RuntimeException when fixing one node way

[naoliv]

Validate the attached file and then click to fix the "one node ways" error. It crashes like below.

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2013-12-18 02:33:54
Last Changed Author: Don-vip
Revision: 6489
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2013-12-18 03:03:14 +0100 (Wed, 18 Dec 2013)
Last Changed Rev: 6489

Identification: JOSM/1.5 (6489 pt_BR) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 677 MB / 1756 MB (502 MB allocated, but free)
Java version: 1.7.0_45, Oracle Corporation, OpenJDK 64-Bit Server VM
Java package: openjdk-7-jre:amd64-7u45-2.4.3-2.3
VM arguments: [-Djava.net.useSystemProxies=true, -Dawt.useSystemAAFontSettings=on]
Dataset consistency test: No problems found

Plugin: AddrInterpolation (30034)
Plugin: Create_grid_of_ways (29854)
Plugin: FixAddresses (29971)
Plugin: ImageryCache (29946)
Plugin: OpeningHoursEditor (30117)
Plugin: PicLayer (29854)
Plugin: SimplifyArea (30017)
Plugin: buildings_tools (30057)
Plugin: editgpx (29854)
Plugin: geotools (29767)
Plugin: jts (29854)
Plugin: merge-overlap (30034)
Plugin: notes (v0.7)
Plugin: opendata (30097)
Plugin: pdfimport (29913)
Plugin: reverter (30031)
Plugin: tagging-preset-tester (30017)
Plugin: turnrestrictions (30110)
Plugin: undelete (29854)
Plugin: utilsplugin2 (30017)

java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
	at org.openstreetmap.josm.gui.dialogs.ValidatorDialog$FixTask.realRun(ValidatorDialog.java:645)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:82)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:150)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.reflect.InvocationTargetException
	at java.awt.EventQueue.invokeAndWait(EventQueue.java:1272)
	at java.awt.EventQueue.invokeAndWait(EventQueue.java:1247)
	at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1346)
	at org.openstreetmap.josm.gui.dialogs.ValidatorDialog$FixTask.realRun(ValidatorDialog.java:631)
	... 7 more
Caused by: java.lang.NullPointerException
	at java.lang.String$CaseInsensitiveComparator.compare(String.java:1177)
	at java.lang.String$CaseInsensitiveComparator.compare(String.java:1170)
	at java.lang.String.compareToIgnoreCase(String.java:1220)
	at org.openstreetmap.josm.data.validation.TestError.compareTo(TestError.java:298)
	at org.openstreetmap.josm.data.validation.TestError.compareTo(TestError.java:32)
	at java.util.Arrays.mergeSort(Arrays.java:573)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.mergeSort(Arrays.java:586)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.mergeSort(Arrays.java:586)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.mergeSort(Arrays.java:586)
	at java.util.Arrays.mergeSort(Arrays.java:586)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.mergeSort(Arrays.java:585)
	at java.util.Arrays.legacyMergeSort(Arrays.java:478)
	at java.util.Arrays.sort(Arrays.java:470)
	at java.util.Collections.sort(Collections.java:155)
	at org.openstreetmap.josm.gui.dialogs.validator.ValidatorTreePanel.buildTree(ValidatorTreePanel.java:136)
	at org.openstreetmap.josm.gui.dialogs.validator.ValidatorTreePanel.setErrors(ValidatorTreePanel.java:313)
	at org.openstreetmap.josm.gui.dialogs.validator.ValidatorTreePanel.resetErrors(ValidatorTreePanel.java:353)
	at org.openstreetmap.josm.gui.dialogs.ValidatorDialog$FixTask$4.run(ValidatorDialog.java:636)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:241)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
	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.awt.EventQueue.dispatchEvent(EventQueue.java:703)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:154)
	at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:182)
	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:221)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:219)
	at java.awt.Dialog.show(Dialog.java:1082)
	at java.awt.Component.show(Component.java:1651)
	at java.awt.Component.setVisible(Component.java:1603)
	at java.awt.Window.setVisible(Window.java:1014)
	at java.awt.Dialog.setVisible(Dialog.java:1005)
	at org.openstreetmap.josm.gui.progress.PleaseWaitProgressMonitor$4.run(PleaseWaitProgressMonitor.java:172)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
	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.awt.EventQueue.dispatchEvent(EventQueue.java:703)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
...<snip>...

[naoliv]

Closed as duplicate of #9442.
Why do I always find a duplicated bug only after reporting it?