The VirtualBox gui crashes when you want to add an existing hard disk to
a SATA controller.
Steps to reproduce:
Select a Machine -> Settings -> Storage -> Controller: SATA -> Add hard
disk -> Choose existing disk
Then you will see the following message when you have started the Oracle
VM VirtualBox Manager in a terminal:
Qt WARNING: libpng warning: iCCP: known incorrect sRGB profile
(VirtualBox:7254): Gdk-WARNING **: gdkwindow-x11.c:5554 drawable is not
a native X11 window
 7254 segmentation fault VirtualBox
The corresponding machine had no hard disk applied. I guess I have to
use some Command line to get the machine up again...