Add a test case.

Author: ZeroIntensity

Lib/test/test_types.py

@@ -711,6 +711,11 @@ def call(part):
         """
         assert_python_ok("-c", code)
 
+    def test_frame_locals_proxy(self):
+        frame = inspect.currentframe()
+        self.assertIsNotNone(frame)
+        self.assertIsInstance(frame.f_locals, types.FrameLocalsProxy)
+
 
 class UnionTests(unittest.TestCase):
 

Lib/types.py

@@ -69,7 +69,7 @@ def _m(self): pass
     EllipsisType = type(Ellipsis)
     NoneType = type(None)
     NotImplementedType = type(NotImplemented)
-    FrameLocalsProxy = (lambda: type(sys._getframe().f_locals)()
+    FrameLocalsProxy = (lambda: type(sys._getframe().f_locals))()
 
     # CapsuleType cannot be accessed from pure Python,
     # so there is no fallback definition.