There is no longer a 'c' array typecode.
diff --git a/Lib/test/test_re.py b/Lib/test/test_re.py
index 1f4505f..f69dde5 100644
--- a/Lib/test/test_re.py
+++ b/Lib/test/test_re.py
@@ -596,7 +596,7 @@
     def test_empty_array(self):
         # SF buf 1647541
         import array
-        for typecode in 'cbBuhHiIlLfd':
+        for typecode in 'bBuhHiIlLfd':
             a = array.array(typecode)
             self.assertEqual(re.compile("bla").match(a), None)
             self.assertEqual(re.compile("").match(a).groups(), ())