IAE: "Value must not be null" at JCSCachedTileLoaderJob.loadObject

[matthewgfrazer@…]

What steps will reproduce the problem?

1. Exploring imagery options

What is the expected result?

What happens instead?

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: 2019-02-02 21:01:18 +0100 (Sat, 02 Feb 2019)
Build-Date:2019-02-04 21:50:11
Revision:14760
Relative:URL: ^/trunk

Identification: JOSM/1.5 (14760 en) Windows 10 64-Bit
OS Build number: Windows 10 Enterprise 1803 (17134)
Memory Usage: 390 MB / 989 MB (121 MB allocated, but free)
Java version: 1.8.0_201-b09, Oracle Corporation, Java HotSpot(TM) Client VM
Screen: \Display0 1920x1080
Maximum Screen Size: 1920x1080

Plugins:
+ imagery_offset_db (34867)
+ turnrestrictions (34867)

Last errors/warnings:
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- W: java.io.IOException: Attribution is not loaded yet
- E: Handled by bug report queue: org.apache.commons.jcs.access.exception.InvalidArgumentException: Value must not be null
- E: Handled by bug report queue: org.apache.commons.jcs.access.exception.InvalidArgumentException: Value must not be null


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: TMS-downloader-24 (73)
org.apache.commons.jcs.access.exception.InvalidArgumentException: Value must not be null
	at org.apache.commons.jcs.access.CacheAccess.put(CacheAccess.java:256)
	at org.openstreetmap.josm.data.cache.JCSCachedTileLoaderJob.loadObject(JCSCachedTileLoaderJob.java:330)
	at org.openstreetmap.josm.data.cache.JCSCachedTileLoaderJob.run(JCSCachedTileLoaderJob.java:231)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)