Re: Merging tags does not fast-forward with git 1.7.9

On Thu, Feb 09, 2012 at 10:50:50AM -0500, Dan Johnson wrote:

On Thu, Feb 9, 2012 at 4:54 AM, Domenico Andreoli [off-list ref] wrote:

quoted

  with the recent changes in tag merging (I updated git to 1.7.9),
my usual "git merge v3.X-rcY" command does not fast-forward any more.
Of course the initial head is something like "v3.X-rcZ" without any
change so that it should (and usually did) fast-forward to the new head.

The editor is instead fired off and I have to fill the details of a
merge commit, diverging from mainline as soon as I save and exit.

Is there any simple and clear explanation for this? Thank you.

Someone else can explain what is going on more fully, but can you
report what happens when you run "git merge --ff-only v3.X-rcY"?

This is Debian unstable, out-of-the-box git package 1.7.9-1.

$ git reset --hard v3.3-rc2
HEAD is now at 62aa2b5 Linux 3.3-rc2
$ git merge --ff-only v3.3-rc3
fatal: Not possible to fast-forward, aborting.
$ 

Same for v3.3-rc1 -> v3.3-rc2.

Thanks,
Domenico