diff --git a/jedi/evaluate/iterable.py b/jedi/evaluate/iterable.py
index 3847a31f..32a185ea 100644
--- a/jedi/evaluate/iterable.py
+++ b/jedi/evaluate/iterable.py
@@ -519,10 +519,10 @@ def py__getitem__(evaluator, types, index, node):
             try:
                 result |= getitem(index)
             except IndexError:
-                return py__iter__types(evaluator, set([typ]))
+                result |= py__iter__types(evaluator, set([typ]))
             except KeyError:
                 # Must be a dict. Lists don't raise IndexErrors.
-                return typ.values()
+                result |= typ.values()
     return result
 
 
diff --git a/jedi/evaluate/representation.py b/jedi/evaluate/representation.py
index ff0626ba..3b58ef2a 100644
--- a/jedi/evaluate/representation.py
+++ b/jedi/evaluate/representation.py
@@ -198,21 +198,15 @@ class Instance(use_metaclass(CachedMetaClass, Executed)):
         for names_dict in self.base.names_dicts(search_global=False, is_instance=True):
             yield LazyInstanceDict(self._evaluator, self, names_dict)
 
-    def get_index_types(self, evaluator, index_array):
-        indexes = iterable.create_indexes_or_slices(self._evaluator, index_array)
-        if any([isinstance(i, iterable.Slice) for i in indexes]):
-            # Slice support in Jedi is very marginal, at the moment, so just
-            # ignore them in case of __getitem__.
-            # TODO support slices in a more general way.
-            indexes = []
-
+    def py__getitem__(self, index):
         try:
             method = self.get_subscope_by_name('__getitem__')
         except KeyError:
             debug.warning('No __getitem__, cannot access the array.')
             return set()
         else:
-            return self._evaluator.execute(method, [iterable.AlreadyEvaluated(indexes)])
+            index_obj = compiled.create(self._evaluator, index)
+            return self._evaluator.execute_evaluated(method, index_obj)
 
     def py__iter__(self):
         try:
diff --git a/test/completion/arrays.py b/test/completion/arrays.py
index 14ef990b..8cb9f3a1 100644
--- a/test/completion/arrays.py
+++ b/test/completion/arrays.py
@@ -41,11 +41,11 @@ b[int():]
 
 
 class _StrangeSlice():
-    def __getitem__(self, slice):
-        return slice
+    def __getitem__(self, sliced):
+        return sliced
 
 # Should not result in an error, just because the slice itself is returned.
-#? []
+#? slice()
 _StrangeSlice()[1:2]