An object with two warnings from the validator is able to be deleted twice, making JOSM crash

[D4RKL3G10N]

JOSM reports bug after attempting to delete a way that had been deleted before.

What steps will reproduce the problem?

1. Do a validation check.
2. Find a warning that indicates overlapping ways. That very same way must have another warning at the same time indicated by the validator.
3. Delete the way by selecting it from the first warning of the validator.
4. Go to the second warning, select it again, and attempt to delete it. You will notice when selecting the way that it has zero nodes.

P.S.: Use the dataset to find a way with 2 warnings on it, as explained above. I assume any kind of two warnings can cause the same bug, mustn't be specifically overlapping ways.

What is the expected result?

The way to be deleted, or at least, when it's deleted for the first time, that the second warning disappears.

What happens instead?

JOSM gives a bug warning and requests that a ticket be submitted. It doesn't crash, but isn't able to solve the problem.

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

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2011-08-01 01:31:34
Last Changed Author: stoecker
Revision: 4279
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2011-07-31 23:52:49 +0200 (Sun, 31 Jul 2011)
Last Changed Rev: 4279

Identification: JOSM/1.5 (4279 en)
Memory Usage: 46 MB / 494 MB (24 MB allocated, but free)
Java version: 1.6.0_26, Sun Microsystems Inc., Java HotSpot(TM) Client VM
Operating system: Windows 7
Dataset consistency test: No problems found

Plugin: OpeningHoursEditor (26530)
Plugin: buildings_tools (26530)
Plugin: openstreetbugs (26530)
Plugin: terracer (26406)
Plugin: turnrestrictions (26530)

java.lang.IllegalArgumentException: {Way id=88608120 version=1 MVDT> nodes=[]} is already deleted
	at org.openstreetmap.josm.command.DeleteCommand.executeCommand(DeleteCommand.java:117)
	at org.openstreetmap.josm.command.SequenceCommand.executeCommand(SequenceCommand.java:53)
	at org.openstreetmap.josm.data.UndoRedoHandler.addNoRedraw(UndoRedoHandler.java:36)
	at org.openstreetmap.josm.data.UndoRedoHandler.add(UndoRedoHandler.java:58)
	at org.openstreetmap.josm.actions.mapmode.DeleteAction.doActionPerformed(DeleteAction.java:142)
	at org.openstreetmap.josm.actions.DeleteAction.actionPerformed(DeleteAction.java:28)
	at javax.swing.SwingUtilities.notifyAction(Unknown Source)
	at javax.swing.JComponent.processKeyBinding(Unknown Source)
	at javax.swing.KeyboardManager.fireBinding(Unknown Source)
	at javax.swing

[D4RKL3G10N]

Dataset containing a way that will have 2 warnings on it