Got this:
!MESSAGE BadLocationException
...
org.eclipse.jface.text.BadLocationException
at org.eclipse.jface.text.ListLineTracker.getLineOffset(ListLineTracker.java:212)
...
Now I will think very badly of the dev.
It is followed by 20 seconds of idling (or whatever).
It would cost me a few milliseconds to know where the problem is if the error message would tell ***WHICH LOCATION IS BAD***.
Please follow https://miamao.de/blog/2024-02/12.Good_Log_Messages.html