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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc2091.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc2091.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: tc2091.vhd,v 1.2 2001-10-26 16:29:45 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c07s02b04x00p20n01i02091ent IS
+END c07s02b04x00p20n01i02091ent;
+
+ARCHITECTURE c07s02b04x00p20n01i02091arch OF c07s02b04x00p20n01i02091ent IS
+
+  TYPE     bit_v is array (integer range <>) of bit;
+  SUBTYPE     bit_8 is bit_v (1 to 8);
+  SUBTYPE     bit_4 is bit_v (1 to 4);
+
+BEGIN
+  TESTING: PROCESS
+    variable result    : bit_4;
+    variable l_operand : bit_4 := ('1','0','1','0');
+    variable r_operand : bit_4 := ('0','0','1','1');
+    alias    l_alias   : bit_v (1 to 2) is l_operand (2 to 3);
+    alias    r_alias   : bit_v (1 to 2) is r_operand (3 to 4);
+  BEGIN
+    result := l_alias & r_alias;
+    wait for 5 ns;
+    assert NOT((result = ('0','1','1','1')) and (result(1) = '0'))
+      report "***PASSED TEST: c07s02b04x00p20n01i02091"
+      severity NOTE;
+    assert ((result = ('0','1','1','1')) and (result(1) = '0'))
+      report "***FAILED TEST: c07s02b04x00p20n01i02091 - Concatenation of two BOOLEAITses failed."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c07s02b04x00p20n01i02091arch;