From 9bb900e834ba915f2a2f3abbfc4b5ef3828236d6 Mon Sep 17 00:00:00 2001
From: "Jordan Maples [MSFT]" <49793787+JordanMaples@users.noreply.github.com>
Date: Mon, 3 Feb 2020 13:46:18 -0800
Subject: [PATCH] Update include/gsl/span

Co-Authored-By: Casey Carter <cartec69@gmail.com>
---
 include/gsl/span | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/gsl/span b/include/gsl/span
index 1483762..e96d644 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -475,7 +475,7 @@ public:
         typename details::calculate_subspan_type<ElementType, Extent, Offset, Count>::type
     {
         Expects((size() >= Offset) &&
-                (Count == dynamic_extent || (Offset + Count <= size())));
+                (Count == dynamic_extent || (Count <= size() - Offset)));
 
         return {data() + Offset, Count == dynamic_extent ? size() - Offset : Count};
     }