Hello, this issue seems already be handled in bug #1019158, and be caused by an unexpected ABI change in graphicsmagick.
This should already be fixed by graphicsmagick 1.4+really1.3.38+hg16739-1 in unstable. Unfortunately it did not yet migrate to testing because of a test failure on mips64el. https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1019158 Kind regards, Bernhard
