[INFO] updating cached repository jzinedine/rust_playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jzinedine/rust_playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jzinedine/rust_playground" "work/ex/clippy-test-run/sources/stable/gh/jzinedine/rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable/gh/jzinedine/rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jzinedine/rust_playground" "work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jzinedine/rust_playground"`
[INFO] [stderr] Cloning into 'work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jzinedine/rust_playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 002ba41f1f0aa77940580583d34b36210029890b
[INFO] sha for GitHub repo jzinedine/rust_playground: 002ba41f1f0aa77940580583d34b36210029890b
[INFO] validating manifest of jzinedine/rust_playground 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 jzinedine/rust_playground 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 jzinedine/rust_playground
[INFO] finished frobbing jzinedine/rust_playground
[INFO] frobbed toml for jzinedine/rust_playground written to work/ex/clippy-test-run/sources/stable/gh/jzinedine/rust_playground/Cargo.toml
[INFO] started frobbing jzinedine/rust_playground
[INFO] finished frobbing jzinedine/rust_playground
[INFO] frobbed toml for jzinedine/rust_playground written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/gh/jzinedine/rust_playground/Cargo.toml
[INFO] crate jzinedine/rust_playground 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 jzinedine/rust_playground against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-0/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/gh/jzinedine/rust_playground:/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] 700c422b3730a0a794c4006d9d6db0fb1fc64945bef592a193a10e2cb7863dc2
[INFO] running `"docker" "start" "-a" "700c422b3730a0a794c4006d9d6db0fb1fc64945bef592a193a10e2cb7863dc2"`
[INFO] [stderr]     Checking hanoi_challenge v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:20:39
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn check_invariant(arg: &mut Vec<u8>) -> () {
[INFO] [stderr]    |                                       ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:28:101
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn solve(source: &mut Vec<u8>, destination: &mut Vec<u8>, aux: &mut Vec<u8>, n: u8, moves: &mut u8) -> () {
[INFO] [stderr]    |                                                                                                     ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         *moves = *moves + 3
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `*moves += 3`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         *moves = *moves + 1;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `*moves += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:20:39
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn check_invariant(arg: &mut Vec<u8>) -> () {
[INFO] [stderr]    |                                       ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::unused_unit)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: unneeded unit return type
[INFO] [stderr]   --> src/main.rs:28:101
[INFO] [stderr]    |
[INFO] [stderr] 28 | fn solve(source: &mut Vec<u8>, destination: &mut Vec<u8>, aux: &mut Vec<u8>, n: u8, moves: &mut u8) -> () {
[INFO] [stderr]    |                                                                                                     ^^^^^ help: remove the `-> ()`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_unit
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         *moves = *moves + 3
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `*moves += 3`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::assign_op_pattern)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr] warning: manual implementation of an assign operation
[INFO] [stderr]   --> src/main.rs:40:9
[INFO] [stderr]    |
[INFO] [stderr] 40 |         *moves = *moves + 1;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^ help: replace it with: `*moves += 1`
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assign_op_pattern
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "700c422b3730a0a794c4006d9d6db0fb1fc64945bef592a193a10e2cb7863dc2"`
[INFO] running `"docker" "rm" "-f" "700c422b3730a0a794c4006d9d6db0fb1fc64945bef592a193a10e2cb7863dc2"`
[INFO] [stdout] 700c422b3730a0a794c4006d9d6db0fb1fc64945bef592a193a10e2cb7863dc2