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error[E0491]: in type `&'a &'b usize`, reference has a longer lifetime than the data it references
--> $DIR/regions-free-region-ordering-callee-4.rs:5:68
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LL | fn ordering4<'a, 'b, F>(a: &'a usize, b: &'b usize, x: F) where F: FnOnce(&'a &'b usize) {
| ^^^^^^^^^^^^^^^^^^^^^
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note: the pointer is valid for the lifetime `'a` as defined here
--> $DIR/regions-free-region-ordering-callee-4.rs:5:14
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LL | fn ordering4<'a, 'b, F>(a: &'a usize, b: &'b usize, x: F) where F: FnOnce(&'a &'b usize) {
| ^^
note: but the referenced data is only valid for the lifetime `'b` as defined here
--> $DIR/regions-free-region-ordering-callee-4.rs:5:18
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LL | fn ordering4<'a, 'b, F>(a: &'a usize, b: &'b usize, x: F) where F: FnOnce(&'a &'b usize) {
| ^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0491`.
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