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bug#30519: 26.0.91; Emacs hangs with flyspell overlay


From: Romanos Skiadas
Subject: bug#30519: 26.0.91; Emacs hangs with flyspell overlay
Date: Tue, 20 Feb 2018 00:33:44 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0


On 19/02/18 23:47, Dmitry Gutov wrote:
On 2/19/18 6:32 PM, Eli Zaretskii wrote:

Emacs hangs with repeating error "Marker does not point anywhere". You
can clear the hang by moving the mouse pointer.

Not reproducible here.  Could this be X-specific (I tried on Windows)?

I can reproduce this in emacs-26 (Ubuntu 17.10 with GTK3 here).



I can see it as well on emacs 27, Ubuntu 17.10 w/ GTK3. This is where it comes from:

Thread 1 "emacs" hit Breakpoint 1, marker_position (marker=0x3463451) at marker.c:641
641        error ("Marker does not point anywhere");
(gdb) l
636    {
637      register struct Lisp_Marker *m = XMARKER (marker);
638      register struct buffer *buf = m->buffer;
639
640      if (!buf)
641        error ("Marker does not point anywhere");
642

buf is null.

It's a bit too late here to dig into this more.






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