From: Stephen Toub <stoub@microsoft.com>
Date: Wed, 27 Jun 2018 03:30:38 +0000 (-0400)
Subject: Fix number formatting exception with empty NumberGroupSizes array (#18221) (#18667)
X-Git-Tag: accepted/tizen/5.0/base/20181101.090356~66
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9c6b90e42840050fec597cef53ae7d88695bf678;p=platform%2Fupstream%2Fcoreclr.git

Fix number formatting exception with empty NumberGroupSizes array (#18221) (#18667)
---

diff --git a/src/mscorlib/shared/System/Number.Formatting.cs b/src/mscorlib/shared/System/Number.Formatting.cs
index 74395ab..387fe01 100644
--- a/src/mscorlib/shared/System/Number.Formatting.cs
+++ b/src/mscorlib/shared/System/Number.Formatting.cs
@@ -1974,13 +1974,14 @@ namespace System
                 if (groupDigits != null)
                 {
                     int groupSizeIndex = 0;                             // Index into the groupDigits array.
-                    int groupSizeCount = groupDigits[groupSizeIndex];   // The current total of group size.
                     int bufferSize = digPos;                            // The length of the result buffer string.
                     int groupSize = 0;                                  // The current group size.
 
                     // Find out the size of the string buffer for the result.
                     if (groupDigits.Length != 0) // You can pass in 0 length arrays
                     {
+                        int groupSizeCount = groupDigits[groupSizeIndex];   // The current total of group size.
+
                         while (digPos > groupSizeCount)
                         {
                             groupSize = groupDigits[groupSizeIndex];