bug#22581: Strange minibuffer prompt on exiting Emacs

[martin rudalics <rudalics@gmx.at>]

 > The prompt to confirm exiting Ediff has gone a bit strange. To
 > reproduce in "emacs -Q" (assuming files "x" and "y" exist in the
 > working directory):
 >
 > M-x ediff RET x RET y RET q
 >
 > The expected prompt is
 > "Quit this Ediff session? (y or n)  ".
 >
 > The actual text shown in the minibuffer is
 > "Quit this Ediff session? (y or n)  switch-frame-".
 >
 > (The frame switch event occurred because the little Ediff control
 > panel frame went away and the main frame got activated.)
 >
 > The "switch-frame-" is of course not really part of the prompt. It is
 > rendered like what you get when you enter an incomplete key sequence,
 > like "C-x-". It seems as though switch-frame is being treated as a
 > prefix key, but it's not treated as such in most circumstances. Try
 > this for example:
 >
 > C-x 5 2 ;; make-frame-command
 > C-h k ;; describe-key
 > ;; Use the window manager to activate the other frame.
 > ;; Minibuffer prompt is "Describe key (or click or menu item):  switch-frame-")
 > RET
 > ;; *Help* buffer describes "RET", not "switch-frame RET".

Thanks for the report.  This is the same as bug#21797.

Bug#22068 is another instance of this.

martin