Applies to both of the 2 recent versions I tested: 6.1.0.1 SVN 12353 & 6.1.0.2 SVN 12426.
Reproduction:
- Create a parent rule to find "find & replace dummy text", and replace with nothing, designed not to execute.
- Create a child subrule to regex find ".+", and replace with nothing, which should not execute.
- Run. The page is blanked when it should not have been.
This happens regardless of the parent rule's regex & case sensitivity.