GNU bug report logs - #11984
24.1; segfault while deleting a window

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From: martin rudalics <rudalics <at> gmx.at>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 11984 <at> debbugs.gnu.org, cyd <at> gnu.org, russell.sim <at> gmail.com
Subject: bug#11984: 24.1; segfault while deleting a window
Date: Wed, 25 Jul 2012 09:15:03 +0200

> If you built Emacs with the change, and tooltips work for you,

How do I test it?  Is evaluating

(x-show-tip "???")

enough?

> then I
> see no reason why they won't for me.

Because tooltip frames appear fragile.  x_create_tip_frame uses

  Fset_window_buffer (FRAME_ROOT_WINDOW (f), buffer, Qnil);

while make_frame has

    /* Use set_window_buffer, not Fset_window_buffer, and don't let
       hooks be run by it.  The reason is that the whole frame/window
       arrangement is not yet fully initialized at this point.  Windows
       don't have the right size, glyph matrices aren't initialized
       etc.  Running Lisp functions at this point surely ends in a
       SEGV.  */
    set_window_buffer (root_window, buf, 0, 0);

Wouldn't the fact that the frame has not been set up completely when
assigning a buffer to its root window suggest that Fset_window_buffer
should not be used here either?

martin

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