From 606737112777d4e0457da4700da011cd38ed6ea1 Mon Sep 17 00:00:00 2001
From: Howard Hinnant <howard.hinnant@gmail.com>
Date: Thu, 6 Jul 2017 11:54:55 -0400
Subject: [PATCH] Don't pass ill-formed strings to stold

* Avoid exceptions coming out of stold.
* from_stream should always set failbit instead of throw.
---
 date.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/date.h b/date.h
index abd7646..46b9751 100644
--- a/date.h
+++ b/date.h
@@ -5334,7 +5334,10 @@ read_long_double(std::basic_istream<CharT, Traits>& is, unsigned m = 1, unsigned
             break;
     }
     if (count < m)
+    {
         is.setstate(std::ios::failbit);
+        return 0;
+    }
     return std::stold(buf);
 }