Re: commit gone after merge - how to debug?

From: Igor Lautar <igor.lautar@gmail.com>
Date: Nov 26, 2012, 13:58 UTC
Message-ID: <CAO1Khk8=nrKknfqY-k6XaGPDbLrHyrK-8fxfB7XXUWeB7L4EUA@mail.gmail.com>
In-Reply-To: <vpqehjgscv3.fsf@grenoble-inp.fr>

On Mon, Nov 26, 2012 at 2:38 PM, Matthieu Moy <Matthieu.Moy@grenoble-inp.fr> wrote:

Show 8 quoted lines

> Igor Lautar <igor.lautar@gmail.com> writes:
>> Somewhat, but it does not explain why the file no longer has that
>> change.
>
> It still has, but it's not shown by "git log <file>", probably because
> one of the parent of the merge commit introduces no change for this
> file, so one side of the merge is not needed to explain you how you went
> from the origin of time to the last commit.

No, the change is not there. See below.

Show 7 quoted lines

> Try this:
>
> commit=<sha1 of your merge commit>
> # Show diff with first parent:
> git diff "$commit" "$commit"^1
> # Show diff with second parent:
> git diff "$commit" "$commit"^2

Yes, change is shown in commit^2, but actual file after merge does not have it.

I've double and triple checked, it is just not there. In the end, I've cherry-picked the same commit after the merge and change is applied. If change would be there after the merge, cherry-pick would not have anything to do (whole commit is a one line change in single file).

So its not that the history is hidden, the change *is* missing after the merge.

Is there anything else I can try to figure out why its missing (other than actually debugging git code/scripts)? Like debug output for each change being considered/merged in?

Regards, Igor