bug#31692: Emacs sometimes drops key events

[Noam Postavsky]

Radon Rosborough <radon.neon@gmail.com> writes:

> I noticed that whenever a key is dropped, the text "Quit" is logged in
> the *Messages* buffer. However, `keyboard-quit' doesn't get called; I
> checked by adding an advice. Something in the C code causes a quit
> event to be signaled and also aborts the processing of my key event,
> apparently.

Maybe you could run under a debugger and make it print a backtrace when
a quit happens?

break quit
commands
  silent
  bt
  continue
end

set height 0 # don't page