I am seeing this warning a lot when parsing an inferred grammar with Ace:
WARNING: grammar rule `n14-bottom-coord’ is loopy
WARNING: edge #835 [n14-bottom-coord] == edge #593 [n14-bottom-coord]
It’s coming from one of the coordination rules. What does this warning mean practically speaking? Is the sentence not parsing because the rule is loopy and it runs out of edges, or is it just telling me that I have a bad/inefficient rule? Or something else?