IllegalStateException: cannot open system clipboard

[Klumbumbus]

I copied something in firefox while JOSM (10634 from Jenkins) was in background
(If relevant, Windows was in hibernate while JOSM was open)

Build-Date:2016-07-25 09:57:08
Revision:10634
Is-Local-Build:true

Identification: JOSM/1.5 (10634 SVN de) Windows 7 32-Bit
Memory Usage: 213 MB / 247 MB (118 MB allocated, but free)
Java version: 1.8.0_101-b13, Oracle Corporation, Java HotSpot(TM) Client VM
Dataset consistency test: No problems found

Plugins:
- AddrInterpolation (32584)
- DirectDownload (32442)
- DirectUpload (32329)
- HouseNumberTaggingTool (32584)
- Mapillary (32639)
- OpeningHoursEditor (32583)
- Tracer2 (32474)
- apache-commons (32584)
- apache-http (32584)
- buildings_tools (32639)
- editgpx (32485)
- imagery_offset_db (32528)
- log4j (32309)
- measurement (32454)
- photo_geotagging (32392)
- photoadjust (32584)
- pt_assistant (32710)
- reverter (32584)
- tag2link (32326)
- tagging-preset-tester (32584)
- terracer (32426)
- todo (29154)
- turnlanes-tagging (1468266519)
- turnrestrictions (32629)
- undelete (32584)
- utilsplugin2 (32584)
- wikipedia (32671)

Tagging presets:
- D:\<user.name>\OSM\JOSMSVN\data\defaultpresets.xml
- D:\<user.name>\OSM\TestNew\newpresets.xml
- http://zibi.openstreetmap.org.pl/kendzi/k/Simple3dPreset/s3db-preset.zip
- https://josm.openstreetmap.de/josmfile?page=Presets/AdvertisingPreset&zip=1
- https://josm.openstreetmap.de/josmfile?page=Presets/NewTags&zip=1
- https://josm.openstreetmap.de/josmfile?page=Presets/OneClick&zip=1
- https://josm.openstreetmap.de/josmfile?page=Presets/StolpersteineLight&zip=1

Map paint styles:
- D:\<user.name>\OSM\JOSMSVN\styles\standard\elemstyles.mapcss
- D:\<user.name>\OSM\TestNew\newicons.mapcss
- D:\<user.name>\OSM\eigene styles\PriorityRoad\PriorityRoad_1.0.mapcss
- D:\<user.name>\OSM\eigene styles\SpecificBuildingValues\SpecificBuildingValues.mapcss
- D:\<user.name>\OSM\eigene styles\Tourenplanung.mapcss
- D:\<user.name>\OSM\eigene styles\area-symbol.zip
- D:\<user.name>\OSM\patches\old MPs\dataquality.mapcss
- http://www.freietonne.de/ft_icons/josm/FreieTonne_rules_presets_zip.php
- http://www.openrailwaymap.org/styles/standard.mapcss
- https://github.com/bastik/mapcss-tools/raw/osm/mapnik2mapcss/osm-results/mapnik.zip
- https://josm.openstreetmap.de/josmfile?page=Styles/AdvertisingStyle&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_Streets&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Coloured_buildings&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Cycleways&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/DestinationSignRelation&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/HiDPISupport&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Incline&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lane_and_Road_Attributes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LayerChecker&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Lit&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/LitObjects&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Maxspeed&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/MaxspeedIcons&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Modified&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/NewHighwayColors&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Osmc&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/PTStops&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ParkingLanes&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/ShowID&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Sidewalks&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/Surface&style&zip=1
- https://josm.openstreetmap.de/josmfile?page=Styles/sac_scale&zip=1
- https://raw.githubusercontent.com/species/josm-preset-wheelchair/master/sidewalks_kerbs.mapcss

Validator rules:
- D:\<user.name>\OSM\TestNew\new.validator.mapcss
- https://raw.githubusercontent.com/stefan-a-bauer/josm-validators/master/mtb.validator.mapcss

Last errors/warnings:
- W: org.openstreetmap.josm.io.OsmTransferException: Verbindung zum OSM-Server fehlgeschlagen. Bitte überprüfen Sie Ihre Internetverbindung.. Ursache: java.net.UnknownHostException: api.openstreetmap.org
- W: java.net.UnknownHostException: api.openstreetmap.org
- W: Already here java.net.UnknownHostException: api.openstreetmap.org
- E: java.net.UnknownHostException: api.openstreetmap.org
- W: org.openstreetmap.josm.io.OsmTransferException: Verbindung zum OSM-Server fehlgeschlagen. Bitte überprüfen Sie Ihre Internetverbindung.. Ursache: java.net.UnknownHostException: api.openstreetmap.org
- W: java.net.UnknownHostException: api.openstreetmap.org
- W: Already here java.net.UnknownHostException: api.openstreetmap.org
- E: java.net.UnknownHostException: api.openstreetmap.org
- W: org.openstreetmap.josm.io.OsmTransferException: Verbindung zum OSM-Server fehlgeschlagen. Bitte überprüfen Sie Ihre Internetverbindung.. Ursache: java.net.UnknownHostException: api.openstreetmap.org
- E: java.lang.IllegalStateException: cannot open system clipboard

java.lang.IllegalStateException: cannot open system clipboard
	at sun.awt.windows.WClipboard.openClipboard(Native Method)
	at sun.awt.datatransfer.SunClipboard.getClipboardFormatsOpenClose(Unknown Source)
	at sun.awt.datatransfer.SunClipboard.getAvailableDataFlavors(Unknown Source)
	at org.openstreetmap.josm.gui.datatransfer.OsmTransferHandler.isDataAvailable(OsmTransferHandler.java:114)
	at org.openstreetmap.josm.actions.PasteAction.updateEnabledState(PasteAction.java:64)
	at org.openstreetmap.josm.actions.PasteAction.flavorsChanged(PasteAction.java:69)
	at sun.awt.datatransfer.SunClipboard$1SunFlavorChangeNotifier.run(Unknown Source)
	at java.awt.event.InvocationEvent.dispatch(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.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)

[Klumbumbus]

(just happend also in r10619)

[Don-vip]

In 10639/josm:

fix #13207 - IllegalStateException: cannot open system clipboard