Curious pkg upgrade behavior

[Scott Ballantyne]

Mike Clar writes:

> On 16 Sep 2017 15:23:54 -0000
> Scott Ballantyne <sdb at ssr.com> wrote:
> 
> > I was running samba43 prior to this. The second run of pkg uninstaled
> > Samba 43-4.3.11 and installed samba44-4.4.15. It also upgraded gvfs.
> 
> It would have been because of the upgrade of gvfs, it depends on
> samba44-4.4.15
> <https://www.freebsd.org/cgi/ports.cgi?query=gvfs&stype=all>

But this only punts the odd behavior to gvfs. Why not on the first run
of pkg upgrade? And why did smbd crash after the first run?