Aborting git rebase --edit-todo

When doing a commit or choosing what to do for an interactive rebase
one can just wipe the whole content of the editor, save and close to
abort the action.
While doing a `git rebase --edit-todo` I came to the conclusion that I
would like to abort the edit and did the same. The final `git rebase
--continue` got me rid of the rest of the commits...
(Fortunately the "missing" commits could be rescued by looking into
`.git/logs/HEAD` so thumbs up for that. )
Unfortunately the behaviour of `--edit-todo` was a bit surprising and
somehow doesn't feel consistent with the other actions involving an
editor.

Can this be considered a bug?

Best regards,
Victor