Re: issue upgrading git from 1.8.2.1 to 2.8.0

Stefan Beller [off-list ref] writes:

Although 1.8..2.8 is a lot, Git ought to stay compatible there.

In principle that is true, but there were deliberate backward
incompatible changes at around 2.0 boundary, and those who followed
along the upgrade paths were given warnings and advice messages to
guide them to adjust their configurations during the incremental
upgrade path.  It is not all that surprising if somebody who jumped
between the two versions in one hop didn't benefit from any such
guidance, though.

Offhand, perhaps .git/config left by ancient versions and recent
versions may differ in such a way that it affects the particular
workflow deployed there?