diff --git "a/.\\Python-3.5.0rc1/Lib/test/test_time.py" "b/.\\Python-3.5.0rc1/Lib/test/test_time.py"
index 6334e02..3f571a0 100644
--- "a/.\\Python-3.5.0rc1/Lib/test/test_time.py"
+++ "b/.\\Python-3.5.0rc1/Lib/test/test_time.py"
@@ -174,6 +174,12 @@ class TimeTestCase(unittest.TestCase):
     def test_strftime_bounding_check(self):
         self._bounds_checking(lambda tup: time.strftime('', tup))
 
+    def test_strftime_format_check(self):
+        for x in [ '', 'A', '%A', '%AA' ]:
+            for y in range(0x0, 0x10):
+                for z in [ '%', 'A%', 'AA%', '%A%', 'A%A%', '%#' ]:
+                    self.assertRaises(ValueError, time.strftime, x * y + z)
+
     def test_default_values_for_zero(self):
         # Make sure that using all zeros uses the proper default
         # values.  No test for daylight savings since strftime() does
diff --git "a/.\\Python-3.5.0rc1/Modules/timemodule.c" "b/.\\Python-3.5.0rc1/Modules/timemodule.c"
index 197d2c0..bdc21ef 100644
--- "a/.\\Python-3.5.0rc1/Modules/timemodule.c"
+++ "b/.\\Python-3.5.0rc1/Modules/timemodule.c"
@@ -623,6 +623,12 @@ time_strftime(PyObject *self, PyObject *args)
             Py_DECREF(format);
             return NULL;
         }
+        else if (outbuf[1] == NULL)
+        {
+            PyErr_SetString(PyExc_ValueError, "incomplete format");
+            Py_DECREF(format);
+            return NULL;
+        }
     }
 #elif (defined(_AIX) || defined(sun)) && defined(HAVE_WCSFTIME)
     for(outbuf = wcschr(fmt, '%');
@@ -635,6 +641,9 @@ time_strftime(PyObject *self, PyObject *args)
             PyErr_SetString(PyExc_ValueError,
                             "format %y requires year >= 1900 on AIX");
             return NULL;
+        } else if (outbuf[1] == NULL) {
+            PyErr_SetString(PyExc_ValueError, "incomplete format");
+            return NULL;
         }
     }
 #endif