OOB, related to #17889

[dolomynum@…]

What steps will reproduce the problem?

Trying to move down the first element (relation has 7 elements) in the Edit Relation dialogue

What is the expected result?

The first element is moved down to the second place

What happens instead?

Popup displayed

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

URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-07-08 01:14:04 +0200 (Mon, 08 Jul 2019)
Build-Date:2019-07-07 23:17:09
Revision:15234
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15234 en) Windows 10 64-Bit
OS Build number: Windows 10 Enterprise 1903 (18362)
Memory Usage: 551 MB / 989 MB (271 MB allocated, but free)
Java version: 1.8.0_211-b12, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 3440x1440
Maximum Screen Size: 3440x1440
Dataset consistency test: No problems found

Plugins:
+ reverter (34999)
+ turnrestrictions (34977)

Last errors/warnings:
- W: No configuration settings found.  Using hardcoded default values for all pools.
- E: Handled by bug report queue: java.lang.IndexOutOfBoundsException: Index: 7, Size: 7
- E: Handled by bug report queue: java.lang.IndexOutOfBoundsException: Index: 7, Size: 7
- E: Handled by bug report queue: java.lang.IndexOutOfBoundsException: bitIndex < 0: -1


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (15) of main
java.lang.IndexOutOfBoundsException: bitIndex < 0: -1
	at java.util.BitSet.set(Unknown Source)
	at org.openstreetmap.josm.gui.dialogs.relation.MemberTableModel.move(MemberTableModel.java:283)
	at org.openstreetmap.josm.gui.util.ReorderableTableModel.moveDown(ReorderableTableModel.java:108)
	at org.openstreetmap.josm.gui.dialogs.relation.actions.MoveDownAction.actionPerformed(MoveDownAction.java:35)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)

[skyper]

Closed as duplicate of #17894.