From 042dfc9a1b8f4fc5878e00fd84658d04ccf8a0c6 Mon Sep 17 00:00:00 2001
From: Alexandr Nikitin <nikitin.alexandr.a@gmail.com>
Date: Tue, 23 Jan 2018 14:44:54 +0200
Subject: [PATCH] Add a repro from issue #2

---
 .../Issue2_TryDequeueTrueButGetNull.cs        | 34 +++++++++++++++++++
 .../MPMCQueue.NET.Tests.csproj                |  1 +
 2 files changed, 35 insertions(+)
 create mode 100644 tests/MPMCQueue.NET.Tests/FieldReports/Issue2_TryDequeueTrueButGetNull.cs

diff --git a/tests/MPMCQueue.NET.Tests/FieldReports/Issue2_TryDequeueTrueButGetNull.cs b/tests/MPMCQueue.NET.Tests/FieldReports/Issue2_TryDequeueTrueButGetNull.cs
new file mode 100644
index 0000000..8417545
--- /dev/null
+++ b/tests/MPMCQueue.NET.Tests/FieldReports/Issue2_TryDequeueTrueButGetNull.cs
@@ -0,0 +1,34 @@
+using System;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace MPMCQueue.NET.Tests.FieldReports
+{
+    public class Issue2_TryDequeueTrueButGetNull
+    {
+        static MPMCQueue queue { get; } = new MPMCQueue(2);
+        static void Enqueue()
+        {
+            while (true) { queue.TryEnqueue(1); }
+        }
+
+        static void Dequeue()
+        {
+            while (true)
+            {
+                if (queue.TryDequeue(out object t) && t == null)
+                {
+                    throw new Exception("Dequeue null");
+                }
+            }
+        }
+
+        [Fact]
+        public void Test()
+        {
+            var t1 = Task.Run(() => Enqueue());
+            var t2 = Task.Run(() => Dequeue());
+            t2.Wait(TimeSpan.FromSeconds(10));
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/MPMCQueue.NET.Tests/MPMCQueue.NET.Tests.csproj b/tests/MPMCQueue.NET.Tests/MPMCQueue.NET.Tests.csproj
index 708d8ed..35e75a5 100644
--- a/tests/MPMCQueue.NET.Tests/MPMCQueue.NET.Tests.csproj
+++ b/tests/MPMCQueue.NET.Tests/MPMCQueue.NET.Tests.csproj
@@ -60,6 +60,7 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="MultiThreadedTests.cs" />
     <Compile Include="RandomTests.cs" />
+    <Compile Include="FieldReports\Issue2_TryDequeueTrueButGetNull.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="packages.config" />