1 #![feature(negative_impls)]
2 #![feature(rustc_attrs)]
3 #![feature(trait_alias)]
12 #[rustc_strict_coherence]
13 impl<T: AB> C for T {}
14 #[rustc_strict_coherence]
16 //~^ ERROR: conflicting implementations of trait `C` for type `u32` [E0119]
17 // FIXME this should work, we should implement an `assemble_neg_candidates` fn