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error[E0308]: method not compatible with trait
--> $DIR/issue-37884.rs:6:5
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LL | fn next(&'a mut self) -> Option<Self::Item>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime mismatch
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= note: expected signature `fn(&mut RepeatMut<'a, T>) -> Option<_>`
found signature `fn(&'a mut RepeatMut<'a, T>) -> Option<_>`
note: the anonymous lifetime as defined here...
--> $DIR/issue-37884.rs:6:5
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LL | fn next(&'a mut self) -> Option<Self::Item>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...does not necessarily outlive the lifetime `'a` as defined here
--> $DIR/issue-37884.rs:3:6
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LL | impl<'a, T: 'a> Iterator for RepeatMut<'a, T> {
| ^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.
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