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When I try to import a class (with auto-completion or Alt-Enter) the editor hangs without any exception or indication in /var/log folder.
Created attachment 35519 [details] log when hang occurs
Created attachment 35520 [details] Thread dump for a hang
Is it reproducible (if yes, please attach exact steps to reproduce)? Do you have downloaded any addinional modules?
From thread dump, it seems to me that the hints do not cause any problems. It seems to me that the problem is caused by the usertasks module, which updates Swing data outside the AWT Event Dispatch Thread, which in turn leads into the deadlock. Reassigning to tasklist/usertasks.
fixed