1 error[E0107]: missing generics for associated type `TestMut::Output`
2 --> $DIR/issue-80433.rs:23:47
4 LL | fn test_simpler<'a>(dst: &'a mut impl TestMut<Output = &'a mut f32>)
5 | ^^^^^^ expected 1 lifetime argument
7 note: associated type defined here, with 1 lifetime parameter: `'a`
8 --> $DIR/issue-80433.rs:9:10
12 help: add missing lifetime argument
14 LL | fn test_simpler<'a>(dst: &'a mut impl TestMut<Output<'a> = &'a mut f32>)
17 error: aborting due to previous error
19 For more information about this error, try `rustc --explain E0107`.