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
{
		assert resultClass != null;
		
		
		List cmptList = new ArrayList( );
		for ( int i = 0; i < ccList.size( ); i++ )
		{
			IComputedColumn cmptdColumn = (IComputedColumn) ccList.get( i );
			int cmptdColumnIdx = resultClass.getFieldIndex( cmptdColumn.getName( ) );
			
			
			if ( cmptdColumnIdx >= 1
					&& resultClass.isCustomField( cmptdColumnIdx ) )
				cmptList.add( new Integer( i ) );
			
			
		}
		int size = cmptList.size( );
		columnExprArray = new IBaseExpression[size];
		columnIndexArray = new int[size];
		for ( int i = 0; i < size; i++ )
		{
			int pos = ( (Integer) cmptList.get( i ) ).intValue( );
			IComputedColumn cmptdColumn = (IComputedColumn) ccList.get( pos );
			columnExprArray[i] = cmptdColumn.getExpression( );
			columnIndexArray[i] = resultClass.getFieldIndex( cmptdColumn.getName( ) );
		}
		isPrepared = true;
	}
}