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error[E0393]: the type parameter `T` must be explicitly specified
--> $DIR/issue-22370.rs:3:14
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LL | trait A<T=Self> {}
| --------------- type parameter `T` must be specified for this
LL |
LL | fn f(a: &dyn A) {}
| ^ help: set the type parameter to the desired type: `A<T>`
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= note: because of the default `Self` reference, type parameters must be specified on object types
error: aborting due to previous error
For more information about this error, try `rustc --explain E0393`.
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