[INFO] crate img 0.1.0 is already in cache
[INFO] checking img-0.1.0 against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] extracting crate img 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate img 0.1.0 on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate img 0.1.0
[INFO] finished tweaking crates.io crate img 0.1.0
[INFO] tweaked toml for crates.io crate img 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "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] 65a32ed6bd5d40abf802e66596d76b48fc7cfb63920a51be074fc781ba7e2cd4
[INFO] running `"docker" "start" "-a" "65a32ed6bd5d40abf802e66596d76b48fc7cfb63920a51be074fc781ba7e2cd4"`
[INFO] [stderr]     Checking img v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/scalar/mod.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     a + b;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused comparison that must be used
[INFO] [stderr]   --> src/scalar/mod.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 |     a == b;
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: where clauses are not enforced in type aliases
[INFO] [stderr]   --> src/image/impl_buffer.rs:18:39
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub type ImageBufferVal<PixelP> where PixelP: Pixel = ImageVal<ImageBuffer<PixelP>>;
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stderr] help: the clause will not be checked when the type alias is used, and should be removed
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub type ImageBufferVal<PixelP>  = ImageVal<ImageBuffer<PixelP>>;
[INFO] [stderr]    |                                --
[INFO] [stderr] 
[INFO] [stderr] warning: where clauses are not enforced in type aliases
[INFO] [stderr]   --> src/image/impl_buffer.rs:18:39
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub type ImageBufferVal<PixelP> where PixelP: Pixel = ImageVal<ImageBuffer<PixelP>>;
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(type_alias_bounds)]` on by default
[INFO] [stderr] help: the clause will not be checked when the type alias is used, and should be removed
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub type ImageBufferVal<PixelP>  = ImageVal<ImageBuffer<PixelP>>;
[INFO] [stderr]    |                                --
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `"docker" "inspect" "65a32ed6bd5d40abf802e66596d76b48fc7cfb63920a51be074fc781ba7e2cd4"`
[INFO] running `"docker" "rm" "-f" "65a32ed6bd5d40abf802e66596d76b48fc7cfb63920a51be074fc781ba7e2cd4"`
[INFO] [stdout] 65a32ed6bd5d40abf802e66596d76b48fc7cfb63920a51be074fc781ba7e2cd4