From aed4fdb28177b787e2d6a32a14f664df68cc7fa4 Mon Sep 17 00:00:00 2001
From: Gareth Rees <gdr@ravenbrook.com>
Date: Sat, 7 Jul 2018 21:40:32 +0100
Subject: [PATCH] Branching master to branch/2018-07-07/roots-walk.

Copied from Perforce
 Change: 194500