vtkDebugLeaks detects leaks without pattern

[Keyn]

Hello everyone, I have a rather generic question about vtkDebugLeaks. I build vtk 8.2 successfully with it on and was using it for quite some time now. The only report i ever got form vtkDebugLeaks is the following on exiting Qt programs where vtk is used:

vtkDebugLeaks has detected LEAKS!
Class "vtkObjectFactoryCollection" has 1 instance still around.

But this only happens sometimes, and not in a pattern which I could notice at all. Often I only get the message that no leaks were detected. Can somebody give me a hint where to look for a potential leak or does it sometimes happen, due to using the New() function for Objects?

Thanks in advance!

[mwestphal (Mathieu Westphal (Kitware))]

Try this:

New feature: getting a stack trace on leaked objects with VTK_DEBUG_LEAKS

I just merged a new feature to VTK that augments vtkDebugLeaks. This feature lets you record a stack trace where leaked VTK objects were allocated. This can be a very useful when debugging VTK object leaks. Previously, if you configured VTK with VTK_DEBUG_LEAKS set to ON, VTK would report the types of VTK objects that were never deleted and how many there were when the application exited. This was a useful feature to let you know there was a leak, but it didn’t provide much insight into where t…

[Keyn]

Thank you!
I already tried this, but nothing else gets reported except the part i posted above. I set the environmental variable as mentioned in the post. I am working on Windows 10.
For example, today, only one time a leak appeared, again form vtkObjectFactoryCollection.

Maybe any other suggestions?
Thanks again!