Problem with antlr grammar (lexical)

I get a mismatched set exception when I try to parse "abc" (the quote marks are part of the input)

Here is the (simplified) grammar - pretty much verbatim from the Java.g example and basically the same from other example grammars. Is there some bug in the latest version? Using 3.2 in the context of eclipse.

Thanks in advance.

grammar String;

options { language = C; }

rule: literal EOF;

literal : CHARLITERAL | STRINGLITERAL ;

CHARLITERAL : '\'' ( EscapeSequence | ~( '\'' | '\\' | '\r' | '\n' ) ) '\'' ;

STRINGLITERAL开发者_运维知识库 : '"' ( EscapeSequence | ~( '\\' | '"' | '\r' | '\n' )

)* '"' ;

fragment EscapeSequence : '\\' ( 'b' | 't' | 'n' | 'f' | 'r' | '\"' | '\'' | '\\' |

('0'..'3') ('0'..'7') ('0'..'7') |

('0'..'7') ('0'..'7') |

('0'..'7') )

;

I'm confused by these last edits, but the problem is with the interpreter and is a known problem. Reported in 09.

If the code is generated for the grammar, it works like a charm.

It seems hard to believe that this bug has gone unanswered so long given it's frequency of occurrence.