gcc/testsuite/rust/compile/issues/2906.rs

// { dg-warning "field is never read: .a." "" { target *-*-* } .-1 }
#![feature(no_core)]
#![no_core]

struct Foo { a: i32 }

fn main() {
    let a = Foo { a: 15 };
    
    match a {
        b => { }
    }
}