JOSM Frozen and displaying a report bug screen upon opening laptop from sleep overnight

[anonymous]

What steps will reproduce the problem?

Unsure – these are the last things I did before re-opening my laptop:

1. Left computer as was, with JOSM open
2. Put computer to sleep
3. Opened computer ~12 hours later

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

Revision:19555
Build-Date:2026-03-30 09:44:38

Identification: JOSM/1.5 (19555 en) Mac OS X 26.5.2
OS Build number: macOS 26.5.2 (25F84)
Memory Usage: 1264 MB / 18432 MB (641 MB allocated, but free)
Java version: 21.0.10+7-LTS, Azul Systems, Inc., OpenJDK 64-Bit Server VM
Look and Feel: javax.swing.plaf.metal.MetalLookAndFeel
Screen: Display 3 2560x1440x32bpp@75Hz (scaling 1.00×1.00)
Maximum Screen Size: 2560×1440
Best cursor sizes: 16×16→16×16, 32×32→32×32
System property file.encoding: UTF-8
System property sun.jnu.encoding: UTF-8
Locale info: en_NZ
Numbers with default locale: 1234567890 -> 1234567890
VM arguments: [-Djpackage.app-version=19555, -XX:MaxRAMPercentage=75.0, --add-modules=java.scripting,java.sql,javafx.controls,javafx.media,javafx.swing,javafx.web, --add-exports=java.base/sun.security.action=ALL-UNNAMED, --add-exports=java.desktop/com.apple.eawt=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.plugins.jpeg=ALL-UNNAMED, --add-exports=java.desktop/com.sun.imageio.spi=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, -Djpackage.app-path=/Applications/JOSM.app/Contents/MacOS/JOSM]
Dataset consistency test: No problems found

Plugins:
+ ColorPlugin (46)
+ PicLayer (273)
+ buildings_tools (36474)
+ indoorhelper (266)
+ utilsplugin2 (36497)

Map paint styles:
+ <josm.userdata>/plugins/indoorhelper/resources/sit.mapcss

Last errors/warnings:
- 00004.136 W: Update plugins - Last plugin update more than 34 days ago.
- 00019.116 E: Failed to locate image 'https://ecan.govt.nz/favicon.ico'
- 00020.179 E: Failed to locate image 'https://koordinates.a.ssl.fastly.net/media/settings/branding/favicon-lds.ico'
- 00020.429 E: Failed to locate image 'https://koordinates.a.ssl.fastly.net/media/settings/branding/favicon-lds.ico'
- 00450.368 E: Failed to locate image 'https://koordinates.a.ssl.fastly.net/media/settings/branding/favicon-lds.ico'
- 40917.893 E: Handled by bug report queue: java.lang.ClassCastException: class sun.java2d.opengl.CGLGraphicsConfig cannot be cast to class sun.java2d.metal.MTLGraphicsConfig (sun.java2d.opengl.CGLGraphicsConfig and sun.java2d.metal.MTLGraphicsConfig are in module java.desktop of loader 'bootstrap')
- 40917.896 E: Handled by bug report queue: java.lang.ClassCastException: class sun.java2d.opengl.CGLGraphicsConfig cannot be cast to class sun.java2d.metal.MTLGraphicsConfig (sun.java2d.opengl.CGLGraphicsConfig and sun.java2d.metal.MTLGraphicsConfig are in module java.desktop of loader 'bootstrap')



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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (42) of main
java.lang.ClassCastException: class sun.java2d.opengl.CGLGraphicsConfig cannot be cast to class sun.java2d.metal.MTLGraphicsConfig (sun.java2d.opengl.CGLGraphicsConfig and sun.java2d.metal.MTLGraphicsConfig are in module java.desktop of loader 'bootstrap')
	at java.desktop@21.0.10/sun.java2d.metal.MTLVolatileSurfaceManager.initAcceleratedSurface(Unknown Source)
	at java.desktop@21.0.10/sun.awt.image.VolatileSurfaceManager.initialize(Unknown Source)
	at java.desktop@21.0.10/sun.awt.image.SunVolatileImage.<init>(Unknown Source)
	at java.desktop@21.0.10/sun.awt.image.SunVolatileImage.<init>(Unknown Source)
	at java.desktop@21.0.10/java.awt.GraphicsConfiguration.createCompatibleVolatileImage(Unknown Source)
	at java.desktop@21.0.10/java.awt.GraphicsConfiguration.createCompatibleVolatileImage(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager.getVolatileOffscreenBuffer(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager$PaintManager.paint(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager.paint(Unknown Source)
	at java.desktop@21.0.10/javax.swing.JComponent.paint(Unknown Source)
	at java.desktop@21.0.10/java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)
	at java.desktop@21.0.10/sun.awt.SunGraphicsCallback.runOneComponent(Unknown Source)
	at java.desktop@21.0.10/sun.awt.SunGraphicsCallback.runComponents(Unknown Source)
	at java.desktop@21.0.10/java.awt.Container.paint(Unknown Source)
	at java.desktop@21.0.10/java.awt.Window.paint(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager$4.run(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager$4.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager.paintDirtyRegions(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager.prePaintDirtyRegions(Unknown Source)
	at java.desktop@21.0.10/javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
	at java.desktop@21.0.10/java.awt.event.InvocationEvent.dispatch(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventQueue$4.run(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventQueue$4.run(Unknown Source)
	at java.base/java.security.AccessController.doPrivileged(Unknown Source)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.desktop@21.0.10/java.awt.EventDispatchThread.run(Unknown Source)

[stoecker]

That's a bug in Java itself. Maybe another Java release doesn't have it anymore. Nothing JOSM can do.