Re: Weird behavior and crash with X and TTY frame

[Dmitry Antipov <dmantipov@yandex.ru>]

On 04/07/2013 04:06 PM, Jan Djärv wrote:

> This is something Emacs can't handle.  It is because how the lisp and event loop interracts.
>
> When you do (x-popup-dialog t '("Test" ("yes" . 1))), a Lisp return value is expected back to the Lisp code.
> So Emacs does not execute any more Lisp, until the dialog is popped down.
> The popup is shown by a loop that just processes X events (x_menu_wait_for_event).
> When you switch frame and do C-g C-g, the "normal" stuff does not happen, because Lisp is not executed.
>
> This would be solvable if we had an independent Lisp loop per terminal, but it is not so.
> There is only one Lisp loop, shared by all frames/terminals, and if one frame/terminal suspends the loop,
> it is suspended for all frames/terminals.

Yes, but the same trick with two X frames doesn't crash at least; first C-g on
X frame 2 cancels popup raised on frame 1 and resumes normal event processing loop.

Dmitry