Toad crashes when displaying XMLTYPE within object type (4329691)

Steps to reproduce:

1. create a test type
   CREATE TYPE t_test_xml_type IS OBJECT (xml_doc sys.xmltype);
   /

• create a table with a test type column
  CREATE TABLE test_xml_type_table (test_id INTEGER, test_xml_obj t_test_xml_type);
  /

• insert testdata into the table
  INSERT INTO test_xml_type_table (test_id, test_xml_obj) VALUES (1, t_test_xml_type(xmltype('<Testentry />')));

• printing it to dbms_output -> works fine:
  begin
  for res in(SELECT * FROM test_xml_type_table) loop
  dbms_output.put_line(res.test_xml_obj.xml_doc.getclobval);
  end loop;
  end;

• show result in Data Grid -> Toad crashes
  SELECT * FROM test_xml_type_table;

WORKAROUND:
None

STATUS:
Waiting for a fix to be released in a future version of Toad for Oracle.