From 827fafd32c9da89bd521bac9c91a0d6e37be2f1d Mon Sep 17 00:00:00 2001
From: "Jordan Maples [MSFT]" <49793787+JordanMaples@users.noreply.github.com>
Date: Mon, 3 Feb 2020 18:12:32 -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 5900da5..c480f18 100644
--- a/include/gsl/span
+++ b/include/gsl/span
@@ -182,7 +182,7 @@ namespace details
         {
             Expects(begin_ && current_ && end_);
             if (n > 0) Expects(end_ - current_ >= n);
-            if (n < 0) Expects(end_ - current_ >= -n);
+            if (n < 0) Expects(current_ - begin_ >= -n);
             current_ += n;
             return *this;
         }