When I try to deepcopy a QFont or QPen, I receive a segfault. This does not
happen with a QPolygon, which copies just fine. I have not done a thorough test
of QT classes to see which ones segfault and which ones don't; I'm presuming
this is either something that is broken in one place, or it is easy to
determine by grep'ing the source. I am running Arch Linux, kernel 3.0.3 with
PySide 1.0.5 and Python 2.7.2.

Some code to reproduce this:

>>> from PySide.QtGui import QPen
>>> import copy
>>> copy.deepcopy(QPen())
Segmentation fault

>>> from PySide.QtGui import QFont
>>> import copy
>>> copy.deepcopy(QFont())
Segmentation fault

>>> from PySide.QtGui import QPolygon
>>> import copy
>>> copy.deepcopy(QPolygon())
<PySide.QtGui.QPolygon()  at 0x1d759e0>

I think that these segfaults stem from a TypeError raised by __reduce__ with
QFont and QPen, but not QPolygon. Specifically,

>>> from PySide.QtGui import QFont
>>> f = QFont()
>>> f.__reduce__()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/copy_reg.py", line 70, in _reduce_ex
    raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle QFont objects

>>> from PySide.QtGui import QPen
>>> a = QPen()
>>> a.__reduce__()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.7/copy_reg.py", line 70, in _reduce_ex
    raise TypeError, "can't pickle %s objects" % base.__name__
TypeError: can't pickle QPen objects

>>> from PySide.QtGui import QPolygon
>>> a = QPolygon()
>>> a.__reduce__()
(<type 'PySide.QtGui.QPolygon'>, ([],))