[Bug 287720] ports-mgmt/pkg: segfault if calledwith root privileleges

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=287720

            Bug ID: 287720
           Summary: ports-mgmt/pkg: segfault if calledwith root
                    privileleges
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: pkg@FreeBSD.org
          Reporter: alexey@ocaml.nl
             Flags: maintainer-feedback?(pkg@FreeBSD.org)
          Assignee: pkg@FreeBSD.org

I have a really strange problem. It appeared on one of my 14.3-RELEASE machines
after source upgrade. Another machine underwent the same upgrade, albeit in
binary way (via freebsd-update) and has no such problem.

🌐 eldanna in ~ took 3h57m37s
❯ sudo pkg-static upgrade -f pkg
Updating FreeBSD repository catalogue...
FreeBSD repository is up to date.
Updating FreeBSD-kmods repository catalogue...
FreeBSD-kmods repository is up to date.
All repositories are up to date.
Checking integrity... done (0 conflicting)
The following 1 package(s) will be affected (of 0 checked):

Installed packages to be REINSTALLED:
        pkg-2.2.0 [FreeBSD]

Number of packages to be reinstalled: 1

Proceed with this action? [y/N]: y
[1/1] Reinstalling pkg-2.2.0...
[1/1] Extracting pkg-2.2.0: 100%
You may need to manually remove /usr/local/etc/pkg.conf if it is no longer
needed.
🌐 eldanna in ~ took 4s
❯ /usr/local/sbin/pkg search foobar
🌐 eldanna in ~
❯ sudo !!
sudo /usr/local/sbin/pkg search foobar
Child process pid=71720 terminated abnormally: Segmentation fault
🌐 eldanna in ~
❯ freebsd-version
14.3-RELEASE

Core file is mostly useless:
❯ sudo gdb -core pkg.core
[...]
[New LWP 1048325]
Core was generated by `pkg search foobar'.
Program terminated with signal SIGSEGV, Segmentation fault.
Address not mapped to object.
#0  0x00000008279bb8da in ?? ()
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Segfault happens after every operation, performed as root, but the operation
itself is first performed.

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