more verbose error messages

changed copyright comment


git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@507 379699f6-c40d-0410-875b-85095c16579e

jode/jode/flow/SequentialBlock.java

@@ -1,20 +1,22 @@
-/* SequentialBlock (c) 1998 Jochen Hoenicke
+/* SequentialBlock Copyright (C) 1998-1999 Jochen Hoenicke.
  *
- * You may distribute under the terms of the GNU General Public License.
+ * 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; either version 2, or (at your option)
+ * any later version.
  *
- * IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
- * INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
- * THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE 
- * HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 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.
  *
- * JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
- * BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
- * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  *
  * $Id$
  */
+
 package jode.flow;
 import jode.decompiler.TabbedPrintWriter;
 import jode.expr.LocalStoreOperator;
@@ -60,6 +62,8 @@ public class SequentialBlock extends StructuredBlock {
      * @return stack the stack afterwards.
      */
     public VariableStack mapStackToLocal(VariableStack stack) {
+	if (stack == null)
+	    jode.Decompiler.err.println("map stack to local called with null: " + this+ " in "+this.flowBlock);
 	VariableStack middle = subBlocks[0].mapStackToLocal(stack);
 	if (middle != null)
 	    // Otherwise the second block is at least "logical" dead code