id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
12870	Undo while extrude causes exception / unpredictable behaviour	malenki	team	"==== What steps will reproduce the problem?
1. Create a way with two nodes
2. Switch to extrude tool (press X)
3. Extrude from way
4. While extruding, press ctrl-z

==== What is the expected result?

Not too sure, most likely: Extruded ways disappear.
Quite sure no exception should show up. :)

==== What happens instead?

1. When releasing the left mouse button an error message pops up (about this exception).
2. When clicking the error message away and clicking somewhere in the data layer, a node remains. Obviously the ""undo"" command from before was also mapped to the just created way thus letting remain its first node.

==== Please provide any additional information below. Attach a screenshot if possible.
Tested with
blank ~/.josm
openjdk version ""1.8.0_91""
OpenJDK Runtime Environment (build 1.8.0_91-8u91-b14-2-b14)
OpenJDK 64-Bit Server VM (build 25.91-b14, mixed mode)

Reproducing this issue with polygones drawn by hand or with tools (buildings_tools, ""create circle""), it also seems that ctrl-z gets mapped to the last action before extruding.

{{{
URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2016-05-23 13:57:26 +0200 (Mon, 23 May 2016)
Build-Date:2016-05-24 01:33:07
Revision:10268
Relative:URL: ^/trunk

Identification: JOSM/1.5 (10268 de) Linux Debian GNU/Linux unstable (sid)
Memory Usage: 511 MB / 2222 MB (169 MB allocated, but free)
Java version: 1.8.0_91-8u91-b14-2-b14, Oracle Corporation, OpenJDK 64-Bit Server VM
VM arguments: [-Dsun.java2d.opengl=false]
Dataset consistency test: No problems found


Last errors/warnings:
- E: java.lang.ArrayIndexOutOfBoundsException: 2
- E: java.lang.ArrayIndexOutOfBoundsException: 2

java.lang.ArrayIndexOutOfBoundsException: 2
	at org.openstreetmap.josm.data.osm.Way.getNode(Way.java:130)
	at org.openstreetmap.josm.data.osm.WaySegment.getFirstNode(WaySegment.java:38)
	at org.openstreetmap.josm.actions.mapmode.ExtrudeAction.performExtrusion(ExtrudeAction.java:635)
	at org.openstreetmap.josm.actions.mapmode.ExtrudeAction.mouseReleased(ExtrudeAction.java:541)
	at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:290)
	at java.awt.Component.processMouseEvent(Component.java:6535)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
	at java.awt.Component.processEvent(Component.java:6300)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4891)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2280)
	at java.awt.Window.dispatchEventImpl(Window.java:2750)
	at java.awt.Component.dispatchEvent(Component.java:4713)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	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:76)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	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)
}}}
"	defect	closed	normal	17.07	Core	latest	fixed	template_report undo extrude