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All of a sudden, I got a Netbeans exception when doing a Search for Usages (Alt-F7). So I'm reporting it, as requested. I hope I've got the correct component/subcomponent - it's not very helpful here. It seems to have gone hard - but I've not tried restarting NetBeans before reporting the issue in case the log file gets vaped.
Created attachment 32345 [details] log file as requested
Restarting Netbeans made the problem go away.
I am closing all reports in category Java/Unsupported as wontfix. These should be dead issues --- if the reported cases are against some live part of the NetBeans IDE please reopen and we can discuss to which category they belong.