Possibly the total number of characters in the Log and size of Log window area?
Here is the sequence:
1. To check for a bug in my logic, I logged the progress of my App
2. The aforementioned bug popup occurs.
3. I widen the Log window to see where my App stops.
4. I rerun the App, no more logs, no error, not anything - IDE not frozen, can still edit, but not run
5. I restart the IDE, this time everything runs without error popup
6. I resize my log window to my normal and do some stuff and rerun
7. The error pops up and 2. to 6. repeats
8. I think it may be the "capacity" of the Log window, so I don't display the large number of lines.
9. Everything worked fine at that point, I moved on.
Since I was using v9.5 Beta and since I have never experienced this before, I thought I should report the error.
Apparently it is an old unresolved intermittent bug that I was unaware of.
It may be appropriate to change the title of this thread and/or for
@Erel to move it.