This regression was introduced by commit 0aa958d (rebase: replace
antiquated sed invocation, 2010-01-24), which changed the invocation of
"git rev-list | sed" to "git log".
It can be reproduced by something like this:
$ git rebase -s recursive origin/master
Signed-off-by: Markus Heidelberg <markus.heidelberg@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>