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IDProjectCategoryView StatusDate SubmittedLast Update
0009895VTK(No Category)public2009-11-13 18:452016-08-12 09:55
ReporterJerome Velut 
Assigned ToKitware Robot 
PrioritynormalSeveritycrashReproducibilityalways
StatusclosedResolutionmoved 
PlatformPCOSLinuxOS VersionFedora 9/11
Product Version 
Target VersionFixed in Version 
Project
Type
Summary0009895: vtkEventQtSlotConnect::Connect crashes a simple Qt application when VTK is compiled in release mode only
DescriptionI wanted to catch VTK event from a Qt application (ParaView, in fact). I used vtkEventQtSlotConnect to connect the renwin interactor events to a Qt widget. If I link the project to a Debug-compiled VTK, this works well. But a Release-mode VTK yields a seg fault.

Here is the GDB backtrace for the modified SimpleView detailed thereafter:

#################################################"
Program received signal SIGSEGV, Segmentation fault.
0x01ad5ee4 in vtkSubjectHelper::AddObserver () from /home/dje/Softwares/Paraview-3.7-Release/bin/libvtkCommon.so.pv3.7
(gdb) backtrace
#0 0x01ad5ee4 in vtkSubjectHelper::AddObserver () from /home/dje/Softwares/Paraview-3.7-Release/bin/libvtkCommon.so.pv3.7
#1 0x01ad5f9e in vtkObject::AddObserver () from /home/dje/Softwares/Paraview-3.7-Release/bin/libvtkCommon.so.pv3.7
#2 0x0047b063 in vtkQtConnection::SetConnection () from /home/dje/Softwares/Paraview-3.7-Release/bin/libQVTK.so.pv3.7
#3 0x0047a826 in vtkEventQtSlotConnect::Connect () from /home/dje/Softwares/Paraview-3.7-Release/bin/libQVTK.so.pv3.7
#4 0x0804c299 in SimpleView::SimpleView ()
#5 0x0804bd28 in main ()
Steps To ReproduceAttached is a modified version of the SimpleView that you can find in VTK/Examples/GUI/Qt. The not-so-many modifications are enclosed between comments that contain "JEROME: "

Basically, the following lines make an application crashes:
  vtkEventQtSlotConnect* VTKConnect = vtkEventQtSlotConnect::New( );
  vtkRenderWindowInteractor* iren = this->ui->qvtkWidget
                                            ->GetRenderWindow( )
                                            ->GetInteractor( );
  VTKConnect->Connect( iren,
                       vtkCommand::MouseWheelBackwardEvent,
                       this,
                       SLOT( catchVTKEvent()),
                       0,
                       1.0);

Additional InformationI investigated on the RenderWindowInteractor validity: Surprisingly,
   this->ui->qvtkWidget
            ->GetRenderWindow( )
            ->PrintSelf( cout, vtkIndent());
shows a different "Interactor: " value that the simple test
   cout << iren;

My opinion is twofolds:
(1) I misused the QVTKWidget, that's why the interactor is not valid
(2) The QVTKWidget has a 'release-exclusive' bug.
TagsNo tags attached.
Relationships
Attached Filesbz2 SimpleViewConnectionBug.tar.bz2 (9,220) 2009-11-13 18:45
https://www.vtk.org/Bug/file/7656/SimpleViewConnectionBug.tar.bz2
Issue History
Date ModifiedUsernameFieldChange
2009-11-13 18:45Jerome VelutNew Issue
2009-11-13 18:45Jerome VelutFile Added: SimpleViewConnectionBug.tar.bz2
2009-11-20 04:35Jerome VelutNote Added: 0018491
2011-06-16 13:11Zack GalbreathCategory => (No Category)
2016-08-12 09:55Kitware RobotNote Added: 0037120
2016-08-12 09:55Kitware RobotStatusexpired => closed
2016-08-12 09:55Kitware RobotResolutionopen => moved
2016-08-12 09:55Kitware RobotAssigned To => Kitware Robot

Notes
(0018491)
Jerome Velut   
2009-11-20 04:35   
I cannot reproduce this bug anymore. That's fine for me, but I really wonder what's happened...
(0037120)
Kitware Robot   
2016-08-12 09:55   
Resolving issue as `moved`.

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