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error[E0277]: the size for values of type `Self` cannot be known at compilation time
--> $DIR/issue-27078.rs:5:12
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LL | fn foo(self) -> &'static i32 {
| ^^^^ doesn't have a size known at compile-time
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= help: the trait `std::marker::Sized` is not implemented for `Self`
= note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
= help: consider adding a `where Self: std::marker::Sized` bound
= note: all local variables must have a statically known size
= help: unsized locals are gated as an unstable feature
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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