From 073225cb01d9c2629c7a423dbe6afcd07601ffb7 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Thu, 28 Apr 2016 13:35:16 +0200
Subject: [PATCH] chain: define enum used as bit field as uint32_t

Bitwise logic combined with `<` with undefined signedness will
potentially results in undefined behavior. Fix this by defining the type
as a c++11 typed enum.

Fixes #6017.
---
 src/chain.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/chain.h b/src/chain.h
index 5b9605a80..017d4fe45 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -54,7 +54,7 @@ struct CDiskBlockPos
 
 };
 
-enum BlockStatus {
+enum BlockStatus: uint32_t {
     //! Unused.
     BLOCK_VALID_UNKNOWN      =    0,