It happens to me when upgrading imagemagick from 6.8.9.9-7.2+b1 to 6.9.6.2+dfsg-2.
- Bug#841548: autopkgtest: FTBFS: Tests failures Lucas Nussbaum
- Bug#841548: autopkgtest: FTBFS: Tests failures Martin Pitt
- Bug#841548: autopkgtest: FTBFS: Tests failures Martin Pitt
- Bug#841548: Processed: Re: Bug#841548: autopkgtest: FT... Changwoo Ryu