F30 QEMU migration of a F21 image failed to start

[Robert Moskowitz]

First I installed QEMU on F30:

dnf groupinstall "virtualization"
dnf install qemu virt-manager libvirt
systemctl enable libvirtd
systemctl start libvirtd
systemctl enable libvirt-guests
systemctl start libvirt-guests

I backed up my fedora21.qcow2 from my old F28 system and then copied it 
to the new F30 system.  The target directory on each system is:

/var/lib/libvirt/images

I started QEMU, then went through the steps of migrating an image. This 
worked with this F21 image from F21 to F24 and again to F28. This image 
has some restricted content data that I work with in this manner.

This time, with F30, the migration failed and kept looping based on what 
I saw in the QEMU session via a <Alt-D>.

Anyone working with QEMU with EOL Fedora images?