[antlr-interest] Use of $text within parser rule changes return type of the rule?

[Chuck]

The following parser rule 

  rule1 returns [String rStr] : ID ;

generates a rule with the following return type:

 public final String rule1() throws
RecognitionException {

But if I add an action that uses the predefined rule
attribute "$text" such as the following line:

  rule1 returns [String rStr] : ID
{System.out.println($text);} ;

it changes the return type of the rule to the
following:

 public final TgramParser.rule1_return rule1() throws
RecognitionException {
 
Is this behavior a bug or are there some restrictions
on using using prefined rule attributes 
in conjunction with return types?

thanks

Chuck



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