1export fn entry() void {
 2    const E = enum(u8) {
 3        a,
 4        b,
 5        c,
 6        d,
 7    };
 8    var x: E = .a;
 9    _ = @atomicRmw(E, &x, .Add, .b, .seq_cst);
10}
11
12// error
13//
14// :9:28: error: @atomicRmw with enum only allowed with .Xchg