Bug 183308 IllegalArgumentException occurs after insert a empty group on a List report item[0001]
Description: IllegalArgumentException occurs after insert a empty group on a List report item[0001] Build number: 2.2.0.v20070419-0945 Steps to reproduce: 1, Insert a list 2, Insert a group on the list, only specify the Group On: "aa" Expected result: No exception Actual result: IllegalArgumentException occurs Error log: java.lang.IllegalArgumentException: Argument cannot be null at org.eclipse.swt.SWT.error(SWT.java:3483) at org.eclipse.swt.SWT.error(SWT.java:3422) at org.eclipse.swt.SWT.error(SWT.java:3393) at org.eclipse.swt.widgets.Widget.error(Widget.java:432) at org.eclipse.swt.widgets.Text.setText(Text.java:1793) at org.eclipse.birt.report.designer.ui.dialogs.GroupDialog$6.focusLost(GroupDialog.java:485) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:136) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:938) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:962)
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/GroupDialog.java
pagebreakInsideCombo.select( index );
		}
		if ( inputGroup.repeatHeader( ) )
		{
			repeatHeaderButton.setSelection( true );
		}
		hideDetail.setSelection( inputGroup.hideDetail( ) );
		return true;
	}
	private void refreshColumnList( )
	{
		String selected = keyChooser.getText( );
		keyChooser.removeAll( );
		columnList = DEUtil.getVisiableColumnBindingsList( inputGroup );
		Iterator itor = columnList.iterator( );
		while ( itor.hasNext( ) )
		{
			keyChooser.add( ( (ComputedColumnHandle) itor.next( ) ).getName( ) );
		}
		int newIndex = keyChooser.indexOf( selected );
		if ( newIndex != -1 )
		{
			keyChooser.select( newIndex );
		}
		else
		{
			keyChooser.setText( selected );
		}
	}
	private int getPagebreakAfterIndex( String pageBreakAfter )