I was also going to report the same error today. I have been seeing it on and off lately. And it goes away on doing "make bootstrap".

On Thu, Aug 9, 2018 at 6:16 PM Live System User <nyc4bos@aol.com> wrote:
Hi,

        I am getting the following errors when trying
        to compile the courrent master branch
        (see attachment).

        Thanks.

--

Kaushal Modi