[Bug 96913] Symbolic threaded stack trace

[Apport retracing service]

** Attachment added: "ThreadStacktrace.txt (retraced)"
   http://librarian.launchpad.net/6994921/%3Cfdopen%3E

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[apport] hald-addon-macbookpro-backlight crashed with SIGSEGV in _dbus_message_has_type_interface_member()
https://launchpad.net/bugs/96913