[GR-20728] Pass through cls when constructing no-argument set

PullRequest: graalpython/787

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/set/SetNodes.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -93,7 +93,7 @@ PSet setString(VirtualFrame frame, LazyPythonClass cls, String arg,
         @SuppressWarnings("unused")
         PSet set(LazyPythonClass cls, PNone none,
                         @Shared("factory") @Cached PythonObjectFactory factory) {
-            return factory.createSet();
+            return factory.createSet(cls);
         }
 
         @Specialization(guards = "!isNoValue(iterable)")

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/runtime/object/PythonObjectFactory.java

@@ -453,10 +453,6 @@ public PList createList(LazyPythonClass cls, Object[] array) {
         return trace(new PList(cls, SequenceStorageFactory.createStorage(array)));
     }
 
-    public PSet createSet() {
-        return trace(new PSet(PythonBuiltinClassType.PSet));
-    }
-
     public PSet createSet(LazyPythonClass cls) {
         return trace(new PSet(cls));
     }