Antoine Pitrou added the comment: For some reasons I was able to reproduce under 64-bit Windows with the 3.3b1 official build, but neither with my own VS9.0-compiled build, nor with the 3.2 official build.
To reproduce: >>> class T(tuple): pass ... >>> t = T((1,2)) >>> [] + t (1, 2) >>> [3,] + t # crash I tried to use the debugging symbols but it doesn't help a lot. The primary issue seems to be that the concatenation doesn't raise TypeError, and instead constructs an invalid object which then makes PyObject_Repr() crash. Also, it is not the Python compiler, the same thing happens with constructor calls: >>> list() + T([1,2]) (1, 2) >>> list((3,)) + T([1,2]) # crash And no it doesn't happen with list subclasses: >>> class L(list): pass ... >>> class T(tuple): pass ... >>> L([]) + T([1,2]) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can only concatenate list (not "T") to list >>> [] + T([1,2]) (1, 2) Also, directly calling the __add__ method doesn't trigger the issue, but operator.add does: >>> l + T([1,2]) (1, 2) >>> operator.add(list(), T([1,2])) (1, 2) >>> list().__add__(T([1,2])) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can only concatenate list (not "T") to list ---------- nosy: +brian.curtin, pitrou, tim.golden _______________________________________ 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
