NPE when many objects are selected and right click on the Objects panels

[pyrog]

What steps will reproduce the problem?

1. select more than one object with i.e. wikipedia keys
2. right click on the object panel

What is the expected result?

Display the contextual menu

What happens instead?

Crash

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

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URL:https://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2019-10-22 23:54:14 +0200 (Tue, 22 Oct 2019)
Build-Date:2019-10-23 01:30:56
Revision:15470
Relative:URL: ^/trunk

Identification: JOSM/1.5 (15470 fr) Mac OS X 10.14.6
OS Build number: Mac OS X 10.14.6 (18G95)
Memory Usage: 458 MB / 1820 MB (64 MB allocated, but free)
Java version: 1.8.0_221-b11, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Screen: Display 69732928 1280x800
Maximum Screen Size: 1280x800
VM arguments: [-Djava.security.policy=file:<java.home>/lib/security/javaws.policy, -DtrustProxy=true, -Djnlpx.home=<java.home>/bin, -Djava.security.manager, -Djnlpx.origFilenameArg=/Applications/josm-latest.jnlp, -Djnlpx.remove=false, -Dsun.awt.warmup=true, -Djava.util.Arrays.useLegacyMergeSort=true, -Djnlpx.heapsize=NULL,2048m, -Dmacosx.jnlpx.dock.name=JOSM (development version), -Dmacosx.jnlpx.dock.icon=${HOME}/Library/Application Support/Oracle/Java/Deployment/cache/6.0/25/4c122699-72a21903.icns, -Djnlpx.jvm="<java.home>/bin/java"]
Dataset consistency test: No problems found

Plugins:
+ CADTools (1008)
+ PicLayer (35104)
+ SeaMapEditor (34908)
+ apache-commons (35092)
+ apache-http (34908)
+ cadastre-fr (35194)
+ ejml (35122)
+ geotools (35169)
+ jaxb (35014)
+ jna (34908)
+ jts (35122)
+ opendata (35179)
+ reverter (35084)
+ tag2link (35149)
+ utilsplugin2 (35177)

Tagging presets:
+ https://josm.openstreetmap.de/josmfile?page=Presets/Towers&zip=1
+ https://raw.githubusercontent.com/OpenNauticalChart/josm/master/INT-1-preset.xml
+ https://josm.openstreetmap.de/josmfile?page=Presets/Telecom&zip=1

Validator rules:
+ https://github.com/Jungle-Bus/transport_mapcss/raw/gh-pages/transport.validator.zip

Last errors/warnings:
- E: org.openstreetmap.josm.io.OsmApiException: ResponseCode=504, Error Header=<timeout. The server is probably too busy to handle your request.>, Error Body=<<?xml version="1.0" encoding="UTF-8"?>
- E: La communication avec le serveur a échoué - ResponseCode=504, Error Header=&lt;timeout. The server is probably too busy to handle your request.&gt;, Error Body=&lt;&lt;?xml version="1.0" encoding="UTF-8"?&gt;
- E: org.openstreetmap.josm.io.OsmApiException: ResponseCode=504, Error Header=<timeout. The server is probably too busy to handle your request.>, Error Body=<<?xml version="1.0" encoding="UTF-8"?>
- E: La communication avec le serveur a échoué - ResponseCode=504, Error Header=&lt;timeout. The server is probably too busy to handle your request.&gt;, Error Body=&lt;&lt;?xml version="1.0" encoding="UTF-8"?&gt;
- E: Handled by bug report queue: java.lang.NullPointerException
- E: Handled by bug report queue: java.lang.NullPointerException
- E: Handled by bug report queue: java.lang.NullPointerException
- E: Handled by bug report queue: java.lang.NullPointerException
- E: Handled by bug report queue: java.lang.NullPointerException
- 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 (53) of javawsApplicationThreadGroup
java.lang.NullPointerException
	at java.util.TreeMap.getEntry(TreeMap.java:347)
	at java.util.TreeMap.containsKey(TreeMap.java:232)
	at java.util.TreeMap$KeySet.contains(TreeMap.java:1137)
	at org.openstreetmap.josm.data.osm.Tagged.hasTag(Tagged.java:145)
	at org.openstreetmap.josm.plugins.tag2link.listeners.PropertyPopupListener.lambda$popupMenuWillBecomeVisible$0(PropertyPopupListener.java:43)
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:174)
	at java.util.Spliterators$IteratorSpliterator.tryAdvance(Spliterators.java:1812)
	at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:126)
	at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:499)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:486)
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
	at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:152)
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.findAny(ReferencePipeline.java:469)
	at org.openstreetmap.josm.plugins.tag2link.listeners.PropertyPopupListener.popupMenuWillBecomeVisible(PropertyPopupListener.java:43)
	at javax.swing.JPopupMenu.firePopupMenuWillBecomeVisible(JPopupMenu.java:682)
	at javax.swing.JPopupMenu.setVisible(JPopupMenu.java:789)
	at javax.swing.JPopupMenu.show(JPopupMenu.java:965)
	at org.openstreetmap.josm.gui.widgets.PopupMenuLauncher.showMenu(PopupMenuLauncher.java:115)
	at org.openstreetmap.josm.gui.widgets.PopupMenuLauncher$1.focusGained(PopupMenuLauncher.java:102)
	at java.awt.AWTEventMulticaster.focusGained(AWTEventMulticaster.java:220)
	at java.awt.Component.processFocusEvent(Component.java:6428)
	at java.awt.Component.processEvent(Component.java:6295)
	at java.awt.Container.processEvent(Container.java:2239)
	at java.awt.Component.dispatchEventImpl(Component.java:4889)
	at java.awt.Container.dispatchEventImpl(Container.java:2297)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:1015)
	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:639)
	at java.awt.Component.dispatchEventImpl(Component.java:4760)
	at java.awt.Container.dispatchEventImpl(Container.java:2297)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
	at java.awt.EventQueue$4.run(EventQueue.java:733)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

[Don-vip]

regression from #14465

[Don-vip]

Bug is in core

[Don-vip]

In 15472/josm:

fix #18253 - NPE