Incompatible Unison update

[Stephen Warren]

On Thu, February 21, 2008 10:55 am, Jeff Spaleta wrote:
> On Thu, Feb 21, 2008 at 7:14 AM, Stephen Warren
> <s-t-rhbugzilla at wwwdotorg.org> wrote:
>>  https://bugzilla.redhat.com/show_bug.cgi?id=433742
>>
>>  I assume I'm correct in saying this was the wrong thing to do. What is
>>  other people's take on this?
>
> First question... how significant of a problem is the incompatibility.
> The bug report doesn't go into details. Are we talking configuration
> syntax change? Are we talking data loss?

The Unison application uses a network protocol, which include transferring
the application version number in the connection set up.

Unison version A.B.C refuses to talk to any Unison with version other than
A.B.X (or even A.B.C in some older releases).

Hence, without updating other systems, the connection will fail to
initiation, and there's no workaround that I know of.

> The third question, would you have been just as upset if the
> application version changed between F8 and F9... instead of as an
> update?

No. It would have been inconvenient, but anything goes in a new OS
release; that's why one installs it on a test system first!