RE: kill-emacs-query-functions problem with y-or-n-p

[Drew Adams]

        I did run through the debugger (debug-on-entry foo), checking
        last-nonmenu-event at each step. The value remained
        `(menu-bar)' throughout,
        right up through debugger-reenable in run-hooks(post-command-hook).

    Why was post-command-hook being run?  We're talking about code
    in the middle
    of kill-emacs; it does not read commands, and Emacs should never read
    another command once you start killing it.  Perhaps the Lisp debugger
    interfered.

I don't know. I did debug-on-entry foo. The trace starts like this:

* run-hooks(activate-menubar-hook)
* y-or-n-p("foo? ")
* foo()
  run-hook-with-args-until-failure(foo)
  save-buffers-kill-emacs(nil)
  call-interactively(save-buffers-kill-emacs)

Perhaps the debugger itself is interfering.

    The way to handle this best is by debugging at the C level,
    with breakpoints and stepping in Fkill_emacs and Fy_or_n_p
    and their subroutines.

Sorry; I don't know how to do that, and I don't have the time now, in any
case.