: `_width`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/main.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let mut file = get_file("./test/security.png");
[INFO] [stdout]    |         ----^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0382]: borrow of moved value: `iter`
[INFO] [stdout]    --> src/main.rs:46:29
[INFO] [stdout]     |
[INFO] [stdout] 43  |         let mut iter = buffer.chunks(4);
[INFO] [stdout]     |             -------- move occurs because `iter` has type `Chunks<'_, u8>`, which does not implement the `Copy` trait
[INFO] [stdout] 44  |         for chunk in iter {
[INFO] [stdout]     |                      ----
[INFO] [stdout]     |                      |
[INFO] [stdout]     |                      `iter` moved due to this implicit call to `.into_iter()`
[INFO] [stdout]     |                      help: consider borrowing to avoid moving into the for loop: `&iter`
[INFO] [stdout] 45  |             if chunk == [73, 72, 68, 82] {
[INFO] [stdout] 46  |                 let width = iter.next();
[INFO] [stdout]     |                             ^^^^^^^^^^^ value borrowed here after move
[INFO] [stdout]     |
[INFO] [stdout] note: this function takes ownership of the receiver `self`, which moves `iter`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0382`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `img_stats` due to 2 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "8c30a46a5235079afaf85264b28abddc8628aacde4cad096eb93c8d036b59d6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c30a46a5235079afaf85264b28abddc8628aacde4cad096eb93c8d036b59d6e", kill_on_drop: false }`
[INFO] [stdout] 8c30a46a5235079afaf85264b28abddc8628aacde4cad096eb93c8d036b59d6e