diff --git a/jedi/evaluate/iterable.py b/jedi/evaluate/iterable.py
index b341ca9e..632ef72d 100644
--- a/jedi/evaluate/iterable.py
+++ b/jedi/evaluate/iterable.py
@@ -507,6 +507,10 @@ def _check_array_additions(evaluator, compare_array, module, is_list):
 
 def check_array_instances(evaluator, instance):
     """Used for set() and list() instances."""
+    
+    return instance.var_args
+
+
     if not settings.dynamic_arrays_instances:
         return instance.var_args
     ai = ArrayInstance(evaluator, instance)
@@ -531,7 +535,6 @@ class ArrayInstance(IterableWrapper):
         """
         items = []
         from jedi.evaluate.representation import Instance
-        return []
         for stmt in self.var_args:
             for typ in self._evaluator.eval_statement(stmt):
                 if isinstance(typ, Instance) and len(typ.var_args):
diff --git a/jedi/evaluate/representation.py b/jedi/evaluate/representation.py
index 43407c33..a117ef82 100644
--- a/jedi/evaluate/representation.py
+++ b/jedi/evaluate/representation.py
@@ -124,8 +124,7 @@ class Instance(use_metaclass(CachedMetaClass, Executed)):
     @memoize_default()
     def _get_method_execution(self, func):
         func = get_instance_el(self._evaluator, self, func, True)
-        args = param.Arguments(self._evaluator, self.var_args)
-        return FunctionExecution(self._evaluator, func, args)
+        return FunctionExecution(self._evaluator, func, self.var_args)
 
     def _get_func_self_name(self, func):
         """