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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc18.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc18.vhd
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index 000000000..4d3f6b0c8
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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: tc18.vhd,v 1.2 2001-10-26 16:29:43 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c04s02b00x00p09n01i00018ent IS
+END c04s02b00x00p09n01i00018ent;
+
+ARCHITECTURE c04s02b00x00p09n01i00018arch OF c04s02b00x00p09n01i00018ent IS
+BEGIN
+  TESTING: PROCESS
+    -- Define a subtype.
+    subtype DEC is INTEGER range 1 to 10;
+
+    -- Define a subtype based on DEC.
+    subtype DEC2 is DEC;
+
+    -- Define two variable counters.
+    variable CNT1, CNT2 : INTEGER := 0;
+  BEGIN
+    -- Verify that the range of DEC is the same as DEC2.
+    for I in DEC loop
+      CNT1 := CNT1 + 1;
+    end loop;
+    for I in DEC2 loop
+      CNT2 := CNT2 + 1;
+    end loop;
+    assert NOT( CNT1 = CNT2 )
+      report "***PASSED TEST: c04s02b00x00p09n01i00018"
+      severity NOTE;
+    assert ( CNT1 = CNT2 )
+      report "***FAILED TEST: c04s02b00x00p09n01i00018 - If the subtype indication does not indicate a type constraint, the subtype is the same as that denoted by the type mark."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c04s02b00x00p09n01i00018arch;