IAE: Node is already deleted (ContourMergeMode)

[Jrachi]

What steps will reproduce the problem?

1. Working very heavily and casually with contourmerge

What is the expected result?

Moving and matching of ways

What happens instead?

One of the lines involved in the merger "loses" one or more nodes that no longer appear.
Conflicts occur at the next upload, sometimes so branched that you decide to lose your job before continuing.

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

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-01-02 22:34:59 +0100 (Thu, 02 Jan 2020)
Revision:15628
Build-Date:2020-01-02 21:52:31
URL:https://josm.openstreetmap.de/svn/trunk

Identification: JOSM/1.5 (15628 it) Linux Ubuntu 19.10
Memory Usage: 1316 MB / 3988 MB (263 MB allocated, but free)
Java version: 11.0.5+10-post-Ubuntu-0ubuntu1.1, Private Build, OpenJDK 64-Bit Server VM
Screen: :0.0 1920x1080
Maximum Screen Size: 1920x1080
Java package: openjdk-11-jre:amd64-11.0.5+10-0ubuntu1.1
Java ATK Wrapper package: libatk-wrapper-java:all-0.35.0-3
fonts-noto: fonts-noto:-
VM arguments: [-Djosm.restart=true, -Djava.net.useSystemProxies=true]
Dataset consistency test: No problems found

Plugins:
+ FastDraw (35256)
+ Mapillary (1.5.20)
+ OpeningHoursEditor (35250)
+ apache-commons (35092)
+ apache-http (35092)
+ auto_tools (73)
+ buildings_tools (35248)
+ continuosDownload (82)
+ contourmerge (v0.1.5)
+ jna (35092)
+ tag2link (35248)
+ todo (30306)
+ utilsplugin2 (35248)

Tagging presets:
+ https://raw.githubusercontent.com/osmItalia/cai_josm_preset/master/cai.xml
+ https://josm.openstreetmap.de/josmfile?page=Presets/Industrial&zip=1
+ https://josm.openstreetmap.de/josmfile?page=Presets/Mountains&zip=1

Map paint styles:
+ https://josm.openstreetmap.de/josmfile?page=Styles/Landcover&zip=1
+ ${HOME}/Scaricati/JOSM-MapCSS-styles-master.zip

Last errors/warnings:
- W: Already here java.net.SocketTimeoutException: Read timed out
- W: java.net.SocketTimeoutException: Read timed out
- W: Already here java.net.SocketTimeoutException: Read timed out
- W: java.net.SocketTimeoutException: Read timed out
- W: Already here java.net.SocketTimeoutException: Read timed out
- W: java.net.SocketTimeoutException: Read timed out
- W: Already here java.net.SocketTimeoutException: Read timed out
- W: JOSM si attendeva di trovare la primitiva [percorso -850068] nell'insieme di dati, ma non c'è. Si prega di riportarlo a https://josm.openstreetmap.de. Questo non è un errore critico e dovrebbe essere possibile continuare senza problemi il proprio lavoro.
- E: java.lang.Exception
- E: Handled by bug report queue: java.lang.IllegalArgumentException: {Node id=2185153919 version=1 MVD lat=45.2221301,lon=7.322098} is already deleted


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

Warning issued by: BugReportExceptionHandler#handleException

=== STACK TRACE ===
Thread: AWT-EventQueue-0 (19) of main
java.lang.IllegalArgumentException: {Node id=2185153919 version=1 MVD lat=45.2221301,lon=7.322098} is already deleted
	at org.openstreetmap.josm.command.DeleteCommand.executeCommand(DeleteCommand.java:191)
	at org.openstreetmap.josm.command.SequenceCommand.executeCommand(SequenceCommand.java:79)
	at org.openstreetmap.josm.data.UndoRedoHandler.addNoRedraw(UndoRedoHandler.java:300)
	at org.openstreetmap.josm.data.UndoRedoHandler.add(UndoRedoHandler.java:354)
	at org.openstreetmap.josm.plugins.contourmerge.ContourMergeMode.lambda$onDrop$9(ContourMergeMode.java:286)
	at java.base/java.util.Optional.ifPresent(Optional.java:183)
	at org.openstreetmap.josm.plugins.contourmerge.ContourMergeMode.onDrop(ContourMergeMode.java:277)
	at org.openstreetmap.josm.plugins.contourmerge.ContourMergeMode.mouseReleased(ContourMergeMode.java:114)
	at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:298)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6632)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3342)
	at java.desktop/java.awt.Component.processEvent(Component.java:6397)
	at java.desktop/java.awt.Container.processEvent(Container.java:2263)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5008)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2321)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4918)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4547)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4488)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2307)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2772)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4840)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:772)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:95)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:745)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:743)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[Don-vip]

Ticket #18732 has been marked as a duplicate of this ticket.

[skyper]

Might be a duplicate of #20629 and fixed.

[taylor.smock]

Ticket #18655 has been marked as a duplicate of this ticket.

[taylor.smock]

Closed as duplicate of #20629.
The root cause was probably fixed in #20629. I'm going to go ahead and close this now.