syntax error, looking for <str>, found <str> instead

  Explanation:  This is issued  with  a  RDO-F-BUGCHK  because  it
  indicates that a severe error has occurred in the syntax tables.

  User Action:  Contact your  Oracle  support  representative  for
  assistance.   You  will need to record the exact command line as
  typed (use EDIT to write it to a file).  Then consider finding a
  workaround.