From a5fcf4ecd02c6a0b22d4e4c51c962dabf945454c Mon Sep 17 00:00:00 2001
From: Gav Wood <i@gavwood.com>
Date: Wed, 13 May 2015 00:26:43 +0300
Subject: [PATCH] Extra diagnostics, assertions and fail-safes for tracking
 BadRoot bug.