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Postings from April 2015
On Mon, 27 Apr 2015, James E Keenan via RT wrote:
> > I think this is a similar bug to the one I have just
> > fixed in PCRE.
> >
>
> Can you provide a link to that fix?
>
> Thank you very much.
Not very easily (I'd have to check the SVN manual to figure out how to
search for stuff - I'm a very simple user) and in any case the fix was
different for PCRE1 and PCRE2. The bug was in the test programs pcretest
and pcre2test rather than in the library itself (which only does single
matches). Here is a comment from pcre2test.c:
However, even after matching a non-empty string, there is still one
tricky case. If a pattern contains \K within a lookbehind assertion at the
start, the end of the matched string can be at the offset where the match
started. In the case of a normal /g iteration without special action, this
leads to a loop that keeps on returning the same substring.
The code now checks for this case and advances the /g loop by one
character, just as it does for matching an empty string.
Regards,
Philip
--
Philip Hazel
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