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error[E0792]: expected generic lifetime parameter, found `'_`
--> $DIR/impl-fn-predefined-lifetimes.rs:8:9
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LL | fn a<'a>() -> impl Fn(&'a u8) -> (impl Debug + '_) {
| -- this generic parameter must be used with a generic lifetime parameter
LL | |x| x
| ^
error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0792`.
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