Building bud report Thunderbird

[Mathieu Demers]

Hi,

I tried to upgrade Thunderbird, but I always have an error when it is 
building. I tried more than one time, but it is always happen.

There are my infos:

FreeBSD Laptop-Mathieu 11.1-RELEASE FreeBSD 11.1-RELEASE #0 r321309: Fri 
Jul 21 02:08:28 UTC 2017 
root at releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

/usr/ports/mail/thunderbird/Makefile:
      $FreeBSD: head/mail/thunderbird/Makefile 453790 2017-11-09 
02:31:47Z jbeich $