Bug#860317: upgrade to latest stretch version breaks

[Brent S. Elmer Ph.D.]

On Sat, 2017-04-15 at 13:33 +0200, Andreas Metzler wrote:
> On 2017-04-14 "Brent S. Elmer" <webe3vt at aim.com> wrote:
> > Package: exim4
> > Version: 4.89-1
> > Severity: normal
> > I upgraded packages in stretch and there was a problem upgrading
> > exim4.  When I
> > try to do a reinstall of exim4 to try to fix it using synaptic, I
> > get:
> 
> [...]
> > Apr 14 08:30:06 brente systemd[1]: Starting LSB: exim Mail
> > Transport Agent...
> > Apr 14 08:30:06 brente exim4[27992]: Starting MTA: exim4.
> > Apr 14 08:30:06 brente exim4[27992]: ALERT: exim paniclog
> > /var/log/exim4/pa…oken
> > Apr 14 08:30:06 brente systemd[1]: exim4.service: PID file
> > /run/exim4/exim.…tory
> > Apr 14 08:30:06 brente systemd[1]: exim4.service: Daemon never
> > wrote its
> > PI…ing.
> > Apr 14 08:30:06 brente systemd[1]: Failed to start LSB: exim Mail
> > Transport…ent.
> 
> Anything in the exim logfiles?
> 
> cu Andreas
> 

paniclog and mainlog contains this:

2017-04-17 14:30:26 IPv6 socket creation failed: Address family not
supported by protocol