Unexpected exception while uploading.

[T99]

What steps will reproduce the problem?

1. Edit thousands of nodes over a few days and upload successfully.
2. Without closing, download a small adjoining area edit a couple dozen nodes.
3. Try to upload.

What is the expected result?

Upload succeeds.

What happens instead?

Unexpected exception.

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: 2020-04-06 02:17:07 +0200 (Mon, 06 Apr 2020)
Build-Date:2020-04-06 00:18:43
Revision:16239
Relative:URL: ^/trunk

Identification: JOSM/1.5 (16239 en_GB) Windows 10 64-Bit
OS Build number: Windows 10 Home 1903 (18362)
Memory Usage: 548 MB / 989 MB (197 MB allocated, but free)
Java version: 1.8.0_161-b12, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1920x1080, \Display1 1920x1080
Maximum Screen Size: 1920x1080

Last errors/warnings:
- E: Handled by bug report queue: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
- W: Too many errors. Dropping ReportedException [thread=Thread[AWT-EventQueue-0,6,main], exception=java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location, methodWarningFrom=BugReportExceptionHandler#handleException]
- E: Handled by bug report queue: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
- W: Too many errors. Dropping ReportedException [thread=Thread[AWT-EventQueue-0,6,main], exception=java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location, methodWarningFrom=BugReportExceptionHandler#handleException]
- E: Handled by bug report queue: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
- W: Too many errors. Dropping ReportedException [thread=Thread[AWT-EventQueue-0,6,main], exception=java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location, methodWarningFrom=BugReportExceptionHandler#handleException]
- E: Handled by bug report queue: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
- W: Too many errors. Dropping ReportedException [thread=Thread[AWT-EventQueue-0,6,main], exception=java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location, methodWarningFrom=BugReportExceptionHandler#handleException]
- E: Handled by bug report queue: java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
- W: Too many errors. Dropping ReportedException [thread=Thread[AWT-EventQueue-0,6,main], exception=java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location, methodWarningFrom=BugReportExceptionHandler#handleException]


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (15) of main
java.awt.IllegalComponentStateException: component must be showing on the screen to determine its location
	at java.awt.Component.getLocationOnScreen_NoTreeLock(Unknown Source)
	at java.awt.Component.getLocationOnScreen(Unknown Source)
	at sun.awt.windows.WInputMethod$1.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(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)

[simon04]

Closed as duplicate of #15801.
Java bug, please update.