Antoine Pitrou added the comment: The exact same issue happens when concatenating a list subclass to a tuple:
>>> () + L([1,2]) [1, 2] >>> (3,) + L([1,2]) # crash Also, note that in this case a list is returned, not a tuple despite the first operand being a tuple. Conversely: >>> [] + T((1,2)) (1, 2) A tuple is returned, not a list. Which is exactly what happens when calling T.__add__: >>> T.__add__((), T((1,2))) (1, 2) My intuition is that the issue is somewhere in binary_op1() (called by PyNumber_Add) in abstract.c. I can't go much further since my own builds don't exhibit the issue. (in the end, chances are it's a MSVC compiler bug) ---------- nosy: +amaury.forgeotdarc _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue8847> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
