diff -r 16e3d240456f Modules/_json.c
--- a/Modules/_json.c	Fri Sep 05 01:10:29 2014 +0200
+++ b/Modules/_json.c	Fri Sep 05 01:27:08 2014 +0200
@@ -287,7 +287,7 @@ static PyObject *
             } \
         } \
         if (PyList_Append(chunks, chunk)) { \
-            Py_DECREF(chunk); \
+            Py_CLEAR(chunk); \
             goto bail; \
         } \
         Py_CLEAR(chunk); \
@@ -1555,6 +1555,7 @@ encoder_listencode_dict(PyEncoderObject 
             if (item == NULL)
                 goto bail;
             PyList_SET_ITEM(items, i, item);
+            item = NULL;
             Py_DECREF(key);
         }
     }