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diff --git a/lib_internal/coreassert.h b/lib_internal/coreassert.h
new file mode 100644
index 0000000..d52ac9b
--- /dev/null
+++ b/lib_internal/coreassert.h
@@ -0,0 +1,42 @@
+// $Id: coreassert.h,v 1.2 2005/03/22 14:59:46 ensc Exp $    --*- c -*--
+
+// Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//  
+// This program 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; version 2 of the License.
+//  
+// This program 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 this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifndef H_UTILVSERVER_LIB_INTERNAL_COREASSERT_H
+#define H_UTILVSERVER_LIB_INTERNAL_COREASSERT_H
+
+#ifndef ENSC_TESTSUITE
+#  error Do not use <coreassert.h> outside of testenvironemnts!
+#endif
+
+#include "lib_internal/util-io.h"
+
+#include <assert.h>
+#include <unistd.h>
+
+#undef assert
+#define ASSERT_STRX(X)	#X
+#define ASSERT_STR(X)	ASSERT_STRX(X)
+#define ASSERT_WRITE(X)	Vwrite(2, (X), sizeof(X)-1)
+#define assert(X)					\
+  (!(X)) ?						\
+  ASSERT_WRITE(__FILE__ ":" ASSERT_STR(__LINE__)	\
+	       " Assertion: '" #X "' failed\n"),	\
+  *(char *)(0)=0 : 0
+
+
+#endif	//  H_UTILVSERVER_LIB_INTERNAL_COREASSERT_H