Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
This kind of error was reported before in #2926. But I believe it was taken care of. I can't think of why the Debugger issue would be related to the tooltip one. We can close this one and reopen #2926. It would be nice if there was a way to reproduce the error.
I'm seeing the tooltip error again. I haven't pinpointed it precisely, but I believe it's appearing during error checking (I was changing things quickly in code and lots of errors were appearing/disappearing.) Should I re-open?