Bug #1575169: operator.isSequenceType() now returns False for subclasses of dict.
diff --git a/Objects/abstract.c b/Objects/abstract.c
index 7115c52..7462c58 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -1157,6 +1157,8 @@
 {
 	if (s && PyInstance_Check(s))
 		return PyObject_HasAttrString(s, "__getitem__");
+	if (PyObject_IsInstance(s, &PyDict_Type))
+		return 0;
 	return s != NULL && s->ob_type->tp_as_sequence &&
 		s->ob_type->tp_as_sequence->sq_item != NULL;
 }