Having an image in clipboard crashes JOSM

[anonymous]

What steps will reproduce the problem?

1. Copy an image to your clipboard (I took a screenshot with Spectacle on KDE, which copies the screenshot to my clipboard apparently).
2. Try to File > Download Object or Windwos > Changeset manager (this is hwere I report it from)

What is the expected result?

There is no crash.

What happens instead?

The actions launched by these commands crash.

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

AI suggests it is because my JAVA is too new, not sure about it. But it correctly advised me that clipboard was the problem.

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2026-01-31 13:00:34 +0100 (Sat, 31 Jan 2026)
Revision:19481
Build-Date:2026-02-01 02:30:45
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (19481 en) Linux Fedora Linux 43 (KDE Plasma Desktop Edition)
Memory Usage: 528 MB / 16008 MB (190 MB allocated, but free)
Java version: 26-ea+32, Red Hat, Inc., OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: :0.0 2182x1227x[Multi depth]@60Hz (scaling 2.00×2.00) :0.1 2560x1440x[Multi depth]@60Hz (scaling 2.00×2.00) :0.2 3840x2160x[Multi depth]@60Hz (scaling 2.00×2.00)
Maximum Screen Size: 3840×2160
Best cursor sizes: 16×16→16×16, 32×32→32×32
Environment variable LANG: en_US.UTF-8
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_US
Numbers with default locale: 1234567890 -> 1234567890
Desktop environment: KDE
VM arguments: [--add-exports=java.base/sun.security.action=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=ALL-UNNAMED, -Djava.util.prefs.userRoot=/java]
Dataset consistency test: No problems found

Plugins:
+ FastDraw (36474)
+ apache-commons (36474)
+ ejml (36474)
+ geotools (36474)
+ imagery_offset_db (36474)
+ jackson (36474)
+ jaxb (36474)
+ jts (36474)
+ opendata (36474)
+ pbf (36474)
+ scripting (v0.3.5)
+ utilsplugin2 (36474)

Last errors/warnings:
- 00026.184 E: Handled by bug report queue: java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction. Cause: java.lang.ClassNotFoundException: sun.security.action.GetPropertyAction
- 00041.386 E: Handled by bug report queue: java.lang.NoClassDefFoundError: Could not initialize class com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter. Cause: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction [in thread "AWT-EventQueue-0"]
- 00054.432 E: Handled by bug report queue: java.lang.NoClassDefFoundError: Could not initialize class com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter. Cause: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction [in thread "AWT-EventQueue-0"]
- 00070.991 E: Handled by bug report queue: java.lang.NoClassDefFoundError: Could not initialize class com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter. Cause: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction [in thread "AWT-EventQueue-0"]
- 00280.514 E: Handled by bug report queue: java.lang.NoClassDefFoundError: Could not initialize class com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter. Cause: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction [in thread "AWT-EventQueue-0"]
- 00287.959 E: Handled by bug report queue: java.lang.NoClassDefFoundError: Could not initialize class com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter. Cause: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction [in thread "AWT-EventQueue-0"]



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (54) of main
java.lang.NoClassDefFoundError: Could not initialize class com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter
	at com.sun.media.imageioimpl.plugins.pnm.PNMImageWriterSpi.createWriterInstance(PNMImageWriterSpi.java:117)
	at java.desktop/javax.imageio.spi.ImageWriterSpi.createWriterInstance(ImageWriterSpi.java:351)
	at java.desktop/javax.imageio.ImageIO$ImageWriterIterator.next(ImageIO.java:805)
	at java.desktop/javax.imageio.ImageIO$ImageWriterIterator.next(ImageIO.java:789)
	at java.desktop/sun.awt.X11.XDataTransferer.getPlatformMappingsForFlavor(XDataTransferer.java:413)
	at java.desktop/sun.awt.datatransfer.DesktopDatatransferServiceImpl.getPlatformMappingsForFlavor(DesktopDatatransferServiceImpl.java:87)
	at java.datatransfer/java.awt.datatransfer.SystemFlavorMap.flavorToNativeLookup(SystemFlavorMap.java:439)
	at java.datatransfer/java.awt.datatransfer.SystemFlavorMap.getNativesForFlavor(SystemFlavorMap.java:553)
	at java.desktop/sun.awt.datatransfer.DataTransferer.getFlavorsForFormats(DataTransferer.java:453)
	at java.desktop/sun.awt.datatransfer.ClipboardTransferable.<init>(ClipboardTransferable.java:88)
	at java.desktop/sun.awt.X11.XClipboard.getContents(XClipboard.java:109)
	at org.openstreetmap.josm.gui.datatransfer.ClipboardUtils.getClipboardContent(ClipboardUtils.java:107)
	at org.openstreetmap.josm.gui.datatransfer.ClipboardUtils.getClipboardContent(ClipboardUtils.java:95)
	at org.openstreetmap.josm.gui.datatransfer.ClipboardUtils.getClipboardStringContent(ClipboardUtils.java:80)
	at org.openstreetmap.josm.gui.widgets.AbstractIdTextField.tryToPasteFromClipboard(AbstractIdTextField.java:75)
	at org.openstreetmap.josm.gui.dialogs.changeset.SingleChangesetDownloadPanel.build(SingleChangesetDownloadPanel.java:64)
	at org.openstreetmap.josm.gui.dialogs.changeset.SingleChangesetDownloadPanel.<init>(SingleChangesetDownloadPanel.java:40)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.buildToolbarPanel(ChangesetCacheManager.java:143)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.build(ChangesetCacheManager.java:315)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.<init>(ChangesetCacheManager.java:333)
	at org.openstreetmap.josm.gui.dialogs.changeset.ChangesetCacheManager.getInstance(ChangesetCacheManager.java:93)
	at org.openstreetmap.josm.actions.ChangesetManagerToggleAction.actionPerformed(ChangesetManagerToggleAction.java:44)
	at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972)
	at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2314)
	at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:407)
	at java.desktop/javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:411)
	at java.desktop/javax.swing.AbstractButton.doClick(AbstractButton.java:374)
	at java.desktop/javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:982)
	at java.desktop/javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1026)
	at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:299)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6570)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3390)
	at java.desktop/java.awt.Component.processEvent(Component.java:6335)
	at java.desktop/java.awt.Container.processEvent(Container.java:2260)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4952)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2318)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4784)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4917)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4560)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4501)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2304)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2667)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4784)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:716)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:693)
	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)
Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.NoClassDefFoundError: sun/security/action/GetPropertyAction [in thread "AWT-EventQueue-0"]
	at com.sun.media.imageioimpl.plugins.pnm.PNMImageWriter.<clinit>(PNMImageWriter.java:111)
	... 51 more

[stoecker]

Closed as duplicate of #24642.