Added hint on where the segfault happens. My test output is irritating, it...

Added hint on where the segfault happens. My test output is irritating, it seems we end up with a cyclic aq_chain again :(

lib/python/Products/Five/browser/__init__.py

@@ -28,6 +28,9 @@ class BrowserView(zope.publisher.browser.BrowserView):
         # __of__ works.  With Acquisition, you get a wrapper around
         # the original object and only that wrapper's parent is the
         # new context.  Here we change the original object.
+        
+        # The first segfault happens in form.tests.forms.txt in the first line
+        # of the "Widget Overrides" chapter (line 154).
         #self.__parent__ = context  # ugh. segfault!
 
         return self