src/test/ui/issues/issue-57843.stderr

   1 error[E0308]: mismatched types
   2   --> $DIR/issue-57843.rs:23:9
   3    |
   4 LL |     Foo(Box::new(|_| ()));
   5    |         ^^^^^^^^^^^^^^^^ one type is more general than the other
   6    |
   7    = note: expected type `FnOnce<(&'a bool,)>`
   8               found type `FnOnce<(&bool,)>`
   9
  10 error: aborting due to previous error
  11
  12 For more information about this error, try `rustc --explain E0308`.