Strange behavior of C-u in the presence of sit-for in p-c-h

[Stefan Monnier]

Try the following:

  emacs -Q --eval "(add-hook 'post-command-hook (lambda () (sit-for 0.5)))"

you'll notice that all works apparently well, except that if you hit the
universal prefix C-u, then any key pressed before the 0.5s delay will
be ignored, and after the 0.5s delay you end up with "C-u-" in the
echo area.


        Stefan