error[E0532]: expected tuple struct or tuple variant, found constant `C1` --> $DIR/issue-28992-empty.rs:13:12 | LL | if let C1(..) = 0 {} | ^^ not a tuple struct or tuple variant error[E0164]: expected tuple struct or tuple variant, found associated constant `S::C2` --> $DIR/issue-28992-empty.rs:14:12 | LL | if let S::C2(..) = 0 {} | ^^^^^^^^^ not a tuple variant or struct error: aborting due to 2 previous errors Some errors have detailed explanations: E0164, E0532. For more information about an error, try `rustc --explain E0164`.