[INFO] crate workctl 0.1.1 is already in cache
[INFO] extracting crate workctl 0.1.1 into work/ex/clippy-test-run/sources/stable/reg/workctl/0.1.1
[INFO] extracting crate workctl 0.1.1 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/workctl/0.1.1
[INFO] validating manifest of workctl-0.1.1 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 workctl-0.1.1 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 workctl-0.1.1
[INFO] finished frobbing workctl-0.1.1
[INFO] frobbed toml for workctl-0.1.1 written to work/ex/clippy-test-run/sources/stable/reg/workctl/0.1.1/Cargo.toml
[INFO] started frobbing workctl-0.1.1
[INFO] finished frobbing workctl-0.1.1
[INFO] frobbed toml for workctl-0.1.1 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/workctl/0.1.1/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 workctl-0.1.1 against stable for clippy-test-run
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/clippy-test-run/worker-1/stable:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/clippy-test-run/sources/stable/reg/workctl/0.1.1:/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] 9086bd49e0ea7c4f34c702e932f48d3872adb73d8a22e6334c6d7df6446664e0
[INFO] running `"docker" "start" "-a" "9086bd49e0ea7c4f34c702e932f48d3872adb73d8a22e6334c6d7df6446664e0"`
[INFO] [stderr]     Checking workctl v0.1.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unneeded return statement
[INFO] [stderr]    --> src/work_queue.rs:151:9
[INFO] [stderr]     |
[INFO] [stderr] 151 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/sync_flag.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     return (tx, rx);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(tx, rx)`
[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/work_queue.rs:151:9
[INFO] [stderr]     |
[INFO] [stderr] 151 |         return None;
[INFO] [stderr]     |         ^^^^^^^^^^^^ help: remove `return` as shown: `None`
[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/sync_flag.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     return (tx, rx);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^ help: remove `return` as shown: `(tx, rx)`
[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: item `work_queue::WorkQueue<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/work_queue.rs:56:1
[INFO] [stderr]     |
[INFO] [stderr] 56  | / impl<T: Send> WorkQueue<T> {
[INFO] [stderr] 57  | |     /// Creates a new, empty WorkQueue with the default capacity.
[INFO] [stderr] 58  | |     pub fn new() -> Self {
[INFO] [stderr] 59  | |         Self { inner: Arc::new(Mutex::new(VecDeque::new())) }
[INFO] [stderr] ...   |
[INFO] [stderr] 162 | |     }
[INFO] [stderr] 163 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `work_queue::WorkQueue<T>`
[INFO] [stderr]   --> src/work_queue.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 | /     pub fn new() -> Self {
[INFO] [stderr] 59 | |         Self { inner: Arc::new(Mutex::new(VecDeque::new())) }
[INFO] [stderr] 60 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 52 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicBool instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]    --> src/sync_flag.rs:103:26
[INFO] [stderr]     |
[INFO] [stderr] 103 |     let state = Arc::new(Mutex::new(initial_state));
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::mutex_atomic)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: item `work_queue::WorkQueue<T>` has a public `len` method but no corresponding `is_empty` method
[INFO] [stderr]    --> src/work_queue.rs:56:1
[INFO] [stderr]     |
[INFO] [stderr] 56  | / impl<T: Send> WorkQueue<T> {
[INFO] [stderr] 57  | |     /// Creates a new, empty WorkQueue with the default capacity.
[INFO] [stderr] 58  | |     pub fn new() -> Self {
[INFO] [stderr] 59  | |         Self { inner: Arc::new(Mutex::new(VecDeque::new())) }
[INFO] [stderr] ...   |
[INFO] [stderr] 162 | |     }
[INFO] [stderr] 163 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::len_without_is_empty)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#len_without_is_empty
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider deriving a `Default` implementation for `work_queue::WorkQueue<T>`
[INFO] [stderr]   --> src/work_queue.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 | /     pub fn new() -> Self {
[INFO] [stderr] 59 | |         Self { inner: Arc::new(Mutex::new(VecDeque::new())) }
[INFO] [stderr] 60 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default_derive)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default_derive
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 52 | #[derive(Default)]
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicBool instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]    --> src/sync_flag.rs:103:26
[INFO] [stderr]     |
[INFO] [stderr] 103 |     let state = Arc::new(Mutex::new(initial_state));
[INFO] [stderr]     |                          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(clippy::mutex_atomic)] on by default
[INFO] [stderr]     = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.94s
[INFO] running `"docker" "inspect" "9086bd49e0ea7c4f34c702e932f48d3872adb73d8a22e6334c6d7df6446664e0"`
[INFO] running `"docker" "rm" "-f" "9086bd49e0ea7c4f34c702e932f48d3872adb73d8a22e6334c6d7df6446664e0"`
[INFO] [stdout] 9086bd49e0ea7c4f34c702e932f48d3872adb73d8a22e6334c6d7df6446664e0