[INFO] crate wait_group 0.1.4 is already in cache
[INFO] extracting crate wait_group 0.1.4 into work/ex/clippy-test-run/sources/stable/reg/wait_group/0.1.4
[INFO] extracting crate wait_group 0.1.4 into work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/wait_group/0.1.4
[INFO] validating manifest of wait_group-0.1.4 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 wait_group-0.1.4 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 wait_group-0.1.4
[INFO] finished frobbing wait_group-0.1.4
[INFO] frobbed toml for wait_group-0.1.4 written to work/ex/clippy-test-run/sources/stable/reg/wait_group/0.1.4/Cargo.toml
[INFO] started frobbing wait_group-0.1.4
[INFO] finished frobbing wait_group-0.1.4
[INFO] frobbed toml for wait_group-0.1.4 written to work/ex/clippy-test-run/sources/stable+rustflags=-Dclippy%3A%3Ainto_iter_on_array/reg/wait_group/0.1.4/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 wait_group-0.1.4 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/wait_group/0.1.4:/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] 0bcfa962c38f4fc2219f36f9bf07f63b51df1414c2369ea41a46a0bd8acf253a
[INFO] running `"docker" "start" "-a" "0bcfa962c38f4fc2219f36f9bf07f63b51df1414c2369ea41a46a0bd8acf253a"`
[INFO] [stderr]     Checking wait_group v0.1.4 (/opt/crater/workdir)
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `WaitGroup`
[INFO] [stderr]   --> src/lib.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | /     pub fn new() -> WaitGroup {
[INFO] [stderr] 38 | |         WaitGroup(Arc::new(WaitGroupImpl {
[INFO] [stderr] 39 | |             cond: Condvar::new(),
[INFO] [stderr] 40 | |             count: Mutex::new(0),
[INFO] [stderr] 41 | |         }))
[INFO] [stderr] 42 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 36 | impl Default for WaitGroup {
[INFO] [stderr] 37 |     fn default() -> Self {
[INFO] [stderr] 38 |         Self::new()
[INFO] [stderr] 39 |     }
[INFO] [stderr] 40 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:40:20
[INFO] [stderr]    |
[INFO] [stderr] 40 |             count: Mutex::new(0),
[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: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:45:25
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let mut count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:51:25
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:58:25
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let mut count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: you should consider adding a `Default` implementation for `WaitGroup`
[INFO] [stderr]   --> src/lib.rs:37:5
[INFO] [stderr]    |
[INFO] [stderr] 37 | /     pub fn new() -> WaitGroup {
[INFO] [stderr] 38 | |         WaitGroup(Arc::new(WaitGroupImpl {
[INFO] [stderr] 39 | |             cond: Condvar::new(),
[INFO] [stderr] 40 | |             count: Mutex::new(0),
[INFO] [stderr] 41 | |         }))
[INFO] [stderr] 42 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(clippy::new_without_default)] on by default
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#new_without_default
[INFO] [stderr] help: try this
[INFO] [stderr]    |
[INFO] [stderr] 36 | impl Default for WaitGroup {
[INFO] [stderr] 37 |     fn default() -> Self {
[INFO] [stderr] 38 |         Self::new()
[INFO] [stderr] 39 |     }
[INFO] [stderr] 40 | }
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:40:20
[INFO] [stderr]    |
[INFO] [stderr] 40 |             count: Mutex::new(0),
[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: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:45:25
[INFO] [stderr]    |
[INFO] [stderr] 45 |         let mut count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:51:25
[INFO] [stderr]    |
[INFO] [stderr] 51 |         let mut count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:58:25
[INFO] [stderr]    |
[INFO] [stderr] 58 |         let mut count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                         ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#mutex_atomic
[INFO] [stderr] 
[INFO] [stderr] warning: Consider using an AtomicUsize instead of a Mutex here. If you just want the locking behaviour and not the internal type, consider using Mutex<()>.
[INFO] [stderr]   --> src/lib.rs:73:21
[INFO] [stderr]    |
[INFO] [stderr] 73 |         let count = self.0.count.lock().unwrap();
[INFO] [stderr]    |                     ^^^^^^^^^^^^
[INFO] [stderr]    |
[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 0.69s
[INFO] running `"docker" "inspect" "0bcfa962c38f4fc2219f36f9bf07f63b51df1414c2369ea41a46a0bd8acf253a"`
[INFO] running `"docker" "rm" "-f" "0bcfa962c38f4fc2219f36f9bf07f63b51df1414c2369ea41a46a0bd8acf253a"`
[INFO] [stdout] 0bcfa962c38f4fc2219f36f9bf07f63b51df1414c2369ea41a46a0bd8acf253a