Fix SF bug 572567: Memory leak in object comparison.

Lib/test/test_descr.py

@@ -1163,6 +1163,18 @@ def slots():
     gc.collect()
     vereq(Counted.counter, 0)
 
+    # Test lookup leaks [SF bug 572567]
+    import sys,gc
+    class G(object):
+        def __cmp__(self, other):
+            return 0
+    g = G()
+    orig_objects = len(gc.get_objects())
+    for i in xrange(10):
+        g==g
+    new_objects = len(gc.get_objects())
+    vereq(orig_objects, new_objects)
+
 def dynamics():
     if verbose: print "Testing class attribute propagation..."
     class D(object):

Misc/ACKS

@@ -233,6 +233,7 @@ John Interrante
 Ben Jackson
 Paul Jackson
 David Jacobs
+Kevin Jacobs
 Geert Jansen
 Jack Jansen
 Bill Janssen

Objects/typeobject.c

@@ -3286,6 +3286,7 @@ half_compare(PyObject *self, PyObject *other)
 			res = PyObject_Call(func, args, NULL);
 			Py_DECREF(args);
 		}
+		Py_DECREF(func);
 		if (res != Py_NotImplemented) {
 			if (res == NULL)
 				return -2;