This Bugzilla instance is a read-only archive of historic NetBeans bug reports. To report a bug in NetBeans please follow the project's instructions for reporting issues.
build 20070815 Open SVG File swicth to source, make some change, undo the changes, press arrow last edith several times, press View Button . the follow exception appear if you repeat the steps you will get a deadlock. =)
Created attachment 46750 [details] Exception
I cannot reproduce this issue. Anyway I have changed particular code to print a warning message instead of showing AssertionError. Also I cannot reproduce the deadlock. Please, attach a full-thread-dump to be able to trace the problem. Resolving as "WorksForMe".