[Pkg-gmagick-im-team] Bug#835650: Imagemagick regression pin point patch

[Bastien ROUCARIES]

Hi,

Patches are needed for a security point of view but it is likely a
problem of backport intereaction.

Could you help by pin point the problem.

as root install a few package needed for imagemagick compilation:
apt-get install git
apt-get build-dep imagemagick

as a user
 git clone   git://git.debian.org/git/collab-maint/imagemagick.git
cd imagemagick
git checkout debian-patches/6.8.9.9-5+deb8u4
git bisect start
git bisect bad
git bissect good debian-patches/6.8.9.9-5+deb8u3

  Once you have specified at least one bad and one good commit, git
bisect selects a commit in the middle of that range of history, checks
it out, and outputs something similar to the following:

           Bisecting: 675 revisions left to test after this (roughly 10 steps)

 You should now compile the checked-out version and test it. If that
version works correctly, type. Compiling is done by typing
./configure
make check

you could run the command without installing by runing the convert.sh wrapper
./magick.sh convert geometry 40% tux.png tux-scaled-old.ppm

if bad run
git bisect bad
and rerun compile and testing
if good run
git bisect good

Some pointer could be found in man git bisect

Bastien