From debdf8ce55d2d42c15bc99a09bd2c37c4c910630 Mon Sep 17 00:00:00 2001
From: David Tardon <dtardon@redhat.com>
Date: Sat, 18 Nov 2017 10:06:24 +0100
Subject: [PATCH] ofz#4303 avoid signed integer overflow

/usr/include/boost/spirit/home/qi/numeric/detail/real_impl.hpp:110:26: runtime error: signed integer overflow: -2147483647 - 19 cannot be represented in type 'int'
---
 include/boost/spirit/home/qi/numeric/detail/real_impl.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/boost/spirit/home/qi/numeric/detail/real_impl.hpp b/include/boost/spirit/home/qi/numeric/detail/real_impl.hpp
index 3e7ab18a9..4a65bd79c 100644
--- a/include/boost/spirit/home/qi/numeric/detail/real_impl.hpp
+++ b/include/boost/spirit/home/qi/numeric/detail/real_impl.hpp
@@ -108,6 +108,8 @@ namespace boost { namespace spirit { namespace traits
     inline bool
     scale(int exp, int frac, T& n, AccT acc_n)
     {
+        if (exp < std::numeric_limits<int>::min() + frac)
+            return false;
         return scale(exp - frac, n, acc_n);
     }
 
-- 
2.14.3