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error[E0038]: the trait alias `BB` is not dyn compatible
--> $DIR/self-in-const-generics.rs:9:16
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LL | fn foo(x: &dyn BB) {}
| ^^ `BB` is not dyn compatible
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note: for a trait to be dyn compatible it needs to allow building a vtable
for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
--> $DIR/self-in-const-generics.rs:7:12
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LL | trait BB = Bar<{ 2 + 1 }>;
| -- ^^^^^^^^^^^^^^ ...because it uses `Self` as a type parameter
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| this trait is not dyn compatible...
help: consider using an opaque type instead
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LL - fn foo(x: &dyn BB) {}
LL + fn foo(x: &impl BB) {}
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0038`.
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