| #![feature(sized_hierarchy, trait_alias)] |
| use std::marker::MetaSized; |
| |
| // Trait aliases also have implicit `MetaSized` bounds, like traits. These are filtered out during |
| // elaboration of trait aliases when lowering `dyn TraitAlias` - however, if the user explicitly |
| // wrote `MetaSized` in the `dyn Trait` then that should still be an error so as not to accidentally |
| // accept this going forwards. |
| |
| trait Qux = Clone; |
| |
| type Foo = dyn Qux + MetaSized; |
| //~^ ERROR: only auto traits can be used as additional traits in a trait object |
| |
| type Bar = dyn Qux; |
| |
| fn main() {} |
