[Phpwiki-talk] PCRE Crash in virgin setup (pgsrc files)

[Dan K. <do...@ax...>]

On Sun, 22 Aug 2004 14:24:43 +0200, Reini Urban wrote:
> Dan Kamins schrieb:
>
>> I'm kind of at a standstill now though, because 1.2 doesn't have
>> the features I need (as mentioned below) or work on my server
>> without modifications, and 1.3 crashes my server in a weird way (
>> http://sourceforge.net/tracker/?func=3Ddetail&aid=3D1013350&group_id=3D6121&
>> atid=3D106121 )... What to do... Anybody seen this PCRE crash
>> before?
>>
>>> From the bug report, this code crashes (which is a simpler
>>> version of what my ConvertOldMarkup() does to the file
>>> OldTextFormattingRules during virgin setup):
>> $pat =3D "/\A((?:.|\n)*?)(^(?:[ \t]+\S(?:.*\s*\n[ \t]+\S)*|".
>> "\|(?:.*\n\|)*|[#*;]*(?:[*#]|;.*?:)|\[\s*(\d+)\s*\]|".
>> "<\?plugin(?:-form)?\b.*\?>\s*$|!{1,3}[^!]).*$)\n?/m"; $subj =3D
>> str_repeat("123456789 ", 50); preg_match($pat, $subj);
>
> yes, this is a known issue.
> cause still unknown. happens only with huge anchored regex.
>
> please remove pgsrc/OldTextFormattingRules on virgin setup.
>

Well I removed that file and got the crash on another file instead.  I'm=
 sure if I remove THAT file, then it will crash on either another one of the=
 pgsrc files or one of my users' pages.  Basically it's not useable, and I=
 can't really grok that regexp enough to do anything about it (like=
 splitting it up into multiple passes with smaller expressions or=
 something...).

Guys, the app looks great, and I hope you keep up the good work.  If you=
 could post (reply to this) to this mailing list when you fix this=
 particular bug, I'm sure I (and whoever else finds this thread) will be=
 excited to get back on the bandwagon.  If there's anything I can do to help=
 for now, let me know.  Otherwise I'll be waiting on the sidelines and=
 watching this list.

For reference, the bug report for this item is:
http://sourceforge.net/tracker/?func=3Ddetail&aid=3D1013350&group_id=3D6121&atid=3D1=
06121

--
Dan Kamins