src/test/ui/issue-18986.rs

// aux-build:use_from_trait_xc.rs

extern crate use_from_trait_xc;
pub use use_from_trait_xc::Trait;

fn main() {
    match () {
        Trait { x: 42 } => () //~ ERROR expected struct, variant or union type, found trait `Trait`
    }
}