[Bug 1872891] StacktraceSource.txt

[Apport retracing service]

** Attachment added: "StacktraceSource.txt"
   https://bugs.launchpad.net/bugs/1872891/+attachment/5354329/+files/StacktraceSource.txt

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https://bugs.launchpad.net/bugs/1872891

Title:
  ksmserver-logout-greeter crashed with SIGABRT in __GI_raise()

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