Hello, when I try to run the BalloonWidget example I’ve got a SIGSEV error (it disappears if I comment the EnabledOn() line… but then it is not a very useful example !)
Other examples work well and I have installed vtk 9.2.2 via pip with python 3.10 in a virtual environment.
Do you know what could be the problem ?
EDIT : moving to development as it is more a bug I guess
I can confirm this is a crash in Linux. It works Ok in Windows.
In looking at the debugger it seems to be crashing at line 112 in the function void FireTimers(vtkXRenderWindowInteractor* rwi) in vtkXRenderWindowInteractor.cxx after the first iteration, so it is probably accessing a nonexistent timer (my guess). On line 120: rwi->IsOneShotTimer(timerId) is false which may also be a clue.
I have no idea what is going on. @ben.boeckel any ideas?
The vtkHoverWidget (parent of vtkBalloonWidget) destroys the timer in its callback, and this results in an invalid iterator during the for loop in vtkXRenderWindowInteractor::FireTimers().
The loop in FireTimers() will have to be rewritten so that it doesn’t iterate over a container whose elements might be deleted during the loop. Should be an easy thing to fix.
The CI missed this one because it happens only in interactive mode. It is reproducible by running ./bin/vtkInteractionWidgetsCxxTests TestBalloonWidget -I.
@dgobbi’s change fixes the bug.
Thank you for your work ! Do you have an idea of when the fix will be available in python wheels ?
There’s no plan for another 9.2 release at the moment.