bug#16479: 24.3.50; daemon freeze with tty menus

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: mvoteiza@udel.edu,  16479@debbugs.gnu.org
> Date: Sat, 25 Jan 2014 17:39:16 -0500
> 
> >   emacsclient -t
> > This pops down the menu, but the value of
> > overriding-terminal-local-map in the original frame is not restored,
> > so, for example, any cursor motion command signals an error because it
> > tries to invoke tty-menu commands.
> > What am I not doing correctly here?  TIA.
> 
> Maybe there's a bug in our handling of let-binding w.r.t terminal-local
> variables (i.e. the unbind of overriding-terminal-local-map ands up
> resetting that variable in the new terminal rather than in the terminal
> where the specbind was done).
> 
> I can't remember seeing code to handle that when I last touched the
> let-binding code, so it sounds very likely: we try and handle
> buffer-local and frame-local correctly (by remembering where the
> binding was installed a de-install it at the right place) but we don't
> do that same thing for terminal-local bindings.

Could this be related to the fact that Voverriding_terminal_local_map
is a per-keyboard variable?