Port more C# unit tests

The project files were generated automatically from a database
and the source files scrubbed and formatted.

In addition, some added tests are still failing. Issues were
created for these and exclusions added, for windows and for
non-windows.

12 files changed, 565 insertions, 0 deletions

diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/app.config b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/app.config
new file mode 100644
index 0000000000..6f7bbd9d2b
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/app.config
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.20.0" newVersion="4.0.20.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Text.Encoding" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Reflection" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/b00719.cs b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/b00719.cs
new file mode 100644
index 0000000000..e72e79a083
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/b00719.cs
@@ -0,0 +1,22 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+internal class Test
+{
+    public static int Main()
+    {
+        try { f(); return 1; }
+        catch (OverflowException) { Console.WriteLine("PASSED"); return 100; }
+        return 2;
+    }
+
+    public static void f()
+    {
+        int i = 4;
+        i = i - 10;
+        int[] a = new int[i];
+    }
+}
+
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/b00719.csproj b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/b00719.csproj
new file mode 100644
index 0000000000..957bafc2df
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b00719/b00719.csproj
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{95DFC527-4DC1-495E-97D7-E94EE1F7140D}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT	.0\UITestExtensionPackages</ReferencePath>
+    <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir>
+    <RestorePackages>true</RestorePackages>
+    <NuGetPackageImportStamp>7a9bfb7d</NuGetPackageImportStamp>
+  </PropertyGroup>
+  <!-- Default configurations to help VS understand the configurations -->
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  </PropertyGroup>
+  <ItemGroup>
+    <CodeAnalysisDependentAssemblyPaths Condition=" '$(VS100COMNTOOLS)' != '' " Include="$(VS100COMNTOOLS)..\IDE\PrivateAssemblies">
+      <Visible>False</Visible>
+    </CodeAnalysisDependentAssemblyPaths>
+  </ItemGroup>
+  <PropertyGroup>
+    <!-- Set to 'Full' if the Debug? column is marked in the spreadsheet. Leave blank otherwise. -->
+    <DebugType></DebugType>
+    <NoLogo>True</NoLogo>
+    <NoStandardLib>True</NoStandardLib>
+    <Noconfig>True</Noconfig>
+    <DefineConstants>$(DefineConstants);CORECLR</DefineConstants>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="b00719.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="$(JitPackagesConfigFileDirectory)minimal\project.json" />
+    <None Include="app.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
+  <PropertyGroup>
+    <ProjectJson>$(JitPackagesConfigFileDirectory)minimal\project.json</ProjectJson>
+    <ProjectLockJson>$(JitPackagesConfigFileDirectory)minimal\project.lock.json</ProjectLockJson>
+  </PropertyGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+  <PropertyGroup Condition=" '$(MsBuildProjectDirOverride)' != '' ">
+  </PropertyGroup> 
+</Project>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/app.config b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/app.config
new file mode 100644
index 0000000000..6f7bbd9d2b
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/app.config
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.20.0" newVersion="4.0.20.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Text.Encoding" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Reflection" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/b20785.csproj b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/b20785.csproj
new file mode 100644
index 0000000000..558ca8687a
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/b20785.csproj
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{95DFC527-4DC1-495E-97D7-E94EE1F7140D}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT	.0\UITestExtensionPackages</ReferencePath>
+    <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir>
+    <RestorePackages>true</RestorePackages>
+    <NuGetPackageImportStamp>7a9bfb7d</NuGetPackageImportStamp>
+  </PropertyGroup>
+  <!-- Default configurations to help VS understand the configurations -->
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  </PropertyGroup>
+  <ItemGroup>
