RE: Nonexistent changes appear rebasing but only with rebase.backend=apply

Marco Giuliano wrote:

I have the following repository status:

   * commit 2 (BRANCH X)
   |
   |  * commit 4 (BRANCH Y) (HEAD)
   |  |
   |  * commit 3
   | /
   |/
   * commit 1
   |
   |
 (...)

What I'm trying to do is rebasing branch Y on branch X, with the command:
git rebase X

Have you tried using --onto?

  git rebase --onto X commt1

-- 
Felipe Contreras