const MultipleChoice = enum(u32) {
    A = 20,
    B = 40,
    C = 60,
    D = 1000,
    E = 60,
};
export fn entry() void {
    const x = MultipleChoice.C;
    _ = x;
}

// error
//
// :6:9: error: enum tag value '60' for field 'E' already taken
// :4:9: note: previous occurrence in field 'C'
