Reporter: openstreetmap[at]riscott.ukfsn.org
[Submitted to the original trac issue database at 7.09am, Thursday, 13th April 2006]

Here's a fun one:

If you make a slight mistake when selecting the segments, deselect the segment then later reselect it, it thinks you're concurrently modifying things... ...with yourself.

The applet then becomes unresponsive with:

java.util.ConcurrentModificationException
	at java.util.AbstractList$Itr.checkForComodification(Unknown Source)
	at java.util.AbstractList$Itr.next(Unknown Source)
	at org.openstreetmap.processing.OsmApplet.draw(OsmApplet.java:493)
	at processing.core.PApplet.display(PApplet.java:1183)
	at processing.core.PGraphics.requestDisplay(PGraphics.java:520)
	at processing.core.PApplet.run(PApplet.java:1009)
	at java.lang.Thread.run(Unknown Source)

Quite annoying if you've just selected ten screens worth of segments for a long way and you have to start again.