[Qt-interest] scalar deleting destructor() ???

[Eirik Ulvik]

Den 24.03.2010 12:43, skrev Santhosh Y:
> Hi,
> 
> Following is the call stack trace for the application which is crashing, 
> subsequently.
> 
>  >    my.exe!mod2::le::~le()  Line 101    C++
>      my.exe!mod2::le::`scalar deleting destructor'()  + 0xf bytes    C++
>      my.exe!mod2::CentralWindow::~CentralWindow()  Line 28 + 0x3c 
> bytes    C++
>      my.exe!mod2::CentralWindow::`scalar deleting destructor'()  + 0xf 
> bytes    C++
>      my.exe!mod2::WorkspaceView::cleanup()  Line 143 + 0x24 bytes    C++
>      my.exe!mod2::WorkspaceView::~WorkspaceView()  Line 133    C++
>      my.exe!mod2::WorkspaceView::`scalar deleting destructor'()  + 0xf 
> bytes    C++
>      
> my.exe!module1::WorkspaceTabBar::detachWorkspaceView(mod2::WorkspaceView 
> * ws=0x0e4fa2b0)  Line 238 + 0x33 bytes    C++
>      my.exe!module1::WorkspaceTabBar::tabTobeClosed()  Line 517 + 0x26 
> bytes    C++
>      my.exe!module1::WorkspaceTabBar::qt_metacall(QMetaObject::Call 
> _c=InvokeMetaMethod, int _id=1, void * * _a=0x0012afd0)  Line 74    C++
> 
> 
> I suspect, some thing is wrong when this message  "scalar deleting 
> destructor'()" is coming on the trace.
> I think almost all the time, when this message comes it is leading to a 
> crash!!!
> 
> 
> Anybody know, why this message is coming ??  What is the issue here. I 
> tried googling this issue...but not much help there!
> 
> Thanks in advance.
> 
> Regards,
> Santhosh
> 
It is quite difficult to know what your problem is. What seems to be the
case is that you are deleting an object that has already been deleted.
If this is a QWidget based class there are a couple of options:

- First and most probably what is happening is that you are 	  deleting
a QWidget that Qt itself already has deleted.

- Second, if you are sure that you have to delete the object use the
deleteLater function (if it is a QObject). This should let all events be
processed before deleting the object itself.

Regards,
Eirik

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