[INFO] updating cached repository sebastianpfluegelmeier/sudoku_checker
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/sebastianpfluegelmeier/sudoku_checker
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/sebastianpfluegelmeier/sudoku_checker" "work/ex/clippy-test-run/sources/stable/gh/sebastianpfluegelmeier/sudoku_checker"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/sebastianpfluegelmeier/sudoku_checker'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/sebastianpfluegelmeier/sudoku_checker" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sebastianpfluegelmeier/sudoku_checker"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sebastianpfluegelmeier/sudoku_checker'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 4ba5e26c8539bab8587e2a362a6012bdbd4b0326
[INFO] sha for GitHub repo sebastianpfluegelmeier/sudoku_checker: 4ba5e26c8539bab8587e2a362a6012bdbd4b0326
[INFO] validating manifest of sebastianpfluegelmeier/sudoku_checker 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 sebastianpfluegelmeier/sudoku_checker 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 sebastianpfluegelmeier/sudoku_checker
[INFO] finished frobbing sebastianpfluegelmeier/sudoku_checker
[INFO] frobbed toml for sebastianpfluegelmeier/sudoku_checker written to work/ex/clippy-test-run/sources/stable/gh/sebastianpfluegelmeier/sudoku_checker/Cargo.toml
[INFO] started frobbing sebastianpfluegelmeier/sudoku_checker
[INFO] finished frobbing sebastianpfluegelmeier/sudoku_checker
[INFO] frobbed toml for sebastianpfluegelmeier/sudoku_checker written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sebastianpfluegelmeier/sudoku_checker/Cargo.toml
[INFO] crate sebastianpfluegelmeier/sudoku_checker has a lockfile. skipping
[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 sebastianpfluegelmeier/sudoku_checker against stable+rustflags=-Dclippy::into_iter_on_array for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-6/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/sebastianpfluegelmeier/sudoku_checker:/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 -Dclippy::into_iter_on_array" "-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] 09bbf24a85001445330f5be5b43563c38c7c0130bde4eb020bf2dc2251d060fe
[INFO] running `"docker" "start" "-a" "09bbf24a85001445330f5be5b43563c38c7c0130bde4eb020bf2dc2251d060fe"`
[INFO] [stderr]     Checking rpds v0.4.0
[INFO] [stderr]     Checking sudoku_solver v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     return rows_valid && cols_valid && blocks_valid;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `rows_valid && cols_valid && blocks_valid`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     return has_duplicate;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `has_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     return has_duplicate;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `has_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     return has_duplicate;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `has_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     return rows_valid && cols_valid && blocks_valid;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `rows_valid && cols_valid && blocks_valid`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::needless_return)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:43:5
[INFO] [stderr]    |
[INFO] [stderr] 43 |     return has_duplicate;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `has_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     return has_duplicate;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `has_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]   --> src/main.rs:81:5
[INFO] [stderr]    |
[INFO] [stderr] 81 |     return has_duplicate;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ help: remove `return` as shown: `has_duplicate`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_return
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.51s
[INFO] running `"docker" "inspect" "09bbf24a85001445330f5be5b43563c38c7c0130bde4eb020bf2dc2251d060fe"`
[INFO] running `"docker" "rm" "-f" "09bbf24a85001445330f5be5b43563c38c7c0130bde4eb020bf2dc2251d060fe"`
[INFO] [stdout] 09bbf24a85001445330f5be5b43563c38c7c0130bde4eb020bf2dc2251d060fe