+    <CodeAnalysisDependentAssemblyPaths Condition=" '$(VS100COMNTOOLS)' != '' " Include="$(VS100COMNTOOLS)..\IDE\PrivateAssemblies">
+      <Visible>False</Visible>
+    </CodeAnalysisDependentAssemblyPaths>
+  </ItemGroup>
+  <PropertyGroup>
+    <!-- Set to 'Full' if the Debug? column is marked in the spreadsheet. Leave blank otherwise. -->
+    <DebugType></DebugType>
+    <NoLogo>True</NoLogo>
+    <NoStandardLib>True</NoStandardLib>
+    <Noconfig>True</Noconfig>
+    <DefineConstants>$(DefineConstants);DESKTOP</DefineConstants>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="trep.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="$(JitPackagesConfigFileDirectory)threading+thread\project.json" />
+    <None Include="app.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
+  <PropertyGroup>
+    <ProjectJson>$(JitPackagesConfigFileDirectory)threading+thread\project.json</ProjectJson>
+    <ProjectLockJson>$(JitPackagesConfigFileDirectory)threading+thread\project.lock.json</ProjectLockJson>
+  </PropertyGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+  <PropertyGroup Condition=" '$(MsBuildProjectDirOverride)' != '' ">
+  </PropertyGroup> 
+</Project>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/trep.cs b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/trep.cs
new file mode 100644
index 0000000000..07169857d3
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b20785/trep.cs
@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Threading;
+
+internal struct Gen
+{
+    public void Target<U>()
+    {
+    }
+    public static void DelegateTest<U>()
+    {
+        ThreadStart d = new ThreadStart(new Gen().Target<U>);
+        IAsyncResult ar = d.BeginInvoke(null, null);
+        WaitHandle.WaitAll(new System.Threading.WaitHandle[] { ar.AsyncWaitHandle });
+    }
+}
+
+public class Test
+{
+    public static int Main()
+    {
+        Gen.DelegateTest<object>();
+        return 100;
+    }
+}
+
+
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/app.config b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/app.config
new file mode 100644
index 0000000000..6f7bbd9d2b
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/app.config
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.20.0" newVersion="4.0.20.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Text.Encoding" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Reflection" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/b21296.csproj b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/b21296.csproj
new file mode 100644
index 0000000000..22d0911c22
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/b21296.csproj
@@ -0,0 +1,55 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{95DFC527-4DC1-495E-97D7-E94EE1F7140D}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT	.0\UITestExtensionPackages</ReferencePath>
+    <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir>
+    <RestorePackages>true</RestorePackages>
+    <NuGetPackageImportStamp>7a9bfb7d</NuGetPackageImportStamp>
+  </PropertyGroup>
+  <!-- Default configurations to help VS understand the configurations -->
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  </PropertyGroup>
+  <ItemGroup>
+    <CodeAnalysisDependentAssemblyPaths Condition=" '$(VS100COMNTOOLS)' != '' " Include="$(VS100COMNTOOLS)..\IDE\PrivateAssemblies">
+      <Visible>False</Visible>
+    </CodeAnalysisDependentAssemblyPaths>
+  </ItemGroup>
+  <PropertyGroup>
+    <!-- Set to 'Full' if the Debug? column is marked in the spreadsheet. Leave blank otherwise. -->
+    <DebugType></DebugType>
+    <NoLogo>True</NoLogo>
+    <NoStandardLib>True</NoStandardLib>
+    <Noconfig>True</Noconfig>
+    <AllowUnsafeBlocks>True</AllowUnsafeBlocks>
+    <DefineConstants>$(DefineConstants);CORECLR</DefineConstants>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="ptr.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="$(JitPackagesConfigFileDirectory)minimal\project.json" />
+    <None Include="app.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
+  <PropertyGroup>
+    <ProjectJson>$(JitPackagesConfigFileDirectory)minimal\project.json</ProjectJson>
+    <ProjectLockJson>$(JitPackagesConfigFileDirectory)minimal\project.lock.json</ProjectLockJson>
+  </PropertyGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+  <PropertyGroup Condition=" '$(MsBuildProjectDirOverride)' != '' ">
+  </PropertyGroup> 
+</Project>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/ptr.cs b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/ptr.cs
new file mode 100644
index 0000000000..94d7a71683
