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An object with __call__ as an attribute, when called, will have that attribute checked for __call__ itself, and will continue to look until it finds an object without the attribute. This can lead to an infinite recursion.

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Closes bug #532646, again.  Will be backported.
This commit is contained in:
Brett Cannon 2006-06-09 22:31:23 +00:00
parent b2afe855e5
commit 22565aac3b
4 changed files with 30 additions and 9 deletions
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8
Objects/abstract.c
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@ -1790,7 +1790,15 @@ PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw)
ternaryfunc call;
if ((call = func->ob_type->tp_call) != NULL) {
/* slot_tp_call() will be called and ends up calling
PyObject_Call() if the object returned for __call__ has
__call__ itself defined upon it. This can be an infinite
recursion if you set __call__ in a class to an instance of
it. */
if (Py_EnterRecursiveCall(" in __call__"))
return NULL;
PyObject *result = (*call)(func, arg, kw);
Py_LeaveRecursiveCall();
if (result == NULL && !PyErr_Occurred())
PyErr_SetString(
PyExc_SystemError,