1 error[E0308]: method not compatible with trait
2 --> $DIR/issue-37884.rs:6:5
4 LL | / fn next(&'a mut self) -> Option<Self::Item>
8 LL | | Some(&mut self.0)
10 | |_____^ lifetime mismatch
12 = note: expected fn pointer `fn(&mut RepeatMut<'a, T>) -> Option<_>`
13 found fn pointer `fn(&'a mut RepeatMut<'a, T>) -> Option<_>`
14 note: the anonymous lifetime #1 defined on the method body at 6:5...
15 --> $DIR/issue-37884.rs:6:5
17 LL | fn next(&'a mut self) -> Option<Self::Item>
18 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
19 note: ...does not necessarily outlive the lifetime `'a` as defined on the impl at 3:6
20 --> $DIR/issue-37884.rs:3:6
22 LL | impl<'a, T: 'a> Iterator for RepeatMut<'a, T> {
25 error: aborting due to previous error
27 For more information about this error, try `rustc --explain E0308`.