[INFO] crate libimagerror 0.9.0 is already in cache
[INFO] extracting crate libimagerror 0.9.0 into work/ex/clippy-test-run/sources/stable/reg/libimagerror/0.9.0
[INFO] extracting crate libimagerror 0.9.0 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/libimagerror/0.9.0
[INFO] validating manifest of libimagerror-0.9.0 on toolchain stable
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of libimagerror-0.9.0 on toolchain stable+rustflags=-Dclippy::into_iter_on_array
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing libimagerror-0.9.0
[INFO] finished frobbing libimagerror-0.9.0
[INFO] frobbed toml for libimagerror-0.9.0 written to work/ex/clippy-test-run/sources/stable/reg/libimagerror/0.9.0/Cargo.toml
[INFO] started frobbing libimagerror-0.9.0
[INFO] finished frobbing libimagerror-0.9.0
[INFO] frobbed toml for libimagerror-0.9.0 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/libimagerror/0.9.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+stable" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] linting libimagerror-0.9.0 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-5/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/libimagerror/0.9.0:/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" "+stable" "clippy" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 75da07b2d9ee8be1ba089b68b9a54851316bc112d9e97f1bbde63a82faa65720
[INFO] running `"docker" "start" "-a" "75da07b2d9ee8be1ba089b68b9a54851316bc112d9e97f1bbde63a82faa65720"`
[INFO] [stderr]     Checking libimagerror v0.9.0 (/opt/crater/workdir)
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let _ = writeln!(fmt, "{}: {}", Red.blink().paint("ERROR[   0]"), self.0)?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 | /                 let _ = writeln!(fmt,
[INFO] [stderr] 43 | |                                  "{prefix}: {error}",
[INFO] [stderr] 44 | |                                  prefix = Red.blink().paint(format!("ERROR[{:>4}]", i)),
[INFO] [stderr] 45 | |                                  error = cause)?;
[INFO] [stderr]    | |_________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let _ = writeln!(fmt, "{}", Red.paint("--- BACKTRACE ---"))?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let _ = writeln!(fmt, "{:?}", self.0.backtrace())?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |         let _ = writeln!(fmt, "{}: {}", Red.blink().paint("ERROR[   0]"), self.0)?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::let_unit_value)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:42:17
[INFO] [stderr]    |
[INFO] [stderr] 42 | /                 let _ = writeln!(fmt,
[INFO] [stderr] 43 | |                                  "{prefix}: {error}",
[INFO] [stderr] 44 | |                                  prefix = Red.blink().paint(format!("ERROR[{:>4}]", i)),
[INFO] [stderr] 45 | |                                  error = cause)?;
[INFO] [stderr]    | |_________________________________________________^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:49:9
[INFO] [stderr]    |
[INFO] [stderr] 49 |         let _ = writeln!(fmt, "{}", Red.paint("--- BACKTRACE ---"))?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr] warning: this let-binding has unit value. Consider omitting `let _ =`
[INFO] [stderr]   --> src/trace.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |         let _ = writeln!(fmt, "{:?}", self.0.backtrace())?;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#let_unit_value
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `"docker" "inspect" "75da07b2d9ee8be1ba089b68b9a54851316bc112d9e97f1bbde63a82faa65720"`
[INFO] running `"docker" "rm" "-f" "75da07b2d9ee8be1ba089b68b9a54851316bc112d9e97f1bbde63a82faa65720"`
[INFO] [stdout] 75da07b2d9ee8be1ba089b68b9a54851316bc112d9e97f1bbde63a82faa65720