anchor.diff:   CharClasses:=nil;
    CountCharClasses:=0;
   
  + CharClassHashMap:=TFLRECharClassHashMap.Create;
  +
    LookAssertionStrings:=nil;
    CountLookAssertionStrings:=0;
   
  
positive.code: 
         CharClasses:TPFLRECharClasses;
         CountCharClasses:longint;
  
         LookAssertionStrings:TFLRELookAssertionStrings;
         CountLookAssertionStrings:longint;
  
negative.code:  SetLength(CharClasses,0);
   CountCharClasses:=0;
  
   CharClassHashMap.Free;
  
   SetLength(LookAssertionStrings,0);
  
   if assigned(OnePassNFANodes) then begin
  