first executions with compiled seem to be working

test/test_compiled.py

@@ -9,6 +9,7 @@ def test_simple():
     obj = compiled.PyObject('_str_', bltn)
     upper = e.find_types(obj, 'upper')
     assert len(upper) == 1
-    objs = e.execute(upper[0])
+    objs = list(e.execute(upper[0]))
     assert len(objs) == 1
-    assert isinstance(objs[0].obj, str)
+    assert objs[0].obj is str
+    assert objs[0].instantiated is True