i have a class derived from QPlainTextEdit, and it has a QCompleter.
when the completer's popup is visible and i press a key, the program crashes.

my KeyPressedEvent:
(it doesn't handle input yet, just shows or insert selection)
Qt Code: 
  1. void CodeEditor::keyPressEvent(QKeyEvent *e)
  2. {
  3.     if(mCompleter->popup()->isVisible())
  4.     {
  5.         switch(e->key())
  6.         {
  7.         case Qt::Key_Escape:
  8.             mCompleter->popup()->setVisible(false);
  9.             return;
  10.         case Qt::Key_Enter:
  11.         case Qt::Key_Return:
  12.         case Qt::Key_Tab:
  13.         case Qt::Key_Backtab:
  14.             e->ignore();
  15.             return;
  16.         default:
  17.             break;
  18.        }
  19.     }
  20.     else
  21.     {
  22.         switch(e->key())
  23.         {
  24.          .....
  25.         }
  26.     }
  27.     QPlainTextEdit::keyPressEvent(e);
  28. }
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the stack trace:
Qt Code: 
  1. 0	QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data	qscopedpointer.h	135	0x6a2a48be	
  2. 1	qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > >	qglobal.h	2314	0x6a10f2db	
  3. 2	QObject::d_func	qobject.h	125	0x6a28fd68	
  4. 3	QCoreApplication::notifyInternal	qcoreapplication.cpp	712	0x6a1fd43f	
  5. 4	QCoreApplication::sendEvent	qcoreapplication.h	215	0x00e7955a	
  6. 5	QCompleter::eventFilter	qcompleter.cpp	1313	0x00df9743	
  7. 6	QCoreApplicationPrivate::sendThroughObjectEventFilters	qcoreapplication.cpp	841	0x6a1fd711	
  8. 7	QApplicationPrivate::notify_helper	qapplication.cpp	4298	0x00822505	
  9. 8	QApplication::notify	qapplication.cpp	3765	0x00820187	
  10. 9	QCoreApplication::notifyInternal	qcoreapplication.cpp	726	0x6a1fd47a	
  11. 10	QCoreApplication::sendEvent	qcoreapplication.h	215	0x00e7955a	
  12. 11	QShortcutMap::tryShortcutEvent	qshortcutmap.cpp	340	0x0084f549	
  13. 12	QApplication::notify	qapplication.cpp	3748	0x00820072	
  14. 13	QCoreApplication::notifyInternal	qcoreapplication.cpp	726	0x6a1fd47a	
  15. 14	QCoreApplication::sendSpontaneousEvent	qcoreapplication.h	218	0x00e79506	
  16. 15	QETWidget::sendSpontaneousEvent	qkeymapper_win.cpp	571	0x00f54248	
  17. 16	QKeyMapper::sendKeyEvent	qkeymapper_win.cpp	1195	0x008a28ef	
  18. 17	QKeyMapperPrivate::translateKeyEvent	qkeymapper_win.cpp	1094	0x008a2406	
  19. 18	QtWndProc@16	qapplication_win.cpp	1739	0x00883a13	
  20. 19	USER32!IsWindowVisible	C:\Windows\system32\user32.dll	0	0x76e286ef	
  21. 20	??		0	0x000c054c	
  22. ...	<More>
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