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0009895

VTK

(No Category)

public

2009-11-13 18:45

2016-08-12 09:55

Reporter

Jerome Velut

Assigned To

Kitware Robot

Priority

normal

Severity

crash

Reproducibility

always

Status

closed

Resolution

moved

Platform

Linux

OS Version

Fedora 9/11

Product Version

Target Version

Fixed in Version

Summary

0009895: vtkEventQtSlotConnect::Connect crashes a simple Qt application when VTK is compiled in release mode only

Description

I 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 Reproduce

Attached 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 Information

I 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.

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Attached Files

SimpleViewConnectionBug.tar.bz2 [^] (9,220 bytes) 2009-11-13 18:45

Relationships

Notes
(0018491) Jerome Velut (reporter) 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 (administrator) 2016-08-12 09:55	Resolving issue as `moved`. This issue tracker is no longer used. Further discussion of this issue may take place in the current VTK Issues page linked in the banner at the top of this page.

Issue History
Date Modified	Username	Field	Change
2009-11-13 18:45	Jerome Velut	New Issue
2009-11-13 18:45	Jerome Velut	File Added: SimpleViewConnectionBug.tar.bz2
2009-11-20 04:35	Jerome Velut	Note Added: 0018491
2011-06-16 13:11	Zack Galbreath	Category	=> (No Category)
2016-08-12 09:55	Kitware Robot	Note Added: 0037120
2016-08-12 09:55	Kitware Robot	Status	expired => closed
2016-08-12 09:55	Kitware Robot	Resolution	open => moved
2016-08-12 09:55	Kitware Robot	Assigned To	=> Kitware Robot