GNU bug report logs - #78110
31.0.50; Segfault in XFindContext

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From: Eli Zaretskii <eliz <at> gnu.org>
To: Po Lu <luangruo <at> yahoo.com>
Cc: 78110 <at> debbugs.gnu.org, visuweshm <at> gmail.com
Subject: bug#78110: 31.0.50; Segfault in XFindContext
Date: Sat, 10 May 2025 12:50:20 +0300

Ping!  Po Lu, could you please chime in?

> Cc: 78110 <at> debbugs.gnu.org
> Date: Mon, 28 Apr 2025 15:50:25 +0300
> From: Eli Zaretskii <eliz <at> gnu.org>
> 
> > From: Visuwesh <visuweshm <at> gmail.com>
> > Date: Mon, 28 Apr 2025 16:30:08 +0530
> > 
> > I am not sure how I managed to trigger this segfault since I was trying
> > to copy some text to the kill-ring so it shouldn't have triggered the
> > popup menu but...here we are.  The vz/ispell-at-click command presents a
> > popup menu of suggestions for the misspelt word:
> > 
> >     (defun vz/ispell-at-click (click)
> >       "Check the spelling of the word at mouse click CLICK."
> >       (interactive "@e")
> >       (save-excursion
> >         (mouse-set-point click)
> >         (ispell-set-spellchecker-params) ; Initialize variables and dicts alists
> >         (ispell-accept-buffer-local-defs)   ; use the correct dictionary.
> >         (pcase-let* ((`(,word ,beg ,end) (ispell-get-word ispell-following-word))
> >                      (poss (ispell--run-on-word word)))
> >           (if (or (eq poss t) (stringp poss))
> >               (message "%s is correct" (funcall ispell-format-word-function word))
> >             (let ((corr (x-popup-menu
> >                          click
> >                          (list (concat "Correction for "
> >                                        (funcall ispell-format-word-function word))
> >                                (cons ""
> >                                      (mapcar (lambda (x) (cons x x))
> >                                              (nth 2 poss)))))))
> >               (replace-region-contents beg end corr))))))
> > 
> > The build details in the bug report is the same as that for the
> > segfaulted Emacs.  I generated the core file for the crashed Emacs so
> > hopefully I can provide more value out of the backtrace this time
> > around.  For posterity, I am using Xfce.
> > 
> > (gdb) bt
> > #0  0x00007ffff78d9474 in XFindContext () at /lib/x86_64-linux-gnu/libX11.so.6
> > #1  0x00007ffff7bb29da in _XmRCColorHook () at /lib/x86_64-linux-gnu/libXm.so.4
> > #2  0x00007ffff7d645e3 in ??? () at /lib/x86_64-linux-gnu/libXt.so.6
> > #3  0x00007ffff7d6508d in ??? () at /lib/x86_64-linux-gnu/libXt.so.6
> > #4  0x00007ffff7d654a0 in _XtCreateWidget () at /lib/x86_64-linux-gnu/libXt.so.6
> > #5  0x00007ffff7d6574a in XtCreateWidget () at /lib/x86_64-linux-gnu/libXt.so.6
> > #6  0x00007ffff7af8e6b in ??? () at /lib/x86_64-linux-gnu/libXm.so.4
> > #7  0x00007ffff7afbd32 in XmCreatePopupMenu () at /lib/x86_64-linux-gnu/libXm.so.4
> > #8  0x00005555557e3077 in make_popup_menu (instance=<optimized out>) at lwlib-Xm.c:1521
> 
> Po Lu, any ideas?
> 
> 
> 
> 

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