Add tests for ticket #674

tests/bugs.txt

@@ -18,6 +18,7 @@ temp_sideeffects_T654
 class_scope_T671
 slice2_T636
 builtin_subtype_methods_T653
+default_args_T674
 
 # CPython regression tests that don't current work:
 pyregr.test_threadsignals

tests/run/default_args_T674.py

+# mode: run
+# ticket: 674
+
+def test_inner(a):
+    """
+    >>> a = test_inner(1)
+    >>> b = test_inner(2)
+    >>> a()
+    1
+    >>> b()
+    2
+    """
+    def inner(b=a):
+        return b
+    return inner
+
+def test_lambda(n):
+    """
+    >>> [f() for f in test_lambda(3)]
+    [0, 1, 2]
+    """
+    return [lambda v=i: v for i in range(n)]