Bug 135790 ClassCastException in RowData.
ClassCastException is thrown in RowData line 81(IBaseExpression expr = ( IBaseExpression ) valueExpressions.get( index - 1 );).
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/parser/EngineIRVisitor.java
}
		else
		{
			assert ( false );
		}
		return action;
	}
	/**
	 * create a highlight rule from a structure handle.
	 * 
	 * @param ruleHandle
	 *            rule in the MODEL.
	 * @return rule design, null if exist any error.
	 */
	protected HighlightRuleDesign createHighlightRule(
			StructureHandle ruleHandle, String defaultStr )
	{
		HighlightRuleDesign rule = new HighlightRuleDesign( );
		MemberHandle hOperator = ruleHandle