[Zope] [BUG] calling a constructor crashes Zope

While developing a product I encountered the following fatal problem. I added a stupid class declaration to my product: class AJFile: def __init__(self): self.d = {} Inside a function of the product I call "AJF = AJFile()". Zope/Python call __init__() but crashes before the initialisation of self.d (a debugging message before self.d={} is always the last life sign). Zope completely crashes in this situation. However I have no idea how get solve this problem. I do not see a core dump nor any debugging or error messages on stdout/stderr. The problem occurs with Zope 2.2.4 and 2.3alpha1 (Linux i386). Any ideas for further debugging ? Andreas