Dec 18 14:46:33.711 INFO checking jpng-0.1.0 against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 14:46:33.711 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 14:46:34.104 INFO [stdout] e52c99892aa4a0cda0406e41ea4e290faaf36d6feb1f86fa5f13a6687ee90d8f
Dec 18 14:46:34.106 INFO running `"docker" "start" "-a" "e52c99892aa4a0cda0406e41ea4e290faaf36d6feb1f86fa5f13a6687ee90d8f"`
Dec 18 14:46:35.960 INFO [stderr]     Checking image v0.19.0
Dec 18 14:46:41.112 INFO [stderr]     Checking jpng v0.1.0 (/opt/crater/workdir)
Dec 18 14:46:43.076 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 14:46:43.076 INFO [stderr]   --> src/lib.rs:68:9
Dec 18 14:46:43.076 INFO [stderr]    |
Dec 18 14:46:43.076 INFO [stderr] 68 | /         self.image
Dec 18 14:46:43.076 INFO [stderr] 69 | |             .to_rgba()
Dec 18 14:46:43.076 INFO [stderr] 70 | |             .enumerate_pixels()
Dec 18 14:46:43.076 INFO [stderr] 71 | |             .zip(luma.pixels())
Dec 18 14:46:43.076 INFO [stderr] ...  |
Dec 18 14:46:43.076 INFO [stderr] 76 | |                     });
Dec 18 14:46:43.076 INFO [stderr] 77 | |             }).collect::<()>();
Dec 18 14:46:43.076 INFO [stderr]    | |_______________________________^
Dec 18 14:46:43.076 INFO [stderr]    |
Dec 18 14:46:43.076 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 14:46:43.076 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 14:46:43.076 INFO [stderr] 
Dec 18 14:46:43.108 INFO [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
Dec 18 14:46:43.108 INFO [stderr]   --> src/lib.rs:68:9
Dec 18 14:46:43.108 INFO [stderr]    |
Dec 18 14:46:43.108 INFO [stderr] 68 | /         self.image
Dec 18 14:46:43.108 INFO [stderr] 69 | |             .to_rgba()
Dec 18 14:46:43.108 INFO [stderr] 70 | |             .enumerate_pixels()
Dec 18 14:46:43.108 INFO [stderr] 71 | |             .zip(luma.pixels())
Dec 18 14:46:43.108 INFO [stderr] ...  |
Dec 18 14:46:43.108 INFO [stderr] 76 | |                     });
Dec 18 14:46:43.108 INFO [stderr] 77 | |             }).collect::<()>();
Dec 18 14:46:43.108 INFO [stderr]    | |_______________________________^
Dec 18 14:46:43.108 INFO [stderr]    |
Dec 18 14:46:43.108 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 14:46:43.108 INFO [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
Dec 18 14:46:43.108 INFO [stderr] 
Dec 18 14:46:43.180 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.35s
Dec 18 14:46:44.191 INFO running `"docker" "inspect" "e52c99892aa4a0cda0406e41ea4e290faaf36d6feb1f86fa5f13a6687ee90d8f"`
Dec 18 14:46:44.494 INFO running `"docker" "rm" "-f" "e52c99892aa4a0cda0406e41ea4e290faaf36d6feb1f86fa5f13a6687ee90d8f"`
Dec 18 14:46:44.901 INFO [stdout] e52c99892aa4a0cda0406e41ea4e290faaf36d6feb1f86fa5f13a6687ee90d8f