ReactOS 0.4.12 does not boot
gnome-boxes 3.34.1-1 on Debian.
The install CD of ReactOS 0.4.12 shows a quick loading bar then a black screen. Installation is impossible under gnome-boxes.
If manually installed to the qcow2 image that gnome-boxes prepared, through an external instance of qemu, gnome-boxes succeeds to show ReactOS' logo and loading bar, then a BSOD appears.