[INFO] updating cached repository jefflembeck/img_stats
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jefflembeck/img_stats
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jefflembeck/img_stats" "work/ex/beta-1.37-6/sources/1.36.0/gh/jefflembeck/img_stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/jefflembeck/img_stats'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jefflembeck/img_stats" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jefflembeck/img_stats"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jefflembeck/img_stats'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4326278b3ce5f3ac81f54897763922d355652732
[INFO] sha for GitHub repo jefflembeck/img_stats: 4326278b3ce5f3ac81f54897763922d355652732
[INFO] validating manifest of jefflembeck/img_stats 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 jefflembeck/img_stats 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 jefflembeck/img_stats
[INFO] finished frobbing jefflembeck/img_stats
[INFO] frobbed toml for jefflembeck/img_stats written to work/ex/beta-1.37-6/sources/1.36.0/gh/jefflembeck/img_stats/Cargo.toml
[INFO] started frobbing jefflembeck/img_stats
[INFO] finished frobbing jefflembeck/img_stats
[INFO] frobbed toml for jefflembeck/img_stats written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/jefflembeck/img_stats/Cargo.toml
[INFO] crate jefflembeck/img_stats already has a lockfile, it will not be regenerated
[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 jefflembeck/img_stats against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/jefflembeck/img_stats:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] e8450f6f52e8a6c4055f32204561c3f2477cd00147e7cb992dad265d4c6a6c34
[INFO] running `"docker" "start" "-a" "e8450f6f52e8a6c4055f32204561c3f2477cd00147e7cb992dad265d4c6a6c34"`
[INFO] [stderr]    Compiling img_stats v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `width`
[INFO] [stderr]   --> src/main.rs:46:21
[INFO] [stderr]    |
[INFO] [stderr] 46 |                 let width = iter.next();
[INFO] [stderr]    |                     ^^^^^ help: consider prefixing with an underscore: `_width`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:32:9
[INFO] [stderr]    |
[INFO] [stderr] 32 |     let mut file = get_file("./test/security.png");
[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] error[E0382]: borrow of moved value: `iter`
[INFO] [stderr]   --> src/main.rs:46:29
[INFO] [stderr]    |
[INFO] [stderr] 43 |         let mut iter = buffer.chunks(4);
[INFO] [stderr]    |             -------- move occurs because `iter` has type `std::slice::Chunks<'_, u8>`, which does not implement the `Copy` trait
[INFO] [stderr] 44 |         for chunk in iter {
[INFO] [stderr]    |                      ---- value moved here
[INFO] [stderr] 45 |             if chunk == [73, 72, 68, 82] {
[INFO] [stderr] 46 |                 let width = iter.next();
[INFO] [stderr]    |                             ^^^^ value borrowed here after move
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0382`.
[INFO] [stderr] error: Could not compile `img_stats`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e8450f6f52e8a6c4055f32204561c3f2477cd00147e7cb992dad265d4c6a6c34"`
[INFO] running `"docker" "rm" "-f" "e8450f6f52e8a6c4055f32204561c3f2477cd00147e7cb992dad265d4c6a6c34"`
[INFO] [stdout] e8450f6f52e8a6c4055f32204561c3f2477cd00147e7cb992dad265d4c6a6c34