IOOBE: Relation dialog: removing members refering to selection

[skyper]

What steps will reproduce the problem?

1. Have two relations with some members in common.
2. select all members of one relation.
3. Open other relation in relation manager.
4. remove all members reffering to selection with last button of selection tab.

What is the expected result?

Selected members are removed.

What happens instead?

IOOBE.
Selected members are removed but not updated in relation dialog

Please provide any additional information below. Attach a screenshot if possible.

Regression still not fixed

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-07-15 22:22:57 +0200 (Mon, 15 Jul 2019)
Build-Date:2019-07-16 01:30:52
Revision:15251
Relative:URL: ^/trunk

Last errors/warnings:
- E: Handled by bug report queue: java.lang.IndexOutOfBoundsException: Index: 26, Size: 26


=== REPORTED CRASH DATA ===
BugReportExceptionHandler#handleException:
No data collected.

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (16) of main
java.lang.IndexOutOfBoundsException: Index: 26, Size: 26
	at java.util.ArrayList.rangeCheck(ArrayList.java:657)
	at java.util.ArrayList.get(ArrayList.java:433)
	at org.openstreetmap.josm.gui.dialogs.relation.MemberTableModel.getSelectedMembers(MemberTableModel.java:520)
	at org.openstreetmap.josm.gui.dialogs.relation.MemberTableModel.hasIncompleteSelectedMembers(MemberTableModel.java:411)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.DownloadSelectedIncompleteMembersAction.updateEnabledState(DownloadSelectedIncompleteMembersAction.java:46)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.AbstractRelationEditorAction.tableChanged(AbstractRelationEditorAction.java:76)
	at javax.swing.table.AbstractTableModel.fireTableChanged(AbstractTableModel.java:296)
	at javax.swing.table.AbstractTableModel.fireTableDataChanged(AbstractTableModel.java:198)
	at org.openstreetmap.josm.gui.dialogs.relation.MemberTableModel.removeMembersReferringTo(MemberTableModel.java:351)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.RemoveSelectedAction.actionPerformed(RemoveSelectedAction.java:42)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:289)
	at java.awt.Component.processMouseEvent(Component.java:6533)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
	at java.awt.Component.processEvent(Component.java:6298)
	at java.awt.Container.processEvent(Container.java:2238)
	at java.awt.Component.dispatchEventImpl(Component.java:4889)
	at java.awt.Container.dispatchEventImpl(Container.java:2296)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4897)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4534)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4475)
	at java.awt.Container.dispatchEventImpl(Container.java:2282)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
	at java.awt.EventQueue$4.run(EventQueue.java:733)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)