Exception when using F1 (Go to OSM wiki) on a relation without "type" key

[markus.heidelberg@…]

What steps will reproduce the problem?

1. Download data from ​https://www.openstreetmap.org/#map=19/37.60103/24.73649
2. Select the building (way 256000601)
3. Click on relation 3868761 in the Tags/Memberships panel
4. Press F1 or right-click "Go to OSM wiki ..."

This can also be reproduced with the coastline next to it after removing the "type" key from that relation.

What is the expected result?

Wiki opened in browser.

What happens instead?

"Unexpected Exception" message.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2014-07-28 22:35:35
Last Changed Author: Don-vip
Revision: 7347
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2014-07-29 00:32:15 +0200 (Tue, 29 Jul 2014)
Last Changed Rev: 7347

Identification: JOSM/1.5 (7347 de) Linux Arch Linux
Memory Usage: 446 MB / 880 MB (177 MB allocated, but free)
Java version: 1.7.0_65, Oracle Corporation, OpenJDK 64-Bit Server VM
VM arguments: [-Djosm.restart=true]
Dataset consistency test: No problems found

Plugin: FixAddresses (30416)
Plugin: RoadSigns (30495)
Plugin: buildings_tools (30485)
Plugin: mapdust (30502)
Plugin: notes (v0.9.3)
Plugin: reverter (30521)

java.lang.NullPointerException
	at java.net.URLEncoder.encode(URLEncoder.java:205)
	at org.openstreetmap.josm.gui.dialogs.properties.PropertiesDialog$HelpAction.actionPerformed(PropertiesDialog.java:1080)
	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1662)
	at javax.swing.JComponent.processKeyBinding(JComponent.java:2869)
	at javax.swing.JComponent.processKeyBindings(JComponent.java:2930)
	at javax.swing.JComponent.processKeyEvent(JComponent.java:2832)
	at java.awt.Component.processEvent(Component.java:6293)
	at java.awt.Container.processEvent(Container.java:2229)
	at java.awt.Component.dispatchEventImpl(Component.java:4872)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Component.dispatchEvent(Component.java:4698)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1887)
	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:762)
	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1027)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:899)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:727)
	at java.awt.Component.dispatchEventImpl(Component.java:4742)
	at java.awt.Container.dispatchEventImpl(Container.java:2287)
	at java.awt.Window.dispatchEventImpl(Window.java:2719)
	at java.awt.Component.dispatchEvent(Component.java:4698)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
	at java.awt.EventQueue.access$200(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:694)
	at java.awt.EventQueue$3.run(EventQueue.java:692)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.awt.EventQueue$4.run(EventQueue.java:708)
	at java.awt.EventQueue$4.run(EventQueue.java:706)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

[Don-vip]

In 7368/josm:

fix #10348 - NPE when using F1 (Go to OSM wiki) on a relation without type key