Dec 18 14:46:32.477 INFO checking jpng-0.1.0 against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 14:46:32.477 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-6/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/reg/jpng/0.1.0:/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=forbid" "-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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 14:46:32.901 INFO [stdout] b4932c2ad334a0f298077bb6ee8ca4f3bfadbcc74a7c0ff13aaacca0eb79e2a3
Dec 18 14:46:32.902 INFO running `"docker" "start" "-a" "b4932c2ad334a0f298077bb6ee8ca4f3bfadbcc74a7c0ff13aaacca0eb79e2a3"`
Dec 18 14:46:34.488 INFO [stderr]     Checking image v0.19.0
Dec 18 14:46:39.769 INFO [stderr]     Checking jpng v0.1.0 (/opt/crater/workdir)
Dec 18 14:46:41.528 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 14:46:41.528 INFO [stderr]   --> src/lib.rs:68:9
Dec 18 14:46:41.529 INFO [stderr]    |
Dec 18 14:46:41.529 INFO [stderr] 68 | /         self.image
Dec 18 14:46:41.529 INFO [stderr] 69 | |             .to_rgba()
Dec 18 14:46:41.529 INFO [stderr] 70 | |             .enumerate_pixels()
Dec 18 14:46:41.529 INFO [stderr] 71 | |             .zip(luma.pixels())
Dec 18 14:46:41.529 INFO [stderr] ...  |
Dec 18 14:46:41.529 INFO [stderr] 76 | |                     });
Dec 18 14:46:41.529 INFO [stderr] 77 | |             }).collect::<()>();
Dec 18 14:46:41.529 INFO [stderr]    | |_______________________________^
Dec 18 14:46:41.529 INFO [stderr]    |
Dec 18 14:46:41.529 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 14:46:41.529 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 14:46:41.529 INFO [stderr] 
Dec 18 14:46:41.773 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 14:46:41.773 INFO [stderr]   --> src/lib.rs:68:9
Dec 18 14:46:41.773 INFO [stderr]    |
Dec 18 14:46:41.773 INFO [stderr] 68 | /         self.image
Dec 18 14:46:41.774 INFO [stderr] 69 | |             .to_rgba()
Dec 18 14:46:41.774 INFO [stderr] 70 | |             .enumerate_pixels()
Dec 18 14:46:41.774 INFO [stderr] 71 | |             .zip(luma.pixels())
Dec 18 14:46:41.775 INFO [stderr] ...  |
Dec 18 14:46:41.775 INFO [stderr] 76 | |                     });
Dec 18 14:46:41.775 INFO [stderr] 77 | |             }).collect::<()>();
Dec 18 14:46:41.775 INFO [stderr]    | |_______________________________^
Dec 18 14:46:41.776 INFO [stderr]    |
Dec 18 14:46:41.776 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 14:46:41.776 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 14:46:41.776 INFO [stderr] 
Dec 18 14:46:41.842 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.69s
Dec 18 14:46:43.574 INFO running `"docker" "inspect" "b4932c2ad334a0f298077bb6ee8ca4f3bfadbcc74a7c0ff13aaacca0eb79e2a3"`
Dec 18 14:46:43.808 INFO running `"docker" "rm" "-f" "b4932c2ad334a0f298077bb6ee8ca4f3bfadbcc74a7c0ff13aaacca0eb79e2a3"`
Dec 18 14:46:44.156 INFO [stdout] b4932c2ad334a0f298077bb6ee8ca4f3bfadbcc74a7c0ff13aaacca0eb79e2a3