Bug#876565: ImageMagick crashes (assertion failure) when opening a malformed image file

[Evgeny Kapun]

Package: imagemagick-6.q16
Version: 8:6.9.7.4+dfsg-16

An image that causes the crash is attached.

$ identify image.png
identify: ../../magick/quantum.c:216: DestroyQuantumInfo: Assertion 
`quantum_info != (QuantumInfo *) NULL' failed.
Aborted