Looks like after casper copies the squashfs to ram, it forgets to disconnect the loop device. The workaround is to run losetup -d /dev/loop0 and umount /isodevice.
Looks like after casper copies the squashfs to ram, it forgets to disconnect the loop device. The workaround is to run losetup -d /dev/loop0 and umount /isodevice.