NPE at utilsplugin2.selection.UndoSelectionAction.actionPerformed

[Klumbumbus]

What steps will reproduce the problem?

1. create a new layer
2. delete the layer
3. click on one of the four items in the selection menu, which are not disabled (greyed out), see screenshot

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-05-07 22:27:04 +0200 (Sun, 07 May 2017)
Build-Date:2017-05-08 01:32:42
Revision:12086
Relative:URL: ^/trunk

Identification: JOSM/1.5 (12086 de) Windows 10 64-Bit
Memory Usage: 1815 MB / 3641 MB (1601 MB allocated, but free)
Java version: 1.8.0_131-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: \Display0 1680x1050
Maximum Screen Size: 1680x1050
VM arguments: [-Djava.security.manager, -Djava.security.policy=file:<java.home>\lib\security\javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>\bin, -Djnlpx.origFilenameArg=C:\Program Files (x86)\josm-latest-mehr-RAM.jnlp, -Djnlpx.remove=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=1024m,4096m, -Djnlpx.splashport=60958, -Djnlpx.jvm=<java.home>\bin\javaw.exe]

Plugins:
+ AddrInterpolation (33160)
+ DirectDownload (33160)
+ DirectUpload (33182)
+ FastDraw (33182)
+ HouseNumberTaggingTool (33160)
+ Mapillary (v1.5.3)
+ OpeningHoursEditor (33185)
+ Tracer2 (33004)
+ alignways (33182)
+ apache-commons (32994)
+ apache-http (32699)
+ buildings_tools (33004)
+ contourmerge (1030)
+ editgpx (33004)
+ imagery-xml-bounds (33276)
+ imagery_offset_db (33004)
+ jogl (1.0.46)
+ log4j (32699)
+ measurement (33088)
+ osm-obj-info (1484152384)
+ photo_geotagging (33088)
+ photoadjust (33088)
+ reltoolbox (33265)
+ reverter (33088)
+ tag2link (33035)
+ tageditor (33021)
+ tagging-preset-tester (33004)
+ terracer (33088)
+ turnlanes-tagging (254)
+ turnrestrictions (33088)
+ undelete (33263)
+ utilsplugin2 (33212)
+ wikipedia (33288)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/StolpersteineLight&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/NewTags&zip=1
+ %UserProfile%\Documents\OSM\JOSMSVN\data\defaultpresets.xml
+ https://raw.githubusercontent.com/yopaseopor/traffic_signs_preset_JOSM/master/DE.zip
+ https://josm.openstreetmap.de/josmfile?page=Presets/Industrial&zip=1
+ http://somewhere.dk/email/josm/source.xml

Map paint styles:
- %UserProfile%\Documents\OSM\JOSMSVN\styles\standard\elemstyles.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/HiDPISupport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- %UserProfile%\Documents\OSM\eigene styles\maxspeed\maxspeed_2.8_01 zeige richtungspfeile.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/sac_scale&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ShowID&zip=1
- %UserProfile%\Documents\OSM\eigene styles\PriorityRoad\PriorityRoad_1.0.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/LayerChecker&zip=1
- %UserProfile%\Documents\OSM\eigene styles\layer checker\layer checker_1.2.mapcss
+ %UserProfile%\Documents\OSM\TestNew\newicons.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Surface&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&style&zip=1
- %UserProfile%\Documents\OSM\patches\old MPs\dataquality.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Sidewalks&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Cycleways&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Osmc&style&zip=1
- https://raw.githubusercontent.com/species/josm-preset-wheelchair/master/sidewalks_kerbs.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/LitObjects&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lit&style&zip=1
- %UserProfile%\Documents\OSM\eigene styles\Tourenplanung.mapcss
- %UserProfile%\Documents\OSM\eigene styles\SpecificBuildingValues\SpecificBuildingValues.mapcss
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_buildings&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Modified&zip=1
- https://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip
- %UserProfile%\Documents\OSM\eigene styles\area-symbol.zip
- http://www.freietonne.de/ft_icons/josm/FreieTonne_rules_presets_zip.php
- https://josm.openstreetmap.de/josmfile?page=Styles/NewHighwayColors&zip=1
- http://www.openrailwaymap.org/styles/standard.zip
- https://josm.openstreetmap.de/josmfile?page=Styles/MaxspeedIcons&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/DestinationSignRelation&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/Incline&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PTStops&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/AdvertisingStyle&zip=1
- https://www.dropbox.com/s/qo3ai47fpv241jf/Styles_Fixme_and_Notes.zip?raw=1
- https://github.com/gmgeo/osmic-josm-style/archive/master.zip
- https://josm.openstreetmap.de/josmfile?page=Styles/hazmat&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Suburb&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Postcode&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Styles/RecyclingMaterials&zip=1

Validator rules:
+ https://raw.githubusercontent.com/<user.name>n-a-bauer/josm-validators/master/mtb.validator.mapcss
+ %UserProfile%\Documents\OSM\TestNew\new.validator.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Rules/GermanySpecific&zip=1
- %UserProfile%\Documents\OSM\TestNew\germ.validator.mapcss
+ https://josm.openstreetmap.de/josmfile?page=Rules/CzechRepublicAddressSystem&zip=1

Last errors/warnings:
- W: extended font config - overriding 'allfonts.symbol=Symbol' with 'Segoe UI Symbol'
- E: java.io.IOException: Die angeforderte URL http://osmlab.github.io/editor-layer-index/imagery.xmlx wurde nicht gefunden
- E: Handled by bug report queue: java.lang.NullPointerException


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-2 (48) of javawsApplicationThreadGroup
java.lang.NullPointerException
	at org.openstreetmap.josm.plugins.utilsplugin2.selection.UndoSelectionAction.actionPerformed(UndoSelectionAction.java:38)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
	at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
	at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
	at javax.swing.AbstractButton.doClick(Unknown Source)
	at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
	at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
	at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(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)

[Don-vip]

Fixed in [o33297:33298].