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From:   Junio C Hamano <gitster@pobox.com>
To:     Nick Snyder <nick@sourcegraph.com>
Cc:     git@vger.kernel.org
Subject: Re: git blame --reverse doesn't find line in HEAD
References: <CA+SQVf1W6BhNyB6bGxh7WfCwb6+E3pNjHLeS4xDYPJ6BLT8cng@mail.gmail.com>
        <CA+SQVf24rcQ1iKAQBW0Ky7Qm8zuF3Esw8qMKvG+KCbCA-mCcfA@mail.gmail.com>
Date:   Wed, 06 Dec 2017 09:22:21 -0800
In-Reply-To: <CA+SQVf24rcQ1iKAQBW0Ky7Qm8zuF3Esw8qMKvG+KCbCA-mCcfA@mail.gmail.com>
        (Nick Snyder's message of "Wed, 6 Dec 2017 07:40:35 -0800")
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Nick Snyder <nick@sourcegraph.com> writes:

> This can be reproduced on Linux and Mac. This behavior seems to be a bug.

Can you bisect to see when the feature stopped working as you expect?

Unlike a forward blame, where the command tries to find a commit
that is responsible for a line being in the final result (i.e.
typically, HEAD), a reverse blame is not about finding a commit
that is responsible for a line (that used to be in the oldest
commit) not being in a more recent codebase.  It finds up to which
commit each line survived without getting touched since the oldest
commit in the range.