Hi, I had a few minutes to spare and took a quick look at the implementation. Philipp von Weitershausen wrote:
As for the implementation, I gave it my best shot in the philikon-aq-and-__parent__ branch. My experience with C is limited, especially when it comes to debugging. Help is therefore highly appreciated. There's a reward waiting for whoever fixes the problem and helps getting the branch merged to the trunk (see the proposal text).
I don't know any C (the only thing I ever did code in C was a simple wrapper script to actually call Solaris assembler ;) but nonetheless I thought I might be able to give some hints to the person that tries to fix this. Here's what I found regarding the segfault. All the segfaults come from tests in Products.Five. The first one that dumped core for me was the last test in Five/formlib/tests/formlib.txt in line 76. After a bit of debugging I found that it actually fails while trying to set a new object into a folder. As the folder where the object should be set into is derived from OFS.Folder it will call OFS.ObjectManager.checkValidId and fail on line 96 at: obj = getattr(self, id, None) My pdb session told me this: (Pdb) self <FiveTraversableFolder at /test_folder_1_/ftf> (Pdb) id 'test123' (Pdb) self.objectIds() ['content_1'] But more importantly: (Pdb) self.aq_chain [<FiveTraversableFolder at /test_folder_1_/ftf>, <Products.Five.metaclass.AddContentForm object at 0x30554d0>] (Pdb) self.__parent__ <Products.Five.metaclass.AddContentForm object at 0x30554d0> (Pdb) self.__parent__.__parent__ <FiveTraversableFolder at /test_folder_1_/ftf> (Pdb) self.__parent__.__parent__.__parent__ <Products.Five.metaclass.AddContentForm object at 0x30554d0> (Pdb) self.aq_parent <Products.Five.metaclass.AddContentForm object at 0x30554d0> (Pdb) self.aq_parent.aq_parent *** AttributeError: aq_parent So somehow the Acquisition chain got messed up and the getattr call gets down into an infinite loop, which will cause the segfault after some time. I hope this helps somebody to fix the actual problem, Hanno