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error: lifetime may not live long enough
--> $DIR/regions-creating-enums3.rs:7:5
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LL | fn mk_add_bad1<'a,'b>(x: &'a Ast<'a>, y: &'b Ast<'b>) -> Ast<'a> {
| -- -- lifetime `'b` defined here
| |
| lifetime `'a` defined here
LL | Ast::Add(x, y)
| ^^^^^^^^^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
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= help: consider adding the following bound: `'b: 'a`
error: aborting due to 1 previous error
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