Bug 153507 Bogus error when bad data set column referenced in group key
Run attached report design. Its group key binding column, "groupkey", is defined to refer to a non-existing data set column: dataSetRow["bad"]. However the actual error seen when previewing the report in BIRT designer: Table (id = 6): + A BIRT exception occurred: Error evaluating Javascript expression. Script engine error: TypeError: valueOf is not a function. Script source: null, line: 0, text: <compiled script>. See next exception for more information. Error evaluating Javascript expression. Script engine error: TypeError: valueOf is not a function. Script source: null, line: 0, text: <compiled script> This error is completely irrelevant to the actual cause of the problem.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ComputedColumnHelper.java
public ComputedColumnHelperInstance( DataSetRuntime dataSet,
			List computedColumns )
	{
		
		
		this.ccList = new ArrayList( );
		for ( int i = 0; i < computedColumns.size( ); i++ )
			this.ccList.add( computedColumns.get( i ) );
		this.isPrepared = false;
		this.dataSet = dataSet;
	}
	public List getComputedColumnList( )
	{
		return this.ccList;
	}
	/*
	 * @see org.eclipse.birt.data.engine.odi.IResultObjectEvent#process(org.eclipse.birt.data.engine.odi.IResultObject)
	 */
	public boolean process( IResultObject resultObject, int rowIndex )
			throws DataException
	{
		logger.entering( ComputedColumnHelper.class.getName( ), "process" );
		assert resultObject != null;
		IResultClass resultClass = resultObject.getResultClass( );
		if ( isPrepared == false )
			prepare( resultClass );
		
		
		if ( columnExprArray.length == 0 )
		{