[Bug 91168] Symbolic threaded stack trace

[Apport retracing service]

** Attachment added: "ThreadStacktrace.txt (retraced)"
   http://librarian.launchpad.net/6844283/%3Cfdopen%3E

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[apport] serpentine crashed with SIGSEGV in g_type_check_instance()
https://launchpad.net/bugs/91168