error: atomic compare-exchange failure ordering ('.seq_cst') cannot be stronger than the success ordering ('.relaxed')
  --> examples/1186-diagnostics-atomic-cas-ordering.sx:11:50
   |
11 |     _ := atomic_cmpxchg(i64, @n, 0, 1, .relaxed, .seq_cst);
   |                                                  ^^^^^^^^
