#zig build-obj {
--name test -fno-emit-bin
-Mroot=test.zig
#}

#write test.zig {
const Letter = enum {
    A,
    B,
    C,
};
const Payload = extern union(Letter) {
    A: i32,
    B: f64,
    C: bool,
};
export fn entry() void {
    const a: Payload = .{ .A = 1234 };
    _ = a;
}
#}
#update
#check errors {
test.zig:6:30: error: extern union does not support enum tag type
#}
