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