QCompleter related crash

[jajdoo]

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)

void CodeEditor::keyPressEvent(QKeyEvent *e)
{
    if(mCompleter->popup()->isVisible())
    {
        switch(e->key())
        {
        case Qt::Key_Escape:
            mCompleter->popup()->setVisible(false);
            return;
        case Qt::Key_Enter:
        case Qt::Key_Return:
        case Qt::Key_Tab:
        case Qt::Key_Backtab:
            e->ignore();
            return;
        default:
            break;
       }
    }
    else
    {
        switch(e->key())
        {
         .....
        }
    }
    QPlainTextEdit::keyPressEvent(e);
}

void CodeEditor::keyPressEvent(QKeyEvent *e)
{
    if(mCompleter->popup()->isVisible())
    {
        switch(e->key())
        {
        case Qt::Key_Escape:
            mCompleter->popup()->setVisible(false);
            return;
        case Qt::Key_Enter:
        case Qt::Key_Return:
        case Qt::Key_Tab:
        case Qt::Key_Backtab:
            e->ignore();
            return;
        default:
            break;
       }
    }
    else
    {
        switch(e->key())
        {
         .....
        }
    }
    QPlainTextEdit::keyPressEvent(e);
}

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the stack trace:

0	QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data	qscopedpointer.h	135	0x6a2a48be	
1	qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > >	qglobal.h	2314	0x6a10f2db	
2	QObject::d_func	qobject.h	125	0x6a28fd68	
3	QCoreApplication::notifyInternal	qcoreapplication.cpp	712	0x6a1fd43f	
4	QCoreApplication::sendEvent	qcoreapplication.h	215	0x00e7955a	
5	QCompleter::eventFilter	qcompleter.cpp	1313	0x00df9743	
6	QCoreApplicationPrivate::sendThroughObjectEventFilters	qcoreapplication.cpp	841	0x6a1fd711	
7	QApplicationPrivate::notify_helper	qapplication.cpp	4298	0x00822505	
8	QApplication::notify	qapplication.cpp	3765	0x00820187	
9	QCoreApplication::notifyInternal	qcoreapplication.cpp	726	0x6a1fd47a	
10	QCoreApplication::sendEvent	qcoreapplication.h	215	0x00e7955a	
11	QShortcutMap::tryShortcutEvent	qshortcutmap.cpp	340	0x0084f549	
12	QApplication::notify	qapplication.cpp	3748	0x00820072	
13	QCoreApplication::notifyInternal	qcoreapplication.cpp	726	0x6a1fd47a	
14	QCoreApplication::sendSpontaneousEvent	qcoreapplication.h	218	0x00e79506	
15	QETWidget::sendSpontaneousEvent	qkeymapper_win.cpp	571	0x00f54248	
16	QKeyMapper::sendKeyEvent	qkeymapper_win.cpp	1195	0x008a28ef	
17	QKeyMapperPrivate::translateKeyEvent	qkeymapper_win.cpp	1094	0x008a2406	
18	QtWndProc@16	qapplication_win.cpp	1739	0x00883a13	
19	USER32!IsWindowVisible	C:\Windows\system32\user32.dll	0	0x76e286ef	
20	??		0	0x000c054c	
...	<More>

0	QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> >::data	qscopedpointer.h	135	0x6a2a48be	
1	qGetPtrHelper<QScopedPointer<QObjectData, QScopedPointerDeleter<QObjectData> > >	qglobal.h	2314	0x6a10f2db	
2	QObject::d_func	qobject.h	125	0x6a28fd68	
3	QCoreApplication::notifyInternal	qcoreapplication.cpp	712	0x6a1fd43f	
4	QCoreApplication::sendEvent	qcoreapplication.h	215	0x00e7955a	
5	QCompleter::eventFilter	qcompleter.cpp	1313	0x00df9743	
6	QCoreApplicationPrivate::sendThroughObjectEventFilters	qcoreapplication.cpp	841	0x6a1fd711	
7	QApplicationPrivate::notify_helper	qapplication.cpp	4298	0x00822505	
8	QApplication::notify	qapplication.cpp	3765	0x00820187	
9	QCoreApplication::notifyInternal	qcoreapplication.cpp	726	0x6a1fd47a	
10	QCoreApplication::sendEvent	qcoreapplication.h	215	0x00e7955a	
11	QShortcutMap::tryShortcutEvent	qshortcutmap.cpp	340	0x0084f549	
12	QApplication::notify	qapplication.cpp	3748	0x00820072	
13	QCoreApplication::notifyInternal	qcoreapplication.cpp	726	0x6a1fd47a	
14	QCoreApplication::sendSpontaneousEvent	qcoreapplication.h	218	0x00e79506	
15	QETWidget::sendSpontaneousEvent	qkeymapper_win.cpp	571	0x00f54248	
16	QKeyMapper::sendKeyEvent	qkeymapper_win.cpp	1195	0x008a28ef	
17	QKeyMapperPrivate::translateKeyEvent	qkeymapper_win.cpp	1094	0x008a2406	
18	QtWndProc@16	qapplication_win.cpp	1739	0x00883a13	
19	USER32!IsWindowVisible	C:\Windows\system32\user32.dll	0	0x76e286ef	
20	??		0	0x000c054c	
...	<More>

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[jajdoo]

im really lost here.. anyone has at least a hunch about what could be wrong?
i tried using the ->complete method, and that causes a crash without any debug information at all.
one thing i've noticed is that the popup doesn't show at the bottom of the document when i show it (like it would if no QRect was declared when calling ->complete)

[jajdoo]

ok..........
that's embracing.

forgot to ->setWidget....