pkg : Undefined symbol "openat"

[Erdos New]

hi, i'm trying to install a pkg on my freebsd10.1 system.

the system prompts for 'pkg' update, so i did:

root at oblivion:/usr/home/erdos # pkg install rtorrent
Updating FreeBSD repository catalogue...
Fetching meta.txz: 100%    944 B   0.9kB/s    00:01    
Fetching packagesite.txz: 100%    6 MiB   5.9MB/s    00:01    
Processing entries: 100%
FreeBSD repository update completed. 25856 packages processed.
New version of pkg detected; it needs to be installed first.
The following 1 package(s) will be affected (of 0 checked):

Installed packages to be UPGRADED:
        pkg: 1.6.2 -> 1.9.4_1

The process will require 97 KiB more space.
2 MiB to be downloaded.

Proceed with this action? [y/N]: y
Fetching pkg-1.9.4_1.txz: 100%    2 MiB   2.6MB/s    00:01    
Checking integrity... done (0 conflicting)
[1/1] Upgrading pkg from 1.6.2 to 1.9.4_1...
[1/1] Extracting pkg-1.9.4_1: 100%
/usr/local/lib/libpkg.so.3: Undefined symbol "openat"
root at oblivion:/usr/home/erdos # pkg install rtorrent
/usr/local/lib/libpkg.so.3: Undefined symbol "openat"


i also ran ' # freebsd-update fetch install'  but to no avail, i couldn't update/install any pkg, 'pkg' command keeps returning '/usr/local/lib/libpkg.so.3: Undefined symbol "openat" error.  

my system version is as follows:

root at oblivion:/usr/home/erdos # uname -a
FreeBSD oblivion 10.1-RELEASE-p35 FreeBSD 10.1-RELEASE-p35 #0: Sat May 28 03:02:45 UTC 2016     root at amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC  i386
root at oblivion:/usr/home/erdos # pkg --version
1.9.4