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error[E0746]: return type cannot have an unboxed trait object
--> $DIR/issue-18107.rs:4:5
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LL | dyn AbstractRenderer
| ^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
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help: consider returning an `impl Trait` instead of a `dyn Trait`
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LL | impl AbstractRenderer
| ~~~~
help: alternatively, box the return type, and wrap all of the returned values in `Box::new`
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LL ~ Box<dyn AbstractRenderer>
LL |
LL | {
LL | match 0 {
LL ~ _ => Box::new(unimplemented!())
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0746`.
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