Aborting 'rebase main feat' removes unversioned files

[Fedor Biryukov <fedor.birjukov@gmail.com>]

Looks like a bug in git rebase main feat.

To reproduce:
git init
git commit -m 'init' --allow-empty
git checkout -b feat
echo 123 > readme.txt
git add readme.txt
git commit -m 'txt=123'
git checkout main
echo 012 > readme.txt
git rebase main feat
git rebase --abort

Expected result:
readme.txt contains 012

Actual result:
readme.txt contains 123

According to the docs, git rebase main feat is a shorthand for git checkout feat followed by git rebase main. I have checked that doing checkout and rebase separately instead of using the shorthand does not have the same issue.

Cheers!

Fedor