error: found `Rc<Mutex<_>>`. Consider using `Rc<RefCell<_>>` or `Arc<Mutex<_>>` instead
  --> $DIR/rc_mutex.rs:8:10
   |
LL |     foo: Rc<Mutex<i32>>,
   |          ^^^^^^^^^^^^^^
   |
   = note: `-D clippy::rc-mutex` implied by `-D warnings`

error: found `Rc<Mutex<_>>`. Consider using `Rc<RefCell<_>>` or `Arc<Mutex<_>>` instead
  --> $DIR/rc_mutex.rs:20:22
   |
LL | pub fn test1<T>(foo: Rc<Mutex<T>>) {}
   |                      ^^^^^^^^^^^^

error: found `Rc<Mutex<_>>`. Consider using `Rc<RefCell<_>>` or `Arc<Mutex<_>>` instead
  --> $DIR/rc_mutex.rs:22:19
   |
LL | pub fn test2(foo: Rc<Mutex<MyEnum>>) {}
   |                   ^^^^^^^^^^^^^^^^^

error: found `Rc<Mutex<_>>`. Consider using `Rc<RefCell<_>>` or `Arc<Mutex<_>>` instead
  --> $DIR/rc_mutex.rs:24:19
   |
LL | pub fn test3(foo: Rc<Mutex<SubT<usize>>>) {}
   |                   ^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 4 previous errors