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/QueryExecutor.java
String groupName = "";
				if ( expr.trim( ).equalsIgnoreCase( "row[0]" )
						|| expr.trim( )
								.equalsIgnoreCase( "row._rowPosition" )
						|| expr.trim( ).equalsIgnoreCase( "dataSetRow[0]" )
						|| expr.trim( )
								.equalsIgnoreCase( "dataSetRow._rowPosition" ) )
				{
					groupName = "_{$TEMP_GROUP_" + i + "ROWID$}_";
				}
				else
				{
					groupName = "_{$TEMP_GROUP_" + i + "$}_";
				}
				
				if ( ( src.getInterval( ) != IGroupDefinition.NO_INTERVAL )
						&& ( src.getIntervalRange( ) != 0 ) )
				{
					try
					{						
						expr = ExpressionUtil.createGroupByExpression( src.getInterval( ),
								src.getIntervalStart( ),
								getGroupKeyExpression( src ),
								src.getIntervalRange( ),
								getColumnDataType(cx, expr));
						
					}
					catch(BirtException be)
					{
						throw DataException.wrap( be );