if err != nil {
				t.Error(err)
			}
		})
	}
}

// doDefaultTest should be run before there have been any calls to the
// top-level math/rand functions. Make sure that we can make concurrent
// calls to top-level functions and to Seed without any duplicate values.
// This will also give the race detector a change to report any problems.
func doDefaultTest(t *testing.T, v string) {
	code, err := strconv.Atoi(v)
	if err != nil {