Fix for bug #966623 - classes created with type() in an exec(, {}) don't

have a __module__. Test for this case.

Bugfix candidate, will backport.

Misc/NEWS

@@ -12,6 +12,10 @@ What's New in Python 2.4 alpha 1?
 Core and builtins
 -----------------
 
+- Bug #966623. classes created with type() in an exec(, {}) don't
+  have a __module__, but code in typeobject assumed it would always
+  be there.
+
 - Python no longer relies on the LC_NUMERIC locale setting to be
   the "C" locale; as a result, it no longer tries to prevent changing
   the LC_NUMERIC category.

Objects/typeobject.c

@@ -87,6 +87,10 @@ type_module(PyTypeObject *type, void *context)
 
 	if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) {
 		mod = PyDict_GetItemString(type->tp_dict, "__module__");
+		if (!mod) { 
+			PyErr_Format(PyExc_AttributeError, "__module__");
+			return 0;
+		}
 		Py_XINCREF(mod);
 		return mod;
 	}