Hi,

I CC the list, as we are currently on freeze, but this might require a
fix or at least a big explanation somewhere, my bad for not answering
soon enough. :-(

Marinus Savoritias <marinus.savoritias@disroot.org> writes:
> Hi,
>
> The steps that I followed were:
>
> 1. Use guided installation using full disk with graphical installer
>
> 2. I selected use entire disk and not a separate /home
>
> 3. It gave me the warning that its going to format the disk.

Testing this I think this warning may be the confusion source.  "All
data will be lost" doesn't include in this case the old ESP partition
(the one in /boot/efi) as that one is not removed when it exists.

> [...] I curiously found that the files from the previous installation
> of Gentoo were there. Even though the installer said that it formatted
> the disk.

To clarify this I propose the attached patch.

> I was using the default that the guided installation uses. I didn't
> change anything there.

Probably it's too late to add new options to that list, or a new
selection step when the partitioning is guided asking if esp should be
kept, as the tests have to be updated too.

> At that point as I said I formatted the disk separately to make sure
> it was properly formatted this time but the same thing happened.
>
> The only way I could work around the bug was by selecting the manual
> partitioning instead of guided in the graphical installer.

I'm throwing a guess here: did you format the root partition but not
/boot/efi the second time?

Happy hacking!
Miguel