diff --git a/jedi/evaluate/analysis.py b/jedi/evaluate/analysis.py
index 8287afc0..7dc27f01 100644
--- a/jedi/evaluate/analysis.py
+++ b/jedi/evaluate/analysis.py
@@ -18,6 +18,7 @@ CODES = {
     'type-error-star-star': (9, TypeError, None),
     'type-error-star': (10, TypeError, None),
     'type-error-operation': (11, TypeError, None),
+    'type-error-not-iterable': (12, TypeError, None),
 }
 
 
diff --git a/jedi/evaluate/iterable.py b/jedi/evaluate/iterable.py
index c6535655..d24922b8 100644
--- a/jedi/evaluate/iterable.py
+++ b/jedi/evaluate/iterable.py
@@ -389,6 +389,7 @@ def get_iterator_types(inputs):
             iterators.append(it)
         else:
             if not hasattr(it, 'execute_subscope_by_name'):
+                analysis.add(self._evaluator, 'type-error-generator', index_array)
                 debug.warning('iterator/for loop input wrong: %s', it)
                 continue
             try:
diff --git a/jedi/evaluate/stdlib.py b/jedi/evaluate/stdlib.py
index 25c1fc16..b25fe4cd 100644
--- a/jedi/evaluate/stdlib.py
+++ b/jedi/evaluate/stdlib.py
@@ -54,7 +54,7 @@ def _follow_param(evaluator, arguments, index):
         return iterable.unite(evaluator.eval_element(v) for v in values)
 
 
-def argument_clinic(string, want_obj=False, want_scope=False):
+def argument_clinic(string, want_obj=False, want_scope=False, want_arguments=False):
     """
     Works like Argument Clinic (PEP 436), to validate function params.
     """
@@ -87,6 +87,8 @@ def argument_clinic(string, want_obj=False, want_scope=False):
                     kwargs['scope'] = arguments.scope()
                 if want_obj:
                     kwargs['obj'] = obj
+                if want_obj:
+                    kwargs['arguments'] = arguments
                 return func(evaluator, *lst, **kwargs)
 
         return wrapper
@@ -146,9 +148,11 @@ def builtins_super(evaluator, types, objects, scope):
     return []
 
 
-@argument_clinic('sequence, /', want_obj=True)
-def builtins_reversed(evaluator, sequences, obj):
+@argument_clinic('sequence, /', want_obj=True, want_arguments=True)
+def builtins_reversed(evaluator, sequences, obj, arguments):
     # Unpack the iterator values
+    # TODO replace get_iterator_types.
+    #elements = list(arguments.unpack())[0][1]
     objects = tuple(iterable.get_iterator_types(sequences))
     rev = [iterable.AlreadyEvaluated([o]) for o in reversed(objects)]
     # Repack iterator values and then run it the normal way. This is