Starting Help browser failed

[tony.shield999@…]

What steps will reproduce the problem?

1. Help Tab
2. Select Help Browser

What is the expected result? The help browser opens

What happens instead? Bug exception is thrown in separate pane with invite to report bug

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2026-08-11 15:36:21 +0200 (Tue, 11 Aug 2026)
Revision:19613
Build-Date:2026-08-12 01:30:51
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (19613 en_GB) Linux Mint 22.3
Memory Usage: 1016 MB / 3828 MB (261 MB allocated, but free)
Java version: 21.0.12.1+1-1-24.04.4-Ubuntu, Ubuntu, OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 1920x1080x[Multi depth]@60Hz (scaling 1.00×1.00)
Maximum Screen Size: 1920×1080
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_GB.UTF-8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_GB
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: X-Cinnamon
Java package: openjdk-21-jre:amd64-21.0.12.1+1-1~24.04.4
WebStart package: icedtea-netx:all-1.8.8-2ubuntu1
fonts-noto: fonts-noto:-
VM arguments: [--patch-module=java.desktop=/usr/share/icedtea-web/javaws.jar:, --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, --add-exports=java.desktop/sun.applet=ALL-UNNAMED,jdk.jsobject, --add-exports=java.naming/com.sun.jndi.toolkit.url=ALL-UNNAMED,java.desktop, -Dicedtea-web.bin.name=javaws, -Dicedtea-web.bin.location=/usr/share/icedtea-web/bin/javaws.sh, -Djava.security.manager, -Djava.security.policy=/etc/icedtea-web/javaws.policy]
Dataset consistency test: No problems found

Plugins:
+ BuildingGeneralization (60)
+ ColorPlugin (47)
+ ShapeTools (75)
+ buildings_tools (36503)
+ fhrsPlugin (0.2)
+ imagery_offset_db (36503)
+ indoorhelper (269)
+ terracer (36503)
+ uberterracer (1718732356)
+ utilsplugin2 (36503)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/BuildingPreset&zip=1

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Postcode&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_buildings_en&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/SidewalksAndFootways&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/SimpleBuildingTags&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/SimpleRoofTags&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PublicTransportV2&zip=1
- <josm.userdata>/plugins/indoorhelper/resources/sit.mapcss

Last errors/warnings:
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 70435.669 W: java.io.IOException: Attribution is not loaded yet
- 71193.849 E: Handled by bug report queue: java.lang.reflect.InaccessibleObjectException: Unable to make field private java.awt.Image javax.swing.text.html.ImageView.image accessible: module java.desktop does not "opens javax.swing.text.html" to unnamed module @31954616
- 71213.924 E: Handled by bug report queue: java.lang.reflect.InaccessibleObjectException: Unable to make field private java.awt.Image javax.swing.text.html.ImageView.image accessible: module java.desktop does not "opens javax.swing.text.html" to unnamed module @31954616



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-1 (62) of JOSM
java.lang.reflect.InaccessibleObjectException: Unable to make field private java.awt.Image javax.swing.text.html.ImageView.image accessible: module java.desktop does not "opens javax.swing.text.html" to unnamed module @31954616
	at java.base/java.lang.reflect.AccessibleObject.throwInaccessibleObjectException(AccessibleObject.java:391)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:367)
	at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:315)
	at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:183)
	at java.base/java.lang.reflect.Field.setAccessible(Field.java:177)
	at org.openstreetmap.josm.tools.ReflectionUtils.lambda$setObjectsAccessible$0(ReflectionUtils.java:32)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:319)
	at org.openstreetmap.josm.tools.ReflectionUtils.setObjectsAccessible(ReflectionUtils.java:29)
	at org.openstreetmap.josm.gui.widgets.JosmImageView.<init>(JosmImageView.java:50)
	at org.openstreetmap.josm.gui.widgets.JosmHTMLFactory.create(JosmHTMLFactory.java:29)
	at java.desktop/javax.swing.text.html.TableView.create(TableView.java:942)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:110)
	at java.desktop/javax.swing.text.FlowView$LogicalView.loadChildren(FlowView.java:722)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.FlowView.loadChildren(FlowView.java:147)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.FlowView.setParent(FlowView.java:297)
	at java.desktop/javax.swing.text.html.ParagraphView.setParent(ParagraphView.java:75)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.html.BlockView.setParent(BlockView.java:72)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.html.TableView$RowView.replace(TableView.java:1471)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.html.TableView.replace(TableView.java:913)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.html.TableView.setParent(TableView.java:817)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.html.BlockView.setParent(BlockView.java:72)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.html.BlockView.setParent(BlockView.java:72)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.html.BlockView.setParent(BlockView.java:72)
	at java.desktop/javax.swing.text.html.HTMLEditorKit$HTMLFactory$BodyBlockView.setParent(HTMLEditorKit.java:1548)
	at java.desktop/javax.swing.text.CompositeView.replace(CompositeView.java:217)
	at java.desktop/javax.swing.text.BoxView.replace(BoxView.java:182)
	at java.desktop/javax.swing.text.CompositeView.loadChildren(CompositeView.java:112)
	at java.desktop/javax.swing.text.CompositeView.setParent(CompositeView.java:137)
	at java.desktop/javax.swing.text.html.BlockView.setParent(BlockView.java:72)
	at java.desktop/javax.swing.plaf.basic.BasicTextUI$RootView.setView(BasicTextUI.java:1445)
	at java.desktop/javax.swing.plaf.basic.BasicTextUI.setView(BasicTextUI.java:726)
	at java.desktop/javax.swing.plaf.basic.BasicTextUI.modelChanged(BasicTextUI.java:715)
	at java.desktop/javax.swing.plaf.basic.BasicTextUI$UpdateHandler.propertyChange(BasicTextUI.java:1911)
	at java.desktop/java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:343)
	at java.desktop/java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:335)
	at java.desktop/java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:268)
	at java.desktop/java.awt.Component.firePropertyChange(Component.java:8717)
	at java.desktop/javax.swing.text.JTextComponent.setDocument(JTextComponent.java:452)
	at org.openstreetmap.josm.gui.help.HelpBrowser.loadTopic(HelpBrowser.java:236)
	at org.openstreetmap.josm.gui.help.HelpBrowser.loadRelativeHelpTopic(HelpBrowser.java:332)
	at org.openstreetmap.josm.gui.help.HelpBrowser.openHelpTopic(HelpBrowser.java:411)
	at org.openstreetmap.josm.gui.help.HelpBrowser.lambda$setUrlForHelpTopic$1(HelpBrowser.java:116)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
	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.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
	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)