src/test/ui/type-alias-impl-trait/issue-57611-trait-alias.stderr

   1 error[E0308]: mismatched types
   2   --> $DIR/issue-57611-trait-alias.rs:21:9
   3    |
   4 LL |         |x| x
   5    |         ^^^^^ one type is more general than the other
   6    |
   7    = note: expected trait `for<'r> Fn<(&'r X,)>`
   8               found trait `Fn<(&X,)>`
   9 note: this closure does not fulfill the lifetime requirements
  10   --> $DIR/issue-57611-trait-alias.rs:21:9
  11    |
  12 LL |         |x| x
  13    |         ^^^^^
  14
  15 error: implementation of `FnOnce` is not general enough
  16   --> $DIR/issue-57611-trait-alias.rs:21:9
  17    |
  18 LL |         |x| x
  19    |         ^^^^^ implementation of `FnOnce` is not general enough
  20    |
  21    = note: closure with signature `fn(&'2 X) -> &X` must implement `FnOnce<(&'1 X,)>`, for any lifetime `'1`...
  22    = note: ...but it actually implements `FnOnce<(&'2 X,)>`, for some specific lifetime `'2`
  23
  24 error: aborting due to 2 previous errors
  25
  26 For more information about this error, try `rustc --explain E0308`.