From 4e8e716c5a373ae77400a5e955665bf8a7b017e9 Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <patrick.pelissier@gmail.com>
Date: Fri, 24 Mar 2017 18:02:34 +0100
Subject: [PATCH] Fix potential issue in MT.

---
 m-snapshot.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/m-snapshot.h b/m-snapshot.h
index a5475cbc..80222cc7 100644
--- a/m-snapshot.h
+++ b/m-snapshot.h
@@ -84,7 +84,8 @@
 	 && SNAPSHOTI_W(flags) != SNAPSHOTI_F(flags))
 #define SNAPSHOTI_CONTRACT(snap)	do {                            \
     assert((snap) != NULL);						\
-    SNAPSHOTI_FLAGS_CONTRACT((snap)->flags);				\
+    uint_fast8_t f = (snap)->flags;                                     \
+    SNAPSHOTI_FLAGS_CONTRACT(f);                                        \
   } while (0)
 
 #define SNAPSHOTI_DEF2(name, type, oplist)				\