1 error[E0308]: mismatched types
2 --> $DIR/issue-79187.rs:5:5
5 | ^^^^^^^^ one type is more general than the other
7 = note: expected trait `for<'a> FnOnce<(&'a u32,)>`
8 found trait `FnOnce<(&u32,)>`
9 note: this closure does not fulfill the lifetime requirements
10 --> $DIR/issue-79187.rs:4:13
14 note: the lifetime requirement is introduced here
15 --> $DIR/issue-79187.rs:1:18
17 LL | fn thing(x: impl FnOnce(&u32)) {}
20 error: implementation of `FnOnce` is not general enough
21 --> $DIR/issue-79187.rs:5:5
24 | ^^^^^^^^ implementation of `FnOnce` is not general enough
26 = note: closure with signature `fn(&'2 u32)` must implement `FnOnce<(&'1 u32,)>`, for any lifetime `'1`...
27 = note: ...but it actually implements `FnOnce<(&'2 u32,)>`, for some specific lifetime `'2`
29 error: aborting due to 2 previous errors
31 For more information about this error, try `rustc --explain E0308`.