Comment 0 for bug 1707015

We use php-imagick to make image compositions on our servers. On July 25 we got an upgrade of imagemagick, from 6.8.9.9-7ubuntu5.7 to 8:6.8.9.9-7ubuntu5.8. After that upgrade our webservers, using the php imagick bindings, stopped making composites. The composite images just have the background layer showing, with no overlay layer composited on top.

In PHP there are no errors or exceptions, and other imagick functions work fine. Reading images, scaling, making new images, rendering to bytes, all work fine. It is only the composite functions, in php bindings, that are not working.

I downgraded our webservers to imagemagick 6.8.9.9-7ubuntu5, which is still available in the ubuntu archives, and the php composite functions started working again. 6.8.9.9-7ubuntu5.7 is no longer available in the archives (http://security.ubuntu.com/ubuntu/pool/main/i/imagemagick/).

A test script to reproduce the bug is attached to this ticket. On version 6.8.9.9-7ubuntu5 this will show the ubuntu logo over a gray background. On the latest version, 6.8.9.9-7ubuntu5.8, this will show garbled fragments of the ubuntu logo over gray background, or perhaps just an empty gray background.

This bug was identified on Ubuntu 16.04.2 LTS