Index: Objects/unicodeobject.c
===================================================================
--- Objects/unicodeobject.c	(révision 66059)
+++ Objects/unicodeobject.c	(copie de travail)
@@ -1354,20 +1354,23 @@
         goto onError;
     if (PyByteArray_Check(v)) {
         char msg[100];
+        PyObject *old_v;
         PyOS_snprintf(msg, sizeof(msg),
                       "encoder %s returned buffer instead of bytes",
                       encoding);
         if (PyErr_WarnEx(PyExc_RuntimeWarning, msg, 1) < 0) {
-            v = NULL;
             goto onError;
         }
+        old_v = v;
         v = PyBytes_FromStringAndSize(PyByteArray_AS_STRING(v), Py_SIZE(v));
+        Py_DECREF(old_v);
     }
     else if (!PyBytes_Check(v)) {
         PyErr_Format(PyExc_TypeError,
                      "encoder did not return a bytes object (type=%.400s)",
                      Py_TYPE(v)->tp_name);
-        v = NULL;
+        Py_DECREF(v);
+		goto onError;
     }
     return v;