QObject causes mem leak

Maybe Shiboken issue ( ? ).

Simple QObject creation and deletion causes mem leak.

9 line example code included.

I have tested it on Ubuntu14.04 LTS, Win7 32bit, Win7 64bit on PySide2 v5.11.2 and I believe it is general problem.

I believe this can relate with other mem leak issues:

https://bugreports.qt.io/browse/PYSIDE-763

https://bugreports.qt.io/browse/PYSIDE-140

https://bugreports.qt.io/browse/PYSIDE-154

https://bugreports.qt.io/browse/PYSIDE-488

https://bugreports.qt.io/browse/PYSIDE-618

https://bugreports.qt.io/browse/PYSIDE-832

Even this matplotlib interactive demo suffers from the leaks (tested on matplotlib 2.2.3).

Just add this 3 lines at the beginning of the example to ensure you use PySide2 for it:

import PySide2
import matplotlib
matplotlib.use("Qt5Agg")