On Sat, 21 Sep 2013 17:16:41 -0400, Terry Reedy
When an AttributeError is raised in a __del__ method, it is caught and ignored, except that it is not completely ignored but is replaced by a warning message sent to stderr. Example:
class C(): def __del__(self): raise AttributeError
c=C() del c Exception AttributeError: AttributeError() in
> ignored
From the issue, it sounds like it could be considered either (or most
This is a replacement for a traceback. In later Python versions, the full traceback is printed. In the general case it represents a bug in the code that should be fixed. Most such errors arise from the vagaries of module finalization (such as your issue 19021), but not all of them do: the rest represent real bugs in __del__ methods (which are executed asynchronously in the general case). So the question is, is the bug in the user code, or the stdlib code? likely, both). --David