Fixed a bug in object.__reduce_ex__ (reduce_2) when using protocol

  2.  Failure to clear the error when attempts to get the __getstate__
  attribute fail caused intermittent errors and odd behavior.

Misc/NEWS

@@ -136,6 +136,10 @@ Core and builtins
   same as split() except that it scans the string from the end
   working towards the beginning.  See SF feature request 801847.
 
+- Fixed a bug in object.__reduce_ex__ when using protocol 2.  Failure
+  to clear the error when attempts to get the __getstate__ attribute
+  fail caused intermittent errors and odd behavior.
+
 Extension modules
 -----------------
 

Objects/typeobject.c

@@ -2581,6 +2581,7 @@ reduce_2(PyObject *obj)
 			goto end;
 	}
 	else {
+		PyErr_Clear();
 		state = PyObject_GetAttrString(obj, "__dict__");
 		if (state == NULL) {
 			PyErr_Clear();