[pcre-dev] [Bug 1803] segfault in pcre jit when running twig…

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Auteur: admin
Date:  
À: pcre-dev
Sujet: [pcre-dev] [Bug 1803] segfault in pcre jit when running twig test suite (PHP7)
https://bugs.exim.org/show_bug.cgi?id=1803

--- Comment #43 from Nish Aravamudan <nish.aravamudan@???> ---
(In reply to Zoltan Herczeg from comment #39)
> (In reply to Zoltan Herczeg from comment #38)
> > I mean just print *extra_bump here:
> >
> > count = pcre_exec(re_bump, extra_bump, subject,
> >
> > so we can see all of its fields.
>
> I have to go now. Anyway, if the 0x20 flag is set in extra_bump->flags and
> extra_data->mark points to the address of size_offsets then we nailed the
> problem. I suspect extra_data->mark is not initialized, or setting the flag
> is not intentional. Btw do you know the meaning of 's' in /./us ? I suspect
> 'u' is UTF8.


I *think* you have hit it on the head, and I'm hoping it's just a PHP bug when
the moved to the JIT implementation for split().

From: http://perldoc.perl.org/perlre.html
s

Treat string as single line. That is, change "." to match any character
whatsoever, even a newline, which normally it would not match.

Used together, as /ms, they let the "." match any character whatsoever, while
still allowing "^" and "$" to match, respectively, just after and just before
newlines within the string.

And you're right, /u is for unicode.

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