error: lifetime may not live long enough
  --> $DIR/issue-100690.rs:34:9
   |
LL | impl<'a, T: 'a> Handle<'a, T, UIView<'a, T>, Result<(), io::Error>> for TUIHandle<T> {
   |      -- lifetime `'a` defined here
...
LL |         real_dispatch(f)
   |         ^^^^^^^^^^^^^^^^ requires that `'a` must outlive `'static`
   |
note: due to current limitations in the borrow checker, this implies a `'static` lifetime
  --> $DIR/issue-100690.rs:8:8
   |
LL |     F: FnOnce(&mut UIView<T>) -> Result<(), io::Error> + Send + 'static,
   |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: implementation of `FnOnce` is not general enough
  --> $DIR/issue-100690.rs:34:9
   |
LL |         real_dispatch(f)
   |         ^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough
   |
   = note: `F` must implement `FnOnce<(&mut UIView<'0, T>,)>`, for any lifetime `'0`...
   = note: ...but it actually implements `FnOnce<(&mut UIView<'1, T>,)>`, for some specific lifetime `'1`

error[E0308]: mismatched types
  --> $DIR/issue-100690.rs:34:9
   |
LL |         real_dispatch(f)
   |         ^^^^^^^^^^^^^^^^ one type is more general than the other
   |
   = note: expected associated type `<F as FnOnce<(&mut UIView<'_, T>,)>>::Output`
              found associated type `<F as FnOnce<(&mut UIView<'_, T>,)>>::Output`
note: the lifetime requirement is introduced here
  --> $DIR/issue-100690.rs:8:34
   |
LL |     F: FnOnce(&mut UIView<T>) -> Result<(), io::Error> + Send + 'static,
   |                                  ^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0308`.