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b21296/ptr.cs
@@ -0,0 +1,161 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+
+internal class CTest
+{
+    private static volatile int s_sx = 0;
+
+    private static unsafe void wstrcpy(char* dmem, char* smem, int charCount)
+    {
+        if (charCount > 0)
+        {
+            if ((((int)dmem ^ (int)smem) & 3) == 0)
+            {
+                while (((int)dmem & 3) != 0 && charCount > 0)
+                {
+                    dmem[0] = smem[0];
+                    dmem += 1;
+                    smem += 1;
+                    charCount -= 1;
+                }
+                if (charCount >= 8)
+                {
+                    charCount -= 8;
+                    do
+                    {
+                        ((uint*)dmem)[0] = ((uint*)smem)[0];
+                        ((uint*)dmem)[1] = ((uint*)smem)[1];
+                        ((uint*)dmem)[2] = ((uint*)smem)[2];
+                        ((uint*)dmem)[3] = ((uint*)smem)[3];
+                        dmem += 8;
+                        smem += 8;
+                        charCount -= 8;
+                    } while (charCount >= 0);
+                }
+                if ((charCount & 4) != 0)
+                {
+                    ((uint*)dmem)[0] = ((uint*)smem)[0];
+                    ((uint*)dmem)[1] = ((uint*)smem)[1];
+                    dmem += 4;
+                    smem += 4;
+                }
+                if ((charCount & 2) != 0)
+                {
+                    ((uint*)dmem)[0] = ((uint*)smem)[0];
+                    dmem += 2;
+                    smem += 2;
+                }
+            }
+            else
+            {
+                if (charCount >= 8)
+                {
+                    charCount -= 8;
+                    do
+                    {
+                        dmem[0] = smem[0];
+                        dmem[1] = smem[1];
+                        dmem[2] = smem[2];
+                        dmem[3] = smem[3];
+                        dmem[4] = smem[4];
+                        dmem[5] = smem[5];
+                        dmem[6] = smem[6];
+                        dmem[7] = smem[7];
+                        dmem += 8;
+                        smem += 8;
+                        charCount -= 8;
+                    }
+                    while (charCount >= 0);
+                }
+                if ((charCount & 4) != 0)
+                {
+                    dmem[0] = smem[0];
+                    dmem[1] = smem[1];
+                    dmem[2] = smem[2];
+                    dmem[3] = smem[3];
+                    dmem += 4;
+                    smem += 4;
+                }
+                if ((charCount & 2) != 0)
+                {
+                    dmem[0] = smem[0];
+                    dmem[1] = smem[1];
+                    dmem += 2;
+                    smem += 2;
+                }
+            }
+
+            if ((charCount & 1) != 0)
+            {
+                dmem[0] = smem[0];
+            }
+        }
+    }
+
+    public static unsafe String CtorCharPtr(IntPtr p)
+    {
+        char* ptr = (char*)p;
+        if (ptr >= (char*)64000)
+        {
+            try
+            {
+                char* end = ptr;
+
+
+                while (((uint)end & 3) != 0 && *end != 0)
+                    end++;
+                if (*end != 0)
+                {
+                    while ((end[0] & end[1]) != 0 || (end[0] != 0 && end[1] != 0))
+                    {
+                        end += 2;
+                    }
+                }
+                for (; *end != 0; end++)
+                    ;
+
+                int count = (int)(end - ptr);
+                String result = "abcdef";
+                fixed (char* dest = result)
+                    wstrcpy(dest, ptr, count);
+
+                for (int j = 0; j < 2000; j++)
+                {
+                    if ((j & 5) != 0)
+                        s_sx++;
+                    else if ((j & 10) == 8)
+                        s_sx--;
+
+                    s_sx = (s_sx + j) / 541;
+                }
+
+                return result;
+            }
+            catch (NullReferenceException)
+            {
+                throw new Exception();
+            }
+        }
+        else if (ptr == null)
+            return "";
+        else
+            throw new Exception();
+    }
+
+    private static unsafe String Test()
+    {
+        String s = "Hello!";
+        fixed (char* p = s)
+        {
+            return CtorCharPtr((IntPtr)p);
+        }
+    }
+
+    public static int Main()
+    {
