[Fontconfig-bugs] [Bug 98422] New: fc-cache failed to generate correct cache for builtin font-set SFNS-series

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98422

            Bug ID: 98422
           Summary: fc-cache failed to generate correct cache for builtin
                    font-set SFNS-series
           Product: fontconfig
           Version: 2.12
          Hardware: x86-64 (AMD64)
                OS: Mac OS X (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: fc-cache
          Assignee: fontconfig-bugs at lists.freedesktop.org
          Reporter: qliu at semi.ac.cn
        QA Contact: freedesktop at behdad.org

This bug happens with new Xquartz 2.7.10, with fontconfig  lib 2.12.1
It seems have some problems when cache the system fonts SFNSDislay-* or
SFNSText-* in the directory /System/Library/Fonts/.

fc-cache will report an invalid cache file found and then delete it. Thus every
time the  fontconfig lib will recache it. This behavior results in a big
latency (15s~40s) when launching  program such as xterm and xfontsel. 

I am sure those SFNS-Series otf fonts have some problem with new version
fontconfig. 
but not sure it is due to the font file problem or errors from fontconfig.  

Temporary solution is to disable the font path /System/Library/Fonts in
/opt/X11/lib/X11/fontconfig/conf.d/05-OSX-fonts.conf

As it is terribly slowing down the launch of xterm and window manager, I mark
it as a critical problem, though the problem may be easy to solve.

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