src/test/ui/structs/struct-variant-privacy.rs

mod foo {
    enum Bar {
        Baz { a: isize }
    }
}

fn f(b: foo::Bar) { //~ ERROR enum `Bar` is private
    match b {
        foo::Bar::Baz { a: _a } => {} //~ ERROR enum `Bar` is private
    }
}

fn main() {}