+        System.Console.WriteLine(Test());
+        return 100;
+    }
+}
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/app.config b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/app.config
new file mode 100644
index 0000000000..6f7bbd9d2b
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/app.config
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <runtime>
+    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
+      <dependentAssembly>
+        <assemblyIdentity name="System.Runtime" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.20.0" newVersion="4.0.20.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Text.Encoding" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Threading.Tasks" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.IO" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+      <dependentAssembly>
+        <assemblyIdentity name="System.Reflection" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
+        <bindingRedirect oldVersion="0.0.0.0-4.0.10.0" newVersion="4.0.10.0" />
+      </dependentAssembly>
+    </assemblyBinding>
+  </runtime>
+</configuration>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/b31398.csproj b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/b31398.csproj
new file mode 100644
index 0000000000..85402afbe4
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/b31398.csproj
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <AssemblyName>$(MSBuildProjectName)</AssemblyName>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>{95DFC527-4DC1-495E-97D7-E94EE1F7140D}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <AppDesignerFolder>Properties</AppDesignerFolder>
+    <FileAlignment>512</FileAlignment>
+    <ProjectTypeGuids>{786C830F-07A1-408B-BD7F-6EE04809D6DB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <ReferencePath>$(ProgramFiles)\Common Files\microsoft shared\VSTT	.0\UITestExtensionPackages</ReferencePath>
+    <SolutionDir Condition="$(SolutionDir) == '' Or $(SolutionDir) == '*Undefined*'">..\..\</SolutionDir>
+    <RestorePackages>true</RestorePackages>
+    <NuGetPackageImportStamp>7a9bfb7d</NuGetPackageImportStamp>
+  </PropertyGroup>
+  <!-- Default configurations to help VS understand the configurations -->
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+  </PropertyGroup>
+  <ItemGroup>
+    <CodeAnalysisDependentAssemblyPaths Condition=" '$(VS100COMNTOOLS)' != '' " Include="$(VS100COMNTOOLS)..\IDE\PrivateAssemblies">
+      <Visible>False</Visible>
+    </CodeAnalysisDependentAssemblyPaths>
+  </ItemGroup>
+  <PropertyGroup>
+    <!-- Set to 'Full' if the Debug? column is marked in the spreadsheet. Leave blank otherwise. -->
+    <DebugType></DebugType>
+    <NoLogo>True</NoLogo>
+    <NoStandardLib>True</NoStandardLib>
+    <Noconfig>True</Noconfig>
+    <DefineConstants>$(DefineConstants);CORECLR</DefineConstants>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="cs1.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="$(JitPackagesConfigFileDirectory)minimal\project.json" />
+    <None Include="app.config" />
+  </ItemGroup>
+  <ItemGroup>
+    <Service Include="{82A7F48D-3B50-4B1E-B82E-3ADA8210C358}" />
+  </ItemGroup>
+  <PropertyGroup>
+    <ProjectJson>$(JitPackagesConfigFileDirectory)minimal\project.json</ProjectJson>
+    <ProjectLockJson>$(JitPackagesConfigFileDirectory)minimal\project.lock.json</ProjectLockJson>
+  </PropertyGroup>
+  <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
+  <PropertyGroup Condition=" '$(MsBuildProjectDirOverride)' != '' ">
+  </PropertyGroup> 
+</Project>
diff --git a/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/cs1.cs b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/cs1.cs
new file mode 100644
index 0000000000..a29f9db736
--- /dev/null
+++ b/tests/src/JIT/Regression/CLR-x86-JIT/V1.2-M02/b31398/cs1.cs
@@ -0,0 +1,28 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using System;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+internal delegate int Deleg(int i, int j, int k, int l, int m, int n);
+
+public class cs1
+{
+    public static int foo(int i, int j, int k, int l, int m, int n)
+    {
+        return i * 100;
+    }
+
+    public const System.Runtime.CompilerServices.MethodImplOptions s_enum2 = System.Runtime.CompilerServices.MethodImplOptions.NoInlining;
+
+    [System.Runtime.CompilerServices.MethodImpl(
+      System.Runtime.CompilerServices.MethodImplOptions.NoInlining)]
+    public static int Main(String[] args)
+    {
+        cs1 t = new cs1();
+
+        Console.WriteLine(t.GetType() == typeof(cs1) ? 100 : args.Length);
+        return 100;
+    }
+}