When choosing to assign / to a 0x0b (WIndows) partition, it warns me that I should not do that, that is has speed penalties (why?) and when I insist, it crashes. I'll attach the Anaconda dump as a file to this bug.
Created attachment 1740 [details] Anaconda dump (traceback)
Was the windows partition formatted with a FAT-style filesystem?
No. It was actually an ext2 filesystem, but before installation I changed the partition type to 0x0b (it was for some tests I was doing with the installer).
This defect is considered MUST-FIX for Winston Gold-release
You have to manually format DOS filesystems for loopback installs; we don't format devices automatically.
What do you mean with "loopback installs"? Whatever that means, at least Anaconda shouldn't crash.