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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc1080.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc1080.vhd
new file mode 100644
index 000000000..d69dddab9
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+++ b/testsuite/vests/vhdl-93/billowitch/compliant/tc1080.vhd
@@ -0,0 +1,64 @@
+
+-- 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: tc1080.vhd,v 1.2 2001-10-26 16:29:38 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c06s05b00x00p01n02i01080ent IS
+END c06s05b00x00p01n02i01080ent;
+
+ARCHITECTURE c06s05b00x00p01n02i01080arch OF c06s05b00x00p01n02i01080ent IS
+  SUBTYPE    bit_vector_4 is bit_vector ( 0 to 3 );
+  SUBTYPE    bit_vector_8 is bit_vector ( 0 to 7 );
+  SIGNAL   result  : boolean;
+
+  CONSTANT    v_slice : bit_vector_8 := B"1010_1100";   
+
+  procedure subprogram ( constant v : in bit_vector_4; signal resultt : out boolean ) is
+  begin
+    if (v = "1010") then
+      resultt <= true;
+    else
+      resultt <= false;
+    end if;
+  end ;
+
+BEGIN
+  TESTING: PROCESS
+  BEGIN
+    subprogram ( v_slice ( 0 to 3 ), result );
+    wait for 11 ns;
+    assert NOT(result = true)
+      report "***PASSED TEST: c06s05b00x00p01n02i01080"
+      severity NOTE;
+    assert (result = true)
+      report "***FAILED TEST: c06s05b00x00p01n02i01080 - A slice of a constant should still be a constant."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c06s05b00x00p01n02i01080arch;