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error[E0277]: the size for values of type `(dyn Trait + 'static)` cannot be known at compilation time
--> $DIR/issue-65673.rs:9:16
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LL | trait WithType {
| -------- required by a bound in this
LL | type Ctx;
| --------- required by this bound in `WithType`
...
LL | type Ctx = dyn Alias<T>;
| ^^^^^^^^^^^^ doesn't have a size known at compile-time
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= help: the trait `std::marker::Sized` is not implemented for `(dyn Trait + 'static)`
= note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
error: aborting due to previous error
For more information about this error, try `rustc --explain E0277`.
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