The if-else cases in lsqr.py were not exhaustive. They become exhaustive by changing ab > aa to ab >= aa.
From: Dmitriy Morozov <dmitriy@mrzv.org>
Date: Tue, 09 Sep 2008 18:03:00
State: resolved
Subject: Boost 1.36
Message-Id: <96b51b44f7764f5c-0-artemis@cole>
resolution: fixed
Make the software compile with Boost 1.36