id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
13449	IAE: Listener PreferenceChangedListenerAdapter was not registered before or already removed	Basstoelpel	team	"==== What steps will reproduce the problem?
1. Save .joz files with local gpx layer but without data layer
2. Quit and restart josm
3. load file again

==== What is the expected result?
load the old data

==== What happens instead?
1st time after restart: ""unerwartete Ausnahme""
2nd time: works as expected

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

Erstes Öffnen eines .joz files führt zu unerwarteter Ausnahme

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-08-20 01:28:07 +0200 (Sat, 20 Aug 2016)
Build-Date:2016-08-20 01:36:08
Revision:10859
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10859 de) Windows 7 32-Bit
Memory Usage: 109 MB / 989 MB (58 MB allocated, but free)
Java version: 1.8.0_101-b13, Oracle Corporation, Java HotSpot(TM) Client VM

Plugins:
+ ColorPlugin (1414145445)
+ HouseNumberTaggingTool (32699)
+ Mapillary (32796)
+ PicLayer (32796)
+ apache-commons (32699)
+ apache-http (32699)
+ gson (32680)
+ imagery_offset_db (32796)
+ measurement (32732)
+ reverter (32796)
+ terracer (32699)
+ undelete (32699)
+ utilsplugin2 (32815)

Map paint styles:
- C:\Eigene Dateien\Styles_Power-style.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (16) of main
java.lang.IllegalArgumentException: Listener PreferenceChangedListenerAdapter [listener=org.openstreetmap.josm.gui.layer.Layer$$Lambda$106/9699713@188701d] (instance of org.openstreetmap.josm.data.preferences.AbstractProperty$PreferenceChangedListenerAdapter) was not registered before or already removed.
	at org.openstreetmap.josm.tools.ListenerList.failRemove(ListenerList.java:129)
	at org.openstreetmap.josm.tools.ListenerList.removeListener(ListenerList.java:123)
	at org.openstreetmap.josm.data.Preferences.removeKeyPreferenceChangeListener(Preferences.java:282)
	at org.openstreetmap.josm.data.preferences.AbstractProperty.removeListenerImpl(AbstractProperty.java:262)
	at org.openstreetmap.josm.data.preferences.AbstractToStringProperty$ChildProperty.removeListenerImpl(AbstractToStringProperty.java:69)
	at org.openstreetmap.josm.data.preferences.AbstractProperty.removeListener(AbstractProperty.java:258)
	at org.openstreetmap.josm.gui.layer.Layer.removeColorPropertyListener(Layer.java:230)
	at org.openstreetmap.josm.gui.layer.Layer.setName(Layer.java:313)
	at org.openstreetmap.josm.gui.layer.GpxLayer.<init>(GpxLayer.java:94)
	at org.openstreetmap.josm.io.GpxImporter.loadLayers(GpxImporter.java:144)
	at org.openstreetmap.josm.io.GpxImporter.loadLayers(GpxImporter.java:174)
	at org.openstreetmap.josm.io.session.GpxTracksSessionImporter.load(GpxTracksSessionImporter.java:51)
	at org.openstreetmap.josm.io.session.SessionReader.parseJos(SessionReader.java:490)
	at org.openstreetmap.josm.io.session.SessionReader.loadSession(SessionReader.java:631)
	at org.openstreetmap.josm.io.session.SessionReader.loadSession(SessionReader.java:587)
	at org.openstreetmap.josm.actions.SessionLoadAction$Loader.realRun(SessionLoadAction.java:163)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:93)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:141)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
}}}
"	defect	new	normal		Core			template_report regression gsoc-core session	michael2402