Not all relations purged from Relations Window and app crashes upon attempt to edit purged relation

[pmberry2007]

What steps will reproduce the problem?

1. Have a number of relations loaded into JOSM
2. Select some (not all) and purge them
3. One or two may remain in the Relations Window
4. Right-click → Edit any relation still showing that should not be there
5. Observe the error message ("an unexpected exception occurred")

What is the expected result?

All relations should have been removed from the Relations Window upon selecting and purging them.

What happens instead?

Not all relations are removed - the one or two that remain then cause the app to crash if an attempt is made to edit them.

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2024-12-02 20:14:56 +0100 (Mon, 02 Dec 2024)
Revision:19265
Build-Date:2024-12-03 02:30:34
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (19265 en_GB) Windows 10 64-Bit
OS Build number: Windows 10 Pro 22H2 (19045)
Memory Usage: 368 MB / 8116 MB (165 MB allocated, but free)
Java version: 21.0.3+9-LTS, Azul Systems, Inc., OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.nimbus.NimbusLookAndFeel
Screen: \Display0 1920x1080x32bpp@60Hz (scaling 1.50×1.50) \Display1 1440x900x32bpp@60Hz (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→48×48, 32×32→48×48
System property file.encoding: UTF-8
System property sun.jnu.encoding: Cp1252
Locale info: en_GB
Numbers with default locale: 1234567890 -> 1234567890
VM arguments: [-Dicedtea-web.bin.location=%UserProfile%\AppData\Local\Programs\OpenWebStart\javaws, -Djava.util.Arrays.useLegacyMergeSort=true, --add-reads=java.base=ALL-UNNAMED,java.desktop, --add-reads=java.desktop=ALL-UNNAMED,java.naming, --add-reads=java.naming=ALL-UNNAMED,java.desktop, --add-exports=java.desktop/sun.awt=ALL-UNNAMED,java.desktop, --add-exports=java.desktop/javax.jnlp=ALL-UNNAMED,java.desktop, --add-exports=java.base/com.sun.net.ssl.internal.ssl=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.net.www.protocol.jar=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.security.action=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.security.provider=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.security.util=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.security.validator=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.security.x509=ALL-UNNAMED,java.desktop, --add-exports=java.base/jdk.internal.util.jar=ALL-UNNAMED,java.desktop, --add-exports=java.base/sun.net.www.protocol.http=ALL-UNNAMED,java.desktop, --add-exports=java.desktop/sun.awt.X11=ALL-UNNAMED,java.desktop, --add-exports=java.desktop/sun.applet=ALL-UNNAMED,java.desktop,jdk.jsobject, --add-exports=java.naming/com.sun.jndi.toolkit.url=ALL-UNNAMED,java.desktop, --add-modules=java.scripting,java.sql,javafx.controls,javafx.media,javafx.swing,javafx.web, --add-exports=java.desktop/com.apple.eawt=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=javafx.graphics/com.sun.javafx.application=ALL-UNNAMED, --add-exports=jdk.deploy/com.sun.deploy.config=ALL-UNNAMED, --add-opens=java.base/java.lang=ALL-UNNAMED, --add-opens=java.base/java.nio=ALL-UNNAMED, --add-opens=java.base/jdk.internal.loader=ALL-UNNAMED, --add-opens=java.base/jdk.internal.ref=ALL-UNNAMED, --add-opens=java.desktop/javax.imageio.spi=ALL-UNNAMED, --add-opens=java.desktop/javax.swing.text.html=ALL-UNNAMED, --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED, -Djava.security.manager=allow]
Dataset consistency test: No problems found

Plugins:
+ PicLayer (1.0.3)
+ ShapeTools (1250)
+ reverter (36354)
+ terracer (36344)
+ undelete (36349)
+ utilsplugin2 (36354)

Last errors/warnings:
- 00000.545 W: extended font config - overriding 'filename.Malgun_Gothic=malgun.ttf' with 'MALGUN.TTF'
- 00000.547 W: extended font config - overriding 'filename.Myanmar_Text=mmrtext.ttf' with 'MMRTEXT.TTF'
- 00000.547 W: extended font config - overriding 'filename.Mongolian_Baiti=monbaiti.ttf' with 'MONBAITI.TTF'
- 00274.345 E: Handled by bug report queue: java.lang.NullPointerException: Cannot invoke "org.openstreetmap.josm.data.osm.DataSet.isLocked()" because the return value of "org.openstreetmap.josm.data.osm.Relation.getDataSet()" is null
- 22439.342 E: java.lang.IllegalStateException: JOSM expected to find primitive [relation 1351735] in dataset but it is not there. Please report this at https://josm.openstreetmap.de. This is not a critical error, it should be safe to continue in your work.
- 22440.651 E: java.lang.IllegalStateException: JOSM expected to find primitive [relation 1351735] in dataset but it is not there. Please report this at https://josm.openstreetmap.de. This is not a critical error, it should be safe to continue in your work.
- 22456.727 E: Handled by bug report queue: java.lang.NullPointerException: Cannot invoke "org.openstreetmap.josm.data.osm.DataSet.isLocked()" because the return value of "org.openstreetmap.josm.data.osm.Relation.getDataSet()" is null



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-1 (63) of JOSM
java.lang.NullPointerException: Cannot invoke "org.openstreetmap.josm.data.osm.DataSet.isLocked()" because the return value of "org.openstreetmap.josm.data.osm.Relation.getDataSet()" is null
	at org.openstreetmap.josm.gui.dialogs.relation.ReferringRelationsBrowserModel.canReload(ReferringRelationsBrowserModel.java:107)
	at org.openstreetmap.josm.gui.dialogs.relation.ReferringRelationsBrowser$ReloadAction.refreshEnabled(ReferringRelationsBrowser.java:122)
	at org.openstreetmap.josm.gui.dialogs.relation.ReferringRelationsBrowser$ReloadAction.<init>(ReferringRelationsBrowser.java:118)
	at org.openstreetmap.josm.gui.dialogs.relation.ReferringRelationsBrowser.build(ReferringRelationsBrowser.java:87)
	at org.openstreetmap.josm.gui.dialogs.relation.ReferringRelationsBrowser.<init>(ReferringRelationsBrowser.java:60)
	at org.openstreetmap.josm.gui.dialogs.relation.GenericRelationEditor.<init>(GenericRelationEditor.java:240)
	at org.openstreetmap.josm.gui.dialogs.relation.RelationEditor.getEditor(RelationEditor.java:83)
	at org.openstreetmap.josm.actions.relation.EditRelationAction.launchEditor(EditRelationAction.java:64)
	at org.openstreetmap.josm.actions.relation.EditRelationAction.actionPerformed(EditRelationAction.java:82)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2314)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:407)
	at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
	at java.desktop/javax.swing.AbstractButton.doClick(AbstractButton.java:374)
	at java.desktop/javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1029)
	at java.desktop/javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1073)
	at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:297)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6621)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3398)
	at java.desktop/java.awt.Component.processEvent(Component.java:6386)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4996)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4828)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4575)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4516)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4828)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:775)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:98)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:747)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:744)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)