I have an occasional problem creating deepcopy's of some QColor objects. If I
create a blank (invalid) QColor() and then try to deepcopy it, I get a
"SystemError: NULL result without error in PyObject_Call". If the QColor has a
valid RGB value, though, it copies just fine. deepcopy'ing blank QColor objects
works fine with PyQT4 (which I am porting an application from). Commands to
reproduce this are:

>>> from PySide.QtGui import QColor
>>> import copy
>>> copy.deepcopy(QColor())
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/copy.py", line 182, in deepcopy
    rv = reductor(2)
SystemError: NULL result without error in PyObject_Call
>>> copy.deepcopy(QColor(1,2,3))
<PySide.QtGui.QColor(ARGB 1, 0.00392157, 0.00784314, 0.0117647)  at 0x2591b90>

I would expect copy.deepcopy(QColor()) to return another invalid QColor(). I
think SystemError this has to do with __reduce__ not working with an invalid
QColor. i.e.

>>> QColor().__reduce__()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
SystemError: error return without exception set
>>> QColor(1,2,3).__reduce__()
(<built-in function fromRgbF>, (0.00392156862745098, 0.00784313725490196,
0.011764705882352941, 1.0))

I'm running Arch Linux, kernel 3.0.3 with PySide 1.0.5. Is this considered a
bug, or is this not supposed to be supported?