This bug was fixed in the package xorg-server - 2:1.19.5-0ubuntu2
--------------- xorg-server (2:1.19.5-0ubuntu2) artful; urgency=medium
* Backport upstream patch to fix cropping in XShmGetImage (LP: #1723732).
-- Dmitry Shachnev <email address hidden> Sun, 15 Oct 2017 14:59:53 +0300
This bug was fixed in the package xorg-server - 2:1.19.5-0ubuntu2
---------------
xorg-server (2:1.19.5-0ubuntu2) artful; urgency=medium
* Backport upstream patch to fix cropping in XShmGetImage (LP: #1723732).
-- Dmitry Shachnev <email address hidden> Sun, 15 Oct 2017 14:59:53 +0300