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 fail... Martin Pitt
- Bug#841548: autopkgtest: FTBFS: Tests ... Martin Pitt
- Processed: Re: Bug#841548: autopkgtest: FT... Debian Bug Tracking System
- Processed: Re: Bug#841548: autopkgtest: FT... Debian Bug Tracking System
- Bug#841548: Processed: Re: Bug#841548:... Changwoo Ryu
- Bug#841548: marked as done (autopkgtest: F... Debian Bug Tracking System