[Qt-interest] QStackedWidget crash, but only when running in debugger

[Andre Somers]

Hi,

I am running into an annoying problem using the debugger from Qt Creator 
(from 2009.3 SDK for Windows XP). I am trying to debug a crash in my 
application. The problem is, the application crashes at startup in the 
debugger, while in the normal situation it runs perfectly fine using 
exactly the same build (debug). The crash occurs at a moment a widget is 
added to a QStackedWidget using addWidget(configuration).

QWidget* configuration = ext->configurationWidget(0);

if (configuration) {

ui.propertyStack->addWidget(configuration);

connect(ext, SIGNAL(closeConfiguration()), this, 
SLOT(closePropertyConfiguration()));

}


The call is made at the third line of the code above. At the moment of 
calling, both the QStackedWidget ui.propertyStack and the configuration 
widget I am trying to add are perfectly valid pointers.

This is the stacktrace I get. The call is made from the function at 
level 6.

0    QObject::parent    qobject.h    243   
1    QWidget::parentWidget    qwidget.h    988   
2    QLayout::addChildWidget    qlayout.cpp    948   
3    QStackedLayout::insertWidget    qstackedlayout.cpp    213   
4    QStackedLayout::addWidget    qstackedlayout.cpp    193   
5    QStackedWidget::addWidget    qstackedwidget.cpp    166   
6    MatrixSetup::addPropertyExtension    matrixsetup.cpp    651   
7    MatrixSetup::initializePropertyExtensionTree    matrixsetup.cpp    
637   
8    MatrixSetup::MatrixSetup    matrixsetup.cpp    105   
9    Ui_MainUi::setupUi    ui_main.h    140   
10    MainUiMatrixCompiler::MainUiMatrixCompiler    mainui.cpp    15   
11    qMain    main.cpp    16   
12    WinMain    qtmain_win.cpp    136   
13    main        0   

Can anyone please point me to an explanation on what's going on here, 
and to get around it? It is very annoying that the debugger seems to 
trigger bugs all by itself... That makes debugging *actual* problems 
quite a bit harder and more time consuming than nessecairy.

Thanks,

André