GNU bug report logs - #31771
26.1; [imagemagick] Writing image file with emacs hangs entire system

Previous Next

Full log

View this message in rfc822 format

From: Adam <adam.niederer <at> gmail.com>
To: Noam Postavsky <npostavs <at> gmail.com>
Cc: 31771 <at> debbugs.gnu.org
Subject: bug#31771: 26.1; Writing image file with emacs hangs entire system
Date: Sun, 10 Jun 2018 13:53:30 -0400

On 06/09/2018 10:53 PM, Noam Postavsky wrote:
> So it definitely sounds like a graphics driver problem.  Do you get
> anything in the Xorg logs?  Are there any graphics driver settings you
> can fiddle with?  I suppose it doesn't happen if you run imagemagick's
> 'display' command on the image?

`display` doesn't hang my system, and I see nothing out of the ordinary
in my Xorg logs. I was able to figure out which line causes the hang,
though: A call to MagickMergeImageLayers at image.c:8728 (on the emacs
26.1 tag)

 8724   {
 8725     MagickWand *new_wand;
 8726     MagickSetImageBackgroundColor (image_wand, bg_wand);
 8727 #ifdef HAVE_MAGICKMERGEIMAGELAYERS
 8728     new_wand = MagickMergeImageLayers (image_wand, MergeLayer);
 8729 #else
 8730     new_wand = MagickFlattenImages (image_wand);
 8731 #endif
 8732     DestroyMagickWand (image_wand);
 8733     image_wand = new_wand;
 8734   }

Using the deprecated MagickFlattenImages call also causes the hang. I'll
compile a libmagick6 later and see if I can find the underlying problem,
but this definitely isn't emacs' fault.

Thanks for all the help!

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.