From 0efd05d9344882e852f2f0250584a260dd7301a5 Mon Sep 17 00:00:00 2001
From: "Billy O'Neal (VC LIBS)" <bion@microsoft.com>
Date: Mon, 8 Apr 2019 19:24:10 -0700
Subject: [PATCH] Paranoia for overflow of sprintf buffer in the year 10000

---
 Release/src/utilities/asyncrt_utils.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Release/src/utilities/asyncrt_utils.cpp b/Release/src/utilities/asyncrt_utils.cpp
index 986b64bb73..a2fe96b81e 100644
--- a/Release/src/utilities/asyncrt_utils.cpp
+++ b/Release/src/utilities/asyncrt_utils.cpp
@@ -649,6 +649,10 @@ utility::string_t datetime::to_string(date_format format) const
     const int64_t input = static_cast<int64_t>(m_interval / _secondTicks); // convert to seconds
     const int frac_sec = static_cast<int>(m_interval % _secondTicks);
     const time_t time = static_cast<time_t>(input - ntToUnixOffsetSeconds);
+    if (static_cast<uint64_t>(time) > 253370764800ull) {
+        throw std::out_of_range("The requested year exceeds the year 9999.");
+    }
+
     struct tm t;
 #ifdef _MSC_VER
     if (gmtime_s(&t, &time) != 0)