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Subject: release build fails due to mesa-libs python version mismatch
From: David Boyd <David.Boyd49@twc.com>
To: freebsd-stable@freebsd.org
Date: Wed, 12 Dec 2018 13:05:18 -0500
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When attempting to build releng/11.2 (11.2-RELEASE-p6) via the
release.sh process, the build fails with the following message:

"mesa-libs-18.1.9 needs Python 2.7 at most, but 3.6 was specified"

I was attempting to build using PORTBRANCH="ports/branches/2018Q4".

Building with PORTBRANCH="ports/branches/2018Q3" works normally.

The release process also fails if PORTBRANCH="ports/head@rHEAD" is
used.

Specifying NOPORTS=yes also allows the build to complete normally, but
forces NODOC.

Thanks, in advance, for any help that you may be able to provide.