[antlr-interest] [3.0b4] StackOverflowError report

[Robert Baruch]

Hi all,

I have found a grammar which, although admittedly ridiculous,  
nevertheless passes through ANTLR but throws a StackOverflowError  
when parsing anything (in this case, the sentence "nn").

Is there something wrong with the grammar? ANTLR?

Thanks,

--Rob


grammar TestParser;
options { superClass = GeneratedParser; }
@parser::header {
   import grammatotron.*; }

start : r0 EOF ;
r0 : r1 r0  ;
r1 : N  ;


N : 'n';
V : 'v';

Exception in thread "main" java.lang.StackOverflowError
	at org.antlr.runtime.BaseRecognizer.combineFollows 
(BaseRecognizer.java:388)
	at org.antlr.runtime.BaseRecognizer.computeContextSensitiveRuleFOLLOW 
(BaseRecognizer.java:376)
	at org.antlr.runtime.BaseRecognizer.recoverFromMismatchedElement 
(BaseRecognizer.java:478)
	at org.antlr.runtime.BaseRecognizer.recoverFromMismatchedToken 
(BaseRecognizer.java:445)
	at org.antlr.runtime.BaseRecognizer.mismatch(BaseRecognizer.java:98)
	at org.antlr.runtime.BaseRecognizer.match(BaseRecognizer.java:80)
	at TestParser.r1(TestParser.java:92)
	at TestParser.r0(TestParser.java:63)
	at TestParser.r0(TestParser.java:67)
	at TestParser.r0(TestParser.java:67)
	at TestParser.r0(TestParser.java:67)
	at TestParser.r0(TestParser.java:67)
	at TestParser.r0(TestParser.java:67)
(etc)

--Rob

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