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  1. Qt
  2. QTBUG-80859

SIGSEGV during QWidgetBackingStore::qt_flush() via xcbSourceDispatch()

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P1: Critical
    • Resolution: Done
    • Affects Version/s: 5.12.2, 5.12.6
    • Fix Version/s: 5.12.7
    • Labels:
      None

      Description

      Apologies that I do not have minimal repro program or other details. This crash has been plaguing us every since we upgraded to 5.12.2 (from 5.4.1), and I haven't been able to figure out a repro for it yet.

      I wanted to share the stack trace just in case anyone had seen anything similar or may have any pointers on possible culprits

      
      {\{QWidgetBackingStore::qt_flush() }}
       \{{QWidgetBackingStore::flush() }}
       \{{QWidgetBackingStore::doSync() }}
       \{{QWidget::event() }}
       \{{QApplicationPrivate::notify_helper() }}
       \{{QApplication::notify() }}
       \{{QCoreApplication::sendEvent() }}
       \{{QWidgetBackingStore::sendUpdateRequest() }}
       \{{QWidgetBackingStore::markDirty() }}
       \{{QWidgetWindow::repaintWindow() }}
       \{{QMetaObject::activate() }}
       \{{QWindowPrivate::emitScreenChangedRecursion() }}
       \{{QWindowPrivate::setTopLevelScreen() }}
       \{{QGuiApplicationPrivate::processWindowSystemEvent() }}
       \{{QWindowSystemInterface::sendWindowSystemEvents() }}
       \{{xcbSourceDispatch() }}
       \{{g_main_context_iterate.llvm.1369312655442132882 }}
       \{{QEventDispatcherGlib::processEvents() }}
       \{{QEventLoop::exec() }}
       \{{QCoreApplication::exec() }}
       \{{main }}
       \{{__libc_start_main }}
      
       
      
      

      It's a linux desktop application. Sometimes the crashes seem correlated when the application opens up multiple windows / dialogs, though it doesn't seem to be 100% and definitely doesn't reproduce consistently.

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              Assignee:
              liaqi Liang Qi
              Reporter:
              mbjorge Michael Bjorge
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                Resolved:

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