Can you submit a bug at bugs.python.org? The minimal example I found:
>>> class a(int): pass ... >>> for i in range(0, a(5)): pass ... Traceback (most recent call last): File "<stdin>", line 1, in <module> SystemError: Objects/longobject.c:400: bad argument to internal function >>> On Dec 19, 2007 5:38 PM, Joseph Armbruster <[EMAIL PROTECTED]> wrote: > All, > > I posted this up to comp.lang.python earlier today and asked a few questions > around IRC. The general consensus appeared to be that this was a bug. Before > opening up an issue on it, I wanted to run it by this list first (just in > case) > Here is a copy / paste from comp.lang.python: > > URL: > > http://groups.google.com/group/comp.lang.python/browse_frm/thread/801f227fceff4066#e0305608a5931af1 > > Post: > > I was wondering what would happen, so I tried this out for the heck of it > with: > Python 3.0a2 (py3k:59572M, Dec 19 2007, 15:54:07) [MSC v.1500 32 bit (Intel)] > on win32 > > class a(int): > def __new__(cls,number): > return int.__new__(cls,number) > > for x in range(0,a(5)): > print(x) > > Which resulted in a: > > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "a.py", line 5, in <module> > for x in range(0,a(5)): > SystemError: ..\Objects\longobject.c:400: bad argument to internal > function > [41030 refs] > > It looks like the rangeobject performs a FitsInLong test on each of > the parameters to range, which uses the function > _PyLong_FitsInLong(PyObject *vv) within longobject.c. In tern, this > performs a typecheck: #define PyLong_CheckExact(op) (Py_TYPE(op) == > &PyLong_Type) that fails. > > Interesting! > _______________________________________________ > Python-Dev mailing list > Python-Dev@python.org > http://mail.python.org/mailman/listinfo/python-dev > Unsubscribe: > http://mail.python.org/mailman/options/python-dev/guido%40python.org > -- --Guido van Rossum (home page: http://www.python.org/~guido/) _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
