Failed to disconnect signal when closing main window with PySide2

[titusjan]

When using the PySide2 binding the following errror occurs when you close a/the main window.

Traceback (most recent call last):
  File "/Users/kenter/prog/py/argos/argos/widgets/mainwindow.py", line 826, in closeEvent
    self.finalize()
  File "/Users/kenter/prog/py/argos/argos/widgets/mainwindow.py", line 127, in finalize
    self.collector.sigContentsChanged.disconnect(self.collectorContentsChanged)
RuntimeError: Failed to disconnect signal sigContentsChanged(QString).

My suspicion is that it occurs because the disconnect is called in the closeEvent. More investigation is needed.

[titusjan]

By the way this is on OS-X 10.14.6

Python         : 3.6.7 |Anaconda, Inc.| (default, Oct 23 2018, 14:01:38) [GCC 4.2.1 Compatible Clang 4.0.1 (tags/RELEASE_401/final)]
pyside2        : 5.12.4 (Qt: 5.12.1)
numpy          : 1.17.0
scipy          : 1.3.1
pandas         : 0.25.0
pyqtgraph      : 0.11.0.dev0
exdir          : 
pgcolorbar     : 1.0.0
cmlib          : 1.0.1
h5py           : 2.9.0 (libhdf5: 1.10.5)
netCDF4        : 1.5.1.2 (libncdf4: 4.6.2, libhdf5: 1.10.5)
pillow (PIL)   : 6.1.0
argos          : 0.3.0.rc2 (debugging-mode)