[Bug 4634] [FO] poorly formed back-references

http://www.w3.org/Bugs/Public/show_bug.cgi?id=4634





------- Comment #1 from mike@saxonica.com  2007-06-12 20:38 -------
For consistency this also means that it should be an error to use \3 if no
third subexpression exists. So I would suggest changing

The closing right parenthesis of this subexpression must occur before the
back-reference. 

to

"The regular expression is invalid if this subexpression does not exist or if
its closing right parenthesis occurs after the back-reference."

Received on Tuesday, 12 June 2007 20:38:06 UTC