[Fontconfig-bugs] [Bug 97546] New: fc-cache failure with /System/Library/Fonts

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97546

            Bug ID: 97546
           Summary: fc-cache failure with /System/Library/Fonts
           Product: fontconfig
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Mac OS X (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: fc-cache
          Assignee: fontconfig-bugs at lists.freedesktop.org
          Reporter: ed at motologic.com
        QA Contact: freedesktop at behdad.org

Mac folks are seeing major performance issues with fontconfig 2.12.1 and this
post to the fontconfig list by Zhiming Wang has some details about the issue:

  https://lists.freedesktop.org/archives/fontconfig/2016-August/005811.html

In short, fc-cache fails to cache fonts in /System/Library/Fonts and, from then
on, every application that needs to read the cache triggers a cache build
(which fails again). 

I first reported this to the homebrew folks. You can see how this is impacting
performance from sample output here:

  https://github.com/Homebrew/homebrew-core/issues/4172

Other posts I've found:

  https://lists.freedesktop.org/archives/fontconfig/2016-August/005810.html
  https://trac.macports.org/ticket/52088

(FYI: "2.12" is not available in the Version field of this bug form).

Let me know if you need anything to help debug this.

Thank you.

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