[INFO] crate jpng 0.1.0 is already in cache
[INFO] checking jpng-0.1.0 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate jpng 0.1.0 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate jpng 0.1.0 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate jpng 0.1.0
[INFO] finished tweaking crates.io crate jpng 0.1.0
[INFO] tweaked toml for crates.io crate jpng 0.1.0 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 33658d9473b7b21ef16835e2fe66999c240ac436f44df568f3fa6c30d77b68b7
[INFO] running `"docker" "start" "-a" "33658d9473b7b21ef16835e2fe66999c240ac436f44df568f3fa6c30d77b68b7"`
[INFO] [stderr]     Checking jpeg-decoder v0.1.17
[INFO] [stderr]     Checking image v0.19.0
[INFO] [stderr]     Checking jpng v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/lib.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 | /         self.image
[INFO] [stderr] 69 | |             .to_rgba()
[INFO] [stderr] 70 | |             .enumerate_pixels()
[INFO] [stderr] 71 | |             .zip(luma.pixels())
[INFO] [stderr] ...  |
[INFO] [stderr] 76 | |                     });
[INFO] [stderr] 77 | |             }).collect::<()>();
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::iter::Iterator::collect` that must be used
[INFO] [stderr]   --> src/lib.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 | /         self.image
[INFO] [stderr] 69 | |             .to_rgba()
[INFO] [stderr] 70 | |             .enumerate_pixels()
[INFO] [stderr] 71 | |             .zip(luma.pixels())
[INFO] [stderr] ...  |
[INFO] [stderr] 76 | |                     });
[INFO] [stderr] 77 | |             }).collect::<()>();
[INFO] [stderr]    | |_______________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you really need to exhaust the iterator, consider `.for_each(drop)` instead
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.29s
[INFO] running `"docker" "inspect" "33658d9473b7b21ef16835e2fe66999c240ac436f44df568f3fa6c30d77b68b7"`
[INFO] running `"docker" "rm" "-f" "33658d9473b7b21ef16835e2fe66999c240ac436f44df568f3fa6c30d77b68b7"`
[INFO] [stdout] 33658d9473b7b21ef16835e2fe66999c240ac436f44df568f3fa6c30d77b68b7