[antlr-interest] Out of Memory in antlr.CharScanner.match

[Yury Serdyuk]

Hi !

I have a (C#) grammar with the rule

COMMENT1
  : "//"  ( ~ ( '\n' | '\r' ) )* {$setType ( Token.SKIP ); }
  ;

If "//" are two last symbols in the input text, lexer failed with

> Unhandled Exception: System.OutOfMemoryException: Out of memory
>   at <0x00000> <unknown method>
>   at (wrapper managed-to-native) System.String:InternalAllocateStr (int)
>   at System.Text.StringBuilder.InternalEnsureCapacity (Int32 size) 
> [0x00000]
>   at System.Text.StringBuilder.Append (Char value) [0x00000]
>   at antlr.CharScanner.append (Char c) [0x00000]
>   at antlr.CharScanner.consume () [0x00000]
>   at antlr.CharScanner.match (antlr.collections.impl.BitSet b) [0x00000]
>   at MCSlexer.mCOMMENT1 (Boolean _createToken) [0x00000]

for C#-runtime.
For Java-runtime, the log is

> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
>         at antlr.ANTLRStringBuffer.append(ANTLRStringBuffer.java:36)
>         at antlr.CharScanner.append(CharScanner.java:66)
>         at antlr.CharScanner.consume(CharScanner.java:84)
>         at antlr.CharScanner.match(CharScanner.java:207)
>         at MCSlexer.mCOMMENT1(MCSlexer.java:432)

But if I form a grammar from the one simple rule in the parser and from
the same lexer the error is disappeared.
Any help ?

With best wishes,
                                 Yury Serdyuk.