bug#73548: 31.0.50; track-changes--error-log

[Stefan Monnier via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

> the only "extra" I have running in C buffers is eglot, with
> eglot-ensure in c-mode-common-hook. Don't know if Eglot changes the
> buffer, maybe when it wants to add diagnostics?

Hmm... I don't think Eglot would make changes to the buffer behind
your back.

Not sure what more we can do with this report if you can't reproduce it.
But in case you do see it "every once in a while", then I pushed to
`master` some extra debugging support in `track-changes.el`.

So, try and `(setq track-changes-record-errors 'trace)` in your init
file to activate this extra debugging info, so that next time you hit
the problem we have a better chance of catching the sucker.


        Stefan