On Wed, 03 Feb 2016 06:19:43 -0500, Nicolas Goaziou
<m...@nicolasgoaziou.fr> wrote:
"Loris Bennett" <loris.benn...@fu-berlin.de> writes:
re-search-forward("^[^%]*\\\\usepackage.*{biblatex}" nil t)
This is a pathological regexp. [^%] is anything but a percent sign, so
it can contain newline characters. Basically [^%]* can match an entire
buffer if it doesn't contain any %.
I think the regexp used in `reftex-using-biblatex-p' should be
"^[^%\n]*\\\\usepackage.*{biblatex}"
Here's a link about the extreme difficulty of detecting pathological
regular expressions:
https://mail.python.org/pipermail/python-dev/2003-May/035916.html
The author analyses the exponential not-found situation for (x+x+)+y and
then suggests that for larger expressions, "... no more than 1 programmer
in 1000 has even a vague idea how to start looking for such problems."
