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
protected String getElementProperty( ReportElementHandle handle, String name )
	{
		return getElementProperty( handle, name, false );
	}
	protected String getElementProperty( ReportElementHandle handle,
			String name, boolean isColorProperty )
	{
		FactoryPropertyHandle prop = handle.getFactoryPropertyHandle( name );
		if ( prop != null && prop.isSet( ) )
		{
			if ( isColorProperty )
			{
				return prop.getColorValue( );
			}
			return prop.getStringValue( );
		}
		return null;
	}
	String getElementColorProperty( ReportElementHandle handle, String name )
	{
		FactoryPropertyHandle prop = handle.getFactoryPropertyHandle( name );
		if ( prop != null && prop.isSet( ) )
		{
			return prop.getColorValue( );
		}
		return null;
	}
	protected StyleDeclaration createPrivateStyle( ReportElementHandle handle )
	{
		return createPrivateStyle( handle, true );