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error[E0277]: the size for values of type `Self` cannot be known at compilation time
--> $DIR/issue-27078.rs:3:12
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LL | fn foo(self) -> &'static i32 {
| ^^^^ doesn't have a size known at compile-time
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= help: unsized fn params are gated as an unstable feature
help: consider further restricting `Self`
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LL | fn foo(self) -> &'static i32 where Self: Sized {
| +++++++++++++++++
help: function arguments must have a statically known size, borrowed types always have a known size
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LL | fn foo(&self) -> &'static i32 {
| +
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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