Issue #10451: memoryview objects could allow to mutate a readable buffer.
Initial patch by Ross Lagerwall.
diff --git a/Lib/test/test_getargs2.py b/Lib/test/test_getargs2.py
index e8f4fc2..3d9c06a 100644
--- a/Lib/test/test_getargs2.py
+++ b/Lib/test/test_getargs2.py
@@ -381,8 +381,10 @@
         self.assertRaises(TypeError, getargs_w_star, 'abc\xe9')
         self.assertRaises(TypeError, getargs_w_star, b'bytes')
         self.assertRaises(TypeError, getargs_w_star, b'nul:\0')
+        self.assertRaises(TypeError, getargs_w_star, memoryview(b'bytes'))
         self.assertEqual(getargs_w_star(bytearray(b'bytearray')), b'[ytearra]')
-        self.assertEqual(getargs_w_star(memoryview(b'memoryview')), b'[emoryvie]')
+        self.assertEqual(getargs_w_star(memoryview(bytearray(b'memoryview'))),
+                         b'[emoryvie]')
         self.assertRaises(TypeError, getargs_w_star, None)