E0311.stderr

error[E0311]: the parameter type `U` may not live long enough
  --> $DIR/E0311.rs:13:21
   |
LL |         let u_ref = self.borrow_mut();
   |                     ^^^^^^^^^^^^^^^^^
   |
note: the parameter type `U` must be valid for the anonymous lifetime defined here...
  --> $DIR/E0311.rs:12:26
   |
LL |     fn nested_borrow_mut(&mut self) -> &mut V {
   |                          ^^^^^^^^^
note: ...so that the type `U` will meet its required lifetime bounds
  --> $DIR/E0311.rs:13:21
   |
LL |         let u_ref = self.borrow_mut();
   |                     ^^^^^^^^^^^^^^^^^
help: consider adding an explicit lifetime bound...
   |
LL |     U: BorrowMut<V> + 'a, // Error is caused by missing lifetime here
   |                     ++++

error[E0311]: the parameter type `U` may not live long enough
  --> $DIR/E0311.rs:14:9
   |
LL |         u_ref.borrow_mut()
   |         ^^^^^^^^^^^^^^^^^^
   |
note: the parameter type `U` must be valid for the anonymous lifetime defined here...
  --> $DIR/E0311.rs:12:26
   |
LL |     fn nested_borrow_mut(&mut self) -> &mut V {
   |                          ^^^^^^^^^
note: ...so that the type `U` will meet its required lifetime bounds
  --> $DIR/E0311.rs:14:9
   |
LL |         u_ref.borrow_mut()
   |         ^^^^^^^^^^^^^^^^^^
help: consider adding an explicit lifetime bound...
   |
LL |     U: BorrowMut<V> + 'a, // Error is caused by missing lifetime here
   |                     ++++

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0311`.