diff --git a/jedi/evaluate/compiled/__init__.py b/jedi/evaluate/compiled/__init__.py
index 1a54501f..a74056ec 100644
--- a/jedi/evaluate/compiled/__init__.py
+++ b/jedi/evaluate/compiled/__init__.py
@@ -20,7 +20,8 @@ class CompiledValue(ContextWrapper):
         self._compiled_obj = compiled_obj
 
     def __getattribute__(self, name):
-        if name in ('get_safe_value', 'execute_operation', 'access_handle'):
+        if name in ('get_safe_value', 'execute_operation', 'access_handle',
+                    'negate'):
             return getattr(self._compiled_obj, name)
         return super(CompiledValue, self).__getattribute__(name)
 
@@ -33,7 +34,7 @@ def create_simple_object(evaluator, obj):
     Only allows creations of objects that are easily picklable across Python
     versions.
     """
-    assert type(obj) in (int, float, str, bytes, unicode, slice, complex)
+    assert type(obj) in (int, float, str, bytes, unicode, slice, complex, bool), obj
     compiled_obj = create_from_access_path(
         evaluator,
         evaluator.compiled_subprocess.create_simple_object(obj)
diff --git a/jedi/evaluate/context/iterable.py b/jedi/evaluate/context/iterable.py
index f7698f0b..d59f2e3f 100644
--- a/jedi/evaluate/context/iterable.py
+++ b/jedi/evaluate/context/iterable.py
@@ -295,9 +295,13 @@ class SequenceLiteralContext(Sequence):
             compiled_obj_index = compiled.create_simple_object(self.evaluator, index)
             for key, value in self.get_tree_entries():
                 for k in self._defining_context.eval_node(key):
-                    if isinstance(k, compiled.CompiledObject) \
-                            and k.execute_operation(compiled_obj_index, u'==').get_safe_value():
-                        return self._defining_context.eval_node(value)
+                    try:
+                        method = k.execute_operation
+                    except AttributeError:
+                        pass
+                    else:
+                        if method(compiled_obj_index, u'==').get_safe_value():
+                            return self._defining_context.eval_node(value)
             raise SimpleGetItemNotFound('No key found in dictionary %s.' % self)
 
         if isinstance(index, slice):