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dev build 200610231800 Sometimes when I run my project it throws the attached IllegalThreadStateException. I don't really have repro steps because this occurs randomly and no error is occurring in my application. I suspect this is a race condition because it looks like you're invoking Thread.start() when the parent ThreadGroup has already been destroyed.
Created attachment 35709 [details] stack-trace
*** This issue has been marked as a duplicate of 85686 ***