Bug 189806 Add aggregation data item to a table - Exception is thrown
- Add a table with dataset to a report design - DnD aggregation from palette to the table footer - Aggregation builder is shown - Choose SUM function on "Quantity orderred" data field Current behavior - A exception is thrown which say java.util.EmptyStackException
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/dialogs/CrosstabBindingDialogHelper.java
String argName = (String) iterator.next( );
					Label lblArg = new Label( argsComposite, SWT.NONE );
					lblArg.setText( argName + ":" );
					lblArg.setLayoutData( new GridData( GridData.FILL_HORIZONTAL
							| GridData.GRAB_HORIZONTAL ) );
					Text txtArg = new Text( argsComposite, SWT.BORDER );
					GridData gridData = new GridData( );
					gridData.widthHint = txtFilter.getBounds( ).width - 9;
					txtArg.setLayoutData( gridData );
					createExpressionButton( argsComposite, txtArg );
					argsMap.put( argName, txtArg );
				}
			}
			else
			{
				( (GridData) argsComposite.getLayoutData( ) ).heightHint = 0;
				
			}
		}
		else
		{
			( (GridData) argsComposite.getLayoutData( ) ).heightHint = 0;
			
			
		}
		argsComposite.layout( );
		composite.layout( );
		dialog.getShell( ).layout( );
	}
	private void createExpressionButton( final Composite parent, final Text text )