Comment 2 for bug 1943055

Chatted with Alex more. So the issue was a zero byte qcow2 file going into qemu-img convert. If this happens, it returns an exit code of "0" and creates a zero byte raw file. My best guess is it thinks it is actually reading a raw input as there is no header. It creates the output file which is also zero bytes. Anyhow, I've confirmed this is the case manually.