AlignWays plugin causes crashes/unexpected errors

[skquinn]

What steps will reproduce the problem?

1. Correct alignment of a way using AlignWays plugin
2. Note that after switching away from AlignWays plugin, green and yellow segments from plugin remain.
3. Try to do something with the segments (delete, combine).

What is the expected result?

No error message.

What happens instead?

"An unexpected error occurred" etc. This has been happening for at least the two most recent stable versions.

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

Repository Root: http://josm.openstreetmap.de/svn
Build-Date: 2015-10-30 02:32:24
Last Changed Author: Don-vip
Revision: 8969
Repository UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Relative URL: ^/trunk
URL: http://josm.openstreetmap.de/svn/trunk
Last Changed Date: 2015-10-29 22:15:23 +0100 (Thu, 29 Oct 2015)
Last Changed Rev: 8969

Identification: JOSM/1.5 (8969 en) Linux Ubuntu 14.04.3 LTS
Memory Usage: 285 MB / 876 MB (92 MB allocated, but free)
Java version: 1.7.0_76, Oracle Corporation, Java HotSpot(TM) 64-Bit Server VM
VM arguments: [-Djosm.restart=true, -Djava.net.useSystemProxies=true, -Djosm.home=/home/skquinn/.josm-ogf]
Program arguments: [ar901_20151103T1728.osm]

Dataset consistency test:
[WARN - NO NODES] Way {Way id=1374163 version=1 V nodes=[{Node id=16586235 version=1 V lat=-8.7070409,lon=170.0267767}]} has only one node


Plugins:
- AddrInterpolation (31694)
- BuildingGeneralization (UNKNOWN)
- ColorPlugin (1414145445)
- Create_grid_of_ways (31603)
- DirectDownload (31603)
- DirectUpload (31694)
- FixAddresses (31694)
- HouseNumberTaggingTool (31603)
- OpeningHoursEditor (31696)
- RoadSigns (31694)
- alignways (31694)
- areaselector (263)
- buildings_tools (31694)
- contourmerge (1013)
- download_along (31603)
- ext_tools (31603)
- fieldpapers (v0.4.0)
- graphview (31694)
- log4j (31603)
- measurement (31694)
- michigan_left (31603)
- poly (31694)
- reltoolbox (31694)
- reverter (31694)
- terracer (31694)
- turnlanes (31603)
- turnrestrictions (31694)
- undelete (31603)
- utilsplugin2 (31694)
- walkingpapers (31603)
- waydownloader (31603)
- waypoint_search (31603)
- wikipedia (31694)

Last errors/warnings:
- E: java.lang.ArrayIndexOutOfBoundsException: 0

java.lang.ArrayIndexOutOfBoundsException: 0
	at org.openstreetmap.josm.data.osm.Way.getNode(Way.java:134)
	at com.tilusnet.josm.plugins.alignways.AlignWaysSegment.drawSegment(AlignWaysSegment.java:101)
	at com.tilusnet.josm.plugins.alignways.AlignWaysSegment.highlightSegment(AlignWaysSegment.java:96)
	at com.tilusnet.josm.plugins.alignways.AlignWaysSegment.paint(AlignWaysSegment.java:88)
	at com.tilusnet.josm.plugins.alignways.AlignWaysAlgnSegment.paint(AlignWaysAlgnSegment.java:224)
	at org.openstreetmap.josm.gui.MapView.paint(MapView.java:726)
	at javax.swing.JComponent.paintChildren(JComponent.java:888)
	at javax.swing.JComponent.paint(JComponent.java:1064)
	at javax.swing.JComponent.paintToOffscreen(JComponent.java:5232)
	at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:295)
	at javax.swing.RepaintManager.paint(RepaintManager.java:1249)
	at javax.swing.JComponent._paintImmediately(JComponent.java:5180)
	at javax.swing.JComponent.paintImmediately(JComponent.java:4991)
	at javax.swing.RepaintManager$3.run(RepaintManager.java:808)
	at javax.swing.RepaintManager$3.run(RepaintManager.java:796)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:796)
	at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:769)
	at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:718)
	at javax.swing.RepaintManager.access$1100(RepaintManager.java:62)
	at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1677)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:312)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:738)
	at java.awt.EventQueue.access$300(EventQueue.java:103)
	at java.awt.EventQueue$3.run(EventQueue.java:699)
	at java.awt.EventQueue$3.run(EventQueue.java:697)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:708)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

[anonymous]

Same error over here, occuring since the last two stable versions -- System identification: JOSM/1.5 (8969 en) Windows 10

[Don-vip]

Fixed in [o32160:32162]. For point 2, see #12132