NullPointerException in MessageDigest.update

[kretzsch@…]

What steps will reproduce the problem?

I don't know.

What is the expected result?

Add an object to the map.

What happens instead?

JOSM was freezed for 30 sec - error message - everything normal.

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

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-03-13 01:17:21 +0100 (Sun, 13 Mar 2016)
Build-Date:2016-03-13 02:35:00
Revision:9979
Relative:URL: ^/trunk

Identification: JOSM/1.5 (9979 en) Linux Ubuntu 14.04.4 LTS
Memory Usage: 213 MB / 1748 MB (49 MB allocated, but free)
Java version: 1.8.0_72-internal-b15, Oracle Corporation, OpenJDK 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- FixAddresses (31772)
- public_transport (31895)
- public_transport_layer (32142)

Last errors/warnings:
- W: java.net.SocketTimeoutException: Read timed out
- E: java.lang.NullPointerException
- W: java.net.SocketTimeoutException: Read timed out
- E: java.lang.NullPointerException

java.lang.NullPointerException
	at java.security.MessageDigest.update(MessageDigest.java:335)
	at java.security.MessageDigest.digest(MessageDigest.java:410)
	at org.openstreetmap.gui.jmapviewer.tilesources.AbstractTMSTileSource.isNoTileAtZoom(AbstractTMSTileSource.java:196)
	at org.openstreetmap.josm.data.imagery.TMSCachedTileLoaderJob.isResponseLoadable(TMSCachedTileLoaderJob.java:134)
	at org.openstreetmap.josm.data.cache.JCSCachedTileLoaderJob.loadObject(JCSCachedTileLoaderJob.java:390)
	at org.openstreetmap.josm.data.cache.JCSCachedTileLoaderJob.run(JCSCachedTileLoaderJob.java:235)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

[Don-vip]

Closed as duplicate of #12637.