'[: =: unexpected operator' during console upgrade

[dvl]

Today I successfully upgraded from 2.4.4-RELEASE to FreeBSD 11.2-RELEASE-p4

During the 'Update from console' process, I noticed this output:

Installed packages to be UPGRADED:
	pfSense-kernel-pfSense: 2.4.4 -> 2.4.4_1 [pfSense-core]

Number of packages to be upgraded: 1
[1/1] Upgrading pfSense-kernel-pfSense from 2.4.4 to 2.4.4_1...
[1/1] Extracting pfSense-kernel-pfSense-2.4.4_1: .......... done
===> Keeping a copy of current kernel in /boot/kernel.old
[: =: unexpected operator
>>> Removing unnecessary packages... done.
Upgrade is complete.  Rebooting in 10 seconds.
                                                                               
Broadcast Message from admin@bast.int.unixathome.org                           
        (/dev/pts/0) at 22:20 UTC...                                           
                                                                               
Upgrade is complete.  Rebooting in 10 seconds.                                 

Full output is at https://gist.github.com/dlangille/cabfd7555f6248581bfb98b363acfc69 in case it helps.

[Gertjan]

See here :
https://forum.netgate.com/topic/138343/2-4-4-2-4-4-p1-unexpected-operator
https://forum.netgate.com/topic/138330/pfsense-2-4-4-release-p1-is-now-available/12