Comment 3 for bug 951783

The root problem is the following (from Apttermlog):

Installing new version of config file /etc/grub.d/20_memtest86+ ...^M
Generating grub.cfg ...^M
Segmentation fault^M
/usr/sbin/grub-probe: Fehler: cannot stat `'.^M
dpkg: error processing memtest86+ (--configure):^M
 subprocess installed post-installation script returned error exit status 1^M

There was likely a configuration error, that was manually made, in grub.cfg.