1 files changed, 53 insertions, 0 deletions
diff --git a/tests/src/JIT/Regression/JitBlue/GitHub_27924/GitHub_27924.cs b/tests/src/JIT/Regression/JitBlue/GitHub_27924/GitHub_27924.cs
new file mode 100644
index 0000000000..c4b8cf5be5
--- /dev/null
+++ b/tests/src/JIT/Regression/JitBlue/GitHub_27924/GitHub_27924.cs
@@ -0,0 +1,53 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Threading;
+using System.Runtime.CompilerServices;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+class Program
+{
+    static int returnVal = 100;
+    static byte[][] s = new byte[1000][];
+
+    static void Work()
+    {
+        for (uint i = 0; i < 1000000; i++)
+        {
+            var a = s[i++ % s.Length];
+
+            ref byte p = ref a[0];
+            ref byte q = ref a[1];
+
+            if (Unsafe.ByteOffset(ref p, ref q) != new IntPtr(1))
+            {
+                Console.WriteLine("ERROR: i = " + i);
+                returnVal = -1;
+            }
+            p = 1; q = 2;
+        }
+    }
+
+    static int Main(string[] args)
+    {
+        for(int i = 0; i < s.Length; i++) s[i] = new byte[2];
+
+        List<Task> tasks = new List<Task>();
+        for(int i = 0; i < 5; i++)
+        {
+            tasks.Add(Task.Run(Work));
+        }
+
+        Random r = new Random();
+        for (uint i = 0; i < 10000; i++)
+        {
+            s[r.Next(s.Length)] = new byte[3 + r.Next(100)];
+        }
+        Task t = Task.WhenAll(tasks);
+        t.Wait();
+        return returnVal;
+    }
+}