Fix an issue with combinations of InstanceElement and Lambdas.

jedi/evaluate/__init__.py

@@ -176,8 +176,10 @@ class Evaluator(object):
         elif isinstance(element, pr.Keyword):
             # For False/True/None
             return [compiled.builtin.get_by_name(element.value)]
-        elif isinstance(element, pr.Lambda):
+        elif element.isinstance(pr.Lambda):
             return [er.LambdaWrapper(self, element)]
+        elif element.isinstance(er.LambdaWrapper):
+            return [element]  # TODO this is no real evaluation.
         elif element.type == 'power':
             types = self._eval_atom(element.children[0])
             for trailer in element.children[1:]: