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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc1647.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc1647.vhd
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+
+-- Copyright (C) 2001 Bill Billowitch.
+
+-- Some of the work to develop this test suite was done with Air Force
+-- support. The Air Force and Bill Billowitch assume no
+-- responsibilities for this software.
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version.
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+-- for more details.
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: tc1647.vhd,v 1.2 2001-10-26 16:29:42 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c08s13b00x00p03n01i01647ent IS
+END c08s13b00x00p03n01i01647ent;
+
+ARCHITECTURE c08s13b00x00p03n01i01647arch OF c08s13b00x00p03n01i01647ent IS
+
+BEGIN
+ TESTING: PROCESS
+ variable k : boolean := true;
+ variable kk: integer := 0;
+ BEGIN
+ case k is
+ when false => NULL;
+ when true => NULL;
+ kk := 5;
+ end case;
+ assert NOT(kk=5)
+ report "***PASSED TEST: c08s13b00x00p03n01i01647"
+ severity NOTE;
+ assert (kk=5)
+ report "***FAILED TEST: c08s13b00x00p03n01i01647 - The execution of the null statement has no effect other than to pass on to the next statement."
+ severity ERROR;
+ wait;
+ END PROCESS TESTING;
+
+END c08s13b00x00p03n01i01647arch;