From: Ulrik Sverdrup <ulrik.sverdrup@gmail.com>
Date: Thu, 23 Mar 2017 17:17:40 GMT
Subject: Bug: Revert with -m 0 says no -m was given
Message-ID: <12e6fae3-a341-3dcd-0920-c3df2d54d0a8@gmail.com>

Hi,

Git produces a misleading error when you tell it `git revert -m 0`. The
user error is that the parent should be greater than zero, but git
doesn't help you. (I forgot that the first parent is 1 and not 0.)

$ git revert -m 0 abc
error: commit abc... is a merge but no -m option was given.
fatal: revert failed

Git already handles too large m correctly:

$ git revert -m 3 abc
error: commit abc... does not have parent 3
fatal: revert failed

-Ulrik