fix NPE #2423
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fix NPE #2423
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@ericvergnaud can you add a test for this so other runtimes can be validated against the desired behavior? |
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fix NPE encountered with a left-recursive grammar such as:
stuff:
stuff1 # Stuff1
| stuff2 # Stuff2
| (stuff1 | stuff2) stuff3
;
Does not happen in Java because null keys are allowed