[drkonqi] [Bug 409471] New: [DrKonqi] crash on exit: message handler race condition

[RJVB]

https://bugs.kde.org/show_bug.cgi?id=409471

            Bug ID: 409471
           Summary: [DrKonqi] crash on exit: message handler race
                    condition
           Product: drkonqi
           Version: 5.16.2
          Platform: Compiled Sources
                OS: All
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: rjvbertin at gmail.com
  Target Milestone: ---

Created attachment 121310
  --> https://bugs.kde.org/attachment.cgi?id=121310&action=edit
backtrace

SUMMARY
After a recent commit, DrKonqi installs a message handler of its own using
qInstallMessageHandler(). It does not uninstall that handler when it is being
deleted. As a result any debug/warning/logging messages generated later on
during the global destruction phase can cause the crash shown in the attached
backtrace.


STEPS TO REPRODUCE
1. install (say) a development Qt version that prints very late debug output
during application exit
2. trigger DrKonqi
3. quit DrKonqi

OBSERVED RESULT
A crash; DrKonqi probably triggers on itself

EXPECTED RESULT
No crash.


ADDITIONAL INFORMATION

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