That used to crash machines too. Or create issues when the user did that plus wanted to tinker with partitions later.

Let's chalk this up to "not everything works with everything." Now that you know the failsafe is not safe it's time to write it as something you can't use.

Let me part with something I am doing. I'm using CLONEZILLA to write an image of my hard drive to an external drive. Since that takes hours I schedule this for a time I can let it finish.
Bob