public VariableStack mapStackToLocal(VariableStack stack) {
		if (stack == null)
			alterrs.jode.GlobalOptions.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
			return subBlocks[1].mapStackToLocal(middle);
		alterrs.jode.GlobalOptions.err.println("Dead code after Block "
				+ subBlocks[0]);
		return null;
	}