Installer should tell you that you can't install grub to a location where it can't be installed instead of crashing

[syss]

Ubuntu 17.10 Budgie from 2018-01-05

While using the Ubuntu Installer
Selecting "Something else"
doing partition stuff, i can also select to use where to install the bootloader.
Installation of the OS succeeds, however if one installs the bootloader on a device which does not have a DOS partition table (maybe GPT works, i am not sure) it fails with "execution of grub-install failed" or similar.
The Problem was, where I wanted to install the bootloader had a ISO9660 partition table. (This was not the same device where I booted the live Ubuntu from.)

For a neater experience I would suggest a dialog, which asks to overwrite the partition table before trying to install the bootloader

[Ubuntu Foundations Team Bug Bot (crichton)]

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