Do not continue on corrupted wpg file. CVE assignment: http://seclists.org/oss-sec/2016/q2/459 Upstream patch: https://anonscm.debian.org/cgit/collab-maint/imagemagick.git/commit/?h=debian-patches/6.8.9.9-4-for-upstream&id=1eb3064a9e4a81d0b8cd414e3dcd7fe9b158f241