New test for #409

tests/bugs.txt

@@ -8,3 +8,4 @@ unsignedbehaviour_T184
 funcexc_iter_T228
 bad_c_struct_T252
 missing_baseclass_in_predecl_T262
+extended_unpacking_T409

tests/run/extended_unpacking_T409.pyx

+__doc__ = """
+    >>> simple()
+    (1, 2, [1, 2], [1, 2])
+    >>> extended()
+    (1, (), 2, [1, 2], [1, 2])
+"""
+
+def simple():
+    a, c = d = e = [1,2]
+    return a, c, d, e
+
+def extended():
+    a, *b, c = d = e = [1,2]
+    return a, b, c, d, e