t.Fatalf("makeOnePass succeeded; wanted nil")
	}
}

// Check that the same machine can be used with the standard matcher
// and then the backtracker when there are no captures.
func TestSwitchBacktrack(t *testing.T) {
	re := MustCompile(`a|b`)
	long := make([]byte, maxBacktrackVector+1)

	// The following sequence of Match calls used to panic. See issue #10319.
	re.Match(long)     // triggers standard matcher