[ubuntu-mono] [Bug 93753] Symbolic threaded stack trace

[Apport retracing service]

** Attachment added: "ThreadStacktrace.txt (retraced)"
   http://librarian.launchpad.net/6893492/%3Cfdopen%3E

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[apport] IndexHelper.exe crashed with SIGSEGV
https://launchpad.net/bugs/93753