I've been having a problem lately where every few hours of use, for some reason I don't understand, Emacs stops responding to input without throwing an error.
Esc-Esc-Esc do nothing, so I'm forced to kill Emacs and restart it. Presumably, this has something to do with a change I recently made to my
.emacs, but I've made a lot of changes, and I don't see any good way to debug it. Recursively bisecting could entail spending weeks or months with a semi-functional editor, since the problem takes hours to show up and I don't know how to reliably reproduce it. Emacs isn't throwing an error, so debug on error doesn't help.
Is there some way I can start Emacs such that I can manually debug it on the fly, or so that it will give me a log of what Emacs was doing and I can look at the end to see what was going on when it stopped responding?