But the second one (which seems a reasonable fix) makes Emacs unable to display any non-western characters.

-    if ([fkeys count] > 0)
-      matchingDescs = [fdesc matchingFontDescriptorsWithMandatoryKeys: fkeys];
-    else
-      matchingDescs = [NSMutableArray array];
+    matchingDescs = [fdesc matchingFontDescriptorsWithMandatoryKeys: fkeys];


--  
Best regards,
Chris


On Saturday, January 12, 2013 at 6:09 PM, Jan Djärv wrote:

> Hello.
>  
> 12 jan 2013 kl. 04:49 skrev Chris Zheng <chrisdcheng@gmail.com (mailto:chrisdcheng@gmail.com)>:
>  
> > I suffered this problem too, and it's because of two bug fixes after I dig it awhile.
> >  
> > bug#11484: 23.4; Scrolling leaves traces of old text behind
> >  
> > http://lists.gnu.org/archive/html/bug-gnu-emacs/2012-05/msg00383.html
> >  
> > LCD-smoothing was turned off to fix this bug,
> >  
> > and  
> >  
> > bug#11541: - Another reproduction - Emacs 24.2; Null pointer on OSX with
> >  
> > http://lists.gnu.org/archive/html/bug-gnu-emacs/2012-09/msg01293.html
> >  
> > I simply revert these two fixes, and problem you mentioned is gone.  
> >  
> > So, maybe there are more deeper things around of these two bugs.
>  
> Yes there are. The first one is due to the fact that the font code miscalculates the font metrics when lcd-smoothing is on. It may be related to some premature optimizations such as caching of font metrics in the font code.
>  
> The second one is because the memory handling in the font code is incorrect and leads to crashes for some people (may depend on font and/or OS version and/or compiler version/settings). The second one does not happen when run in gdb. But when it does happen, as it does for me right now, Emacs crashes.
>  
> Jan D.