Regression - Tracer2 plugin crashes when trying to trace connected buildings

[RicoElectrico]

What steps will reproduce the problem?

1. Run Tracer2 on a building that is divided into 2 parts

What is the expected result?

The second building should be traced and its outline sticked to the first one.

What happens instead?

When tracing the second connected part, plugin will crash

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

Revision: 7925
Repository Root: http://josm.openstreetmap.de/svn
Relative URL: ^/trunk
Last Changed Author: Klumbumbus
Last Changed Date: 2015-01-04 18:11:11 +0100 (Sun, 04 Jan 2015)
Build-Date: 2015-01-05 02:33:53
URL: http://josm.openstreetmap.de/svn/trunk
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last Changed Rev: 7925

Identification: JOSM/1.5 (7925 pl) Windows 8.1 64-Bit
Memory Usage: 1156 MB / 1794 MB (547 MB allocated, but free)
Java version: 1.8.0_25, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
Dataset consistency test: No problems found

Plugins:
- FastDraw (30892)
- FixAddresses (30892)
- HouseNumberTaggingTool (30892)
- OpeningHoursEditor (30892)
- PicLayer (30892)
- ShowInGoogleMaps (8)
- SimplifyArea (30892)
- Tracer2 (30892)
- alignways (30892)
- buildings_tools (30892)
- contourmerge (1012)
- dataimport (30892)
- editgpx (30892)
- imagery_offset_db (30892)
- importvec (30892)
- kendzi3d (1.0.183)
- kendzi3d-jogl (37)
- log4j (30892)
- mapdust (30892)
- measurement (30892)
- mirrored_download (30892)
- notes (v0.9.5)
- pbf (30892)
- photo_geotagging (30892)
- poly (30892)
- reverter (30892)
- surveyor2 (29210)
- terracer (30892)
- turnrestrictions (30892)
- undelete (30892)
- utilsplugin2 (30892)
- wikipedia (30892)

Last errors/warnings:
- E: java.lang.IllegalArgumentException: Primitive to delete must be in a dataset

java.lang.IllegalArgumentException: Primitive to delete must be in a dataset
	at org.openstreetmap.josm.command.DeleteCommand.checkConsistency(DeleteCommand.java:115)
	at org.openstreetmap.josm.command.DeleteCommand.<init>(DeleteCommand.java:66)
	at org.openstreetmap.josm.command.DeleteCommand.<init>(DeleteCommand.java:76)
	at org.openstreetmap.josm.plugins.tracer2.ConnectWays.mergeNodes(ConnectWays.java:292)
	at org.openstreetmap.josm.plugins.tracer2.ConnectWays.connectTo(ConnectWays.java:251)
	at org.openstreetmap.josm.plugins.tracer2.ConnectWays.connect(ConnectWays.java:195)
	at org.openstreetmap.josm.plugins.tracer2.TracerAction.traceSync(TracerAction.java:330)
	at org.openstreetmap.josm.plugins.tracer2.TracerAction.access$000(TracerAction.java:62)
	at org.openstreetmap.josm.plugins.tracer2.TracerAction$1.realRun(TracerAction.java:174)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:93)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:161)
	at java.lang.Thread.run(Unknown Source)

[RicoElectrico]

Tracer2 log and settings

[Klumbumbus]

Closed as duplicate of #10834.