Method with a function pointer local breaks variables view and debug console

Issue Description

When the debugger is stopped in a method that contains a local typed as a function pointer, all state related debug LSP requests seem to break.

Steps to Reproduce

1. Download repro project (MethodPointerDebugRepro.zip or do dotnet new console and paste the code below)
2. Set breakpoint on Program.cs:L10
3. Launch debug

Program.cs

using System;

namespace MethodPointerDebugRepro
{
    internal static class Program
    {
        private static unsafe void Main(string[] args)
        {
            // Set breakpoint here.
            delegate*<void> messageWriter = &WriteMessage;
            messageWriter();
        }

        private static void WriteMessage()
        {
            Console.WriteLine("testing");
        }
    }
}

MethodPointerDebugRepro.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net5.0</TargetFramework>
    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
  </PropertyGroup>

</Project>

Expected Behavior

Variables view shows locals and does not display an error. Debug console works.

Actual Behavior

Variables view shows error Error processing 'variables' request. Unknown Error: 0x80135100. Evaluating anything in the debug repl returns Internal error in the C# compiler.

Logs

OmniSharp log

Starting OmniSharp server at 9/10/2020, 8:25:57 AM
    Target: c:\MethodPointerDebugRepro

OmniSharp server started.
    Path: c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\OmniSharp.exe
    PID: 26668

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on Windows 6.2.9200.0 (x64)
[info]: OmniSharp.Services.DotNetCliService
        DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: StandAlone 16.8.0 - "c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\.msbuild\Current\Bin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        MSBUILD_EXE_PATH environment variable set to 'c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\.msbuild\Current\Bin\MSBuild.exe'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: StandAlone 16.8.0 - "c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\.msbuild\Current\Bin"
            CscToolExe = csc.exe
            CscToolPath = c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\.msbuild\Current\Bin\Roslyn
            MSBuildExtensionsPath = c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\.msbuild
            MSBuildToolsPath = c:\Users\seeminglyscience\.vscode\extensions\ms-dotnettools.csharp-1.23.2\.omnisharp\1.37.1\.msbuild\Current\Bin
[info]: OmniSharp.WorkspaceInitializer
        Project system 'OmniSharp.Cake.CakeProjectSystem' is disabled in the configuration.
[info]: OmniSharp.MSBuild.ProjectSystem
        No solution files found in 'c:\MethodPointerDebugRepro'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for 'c:\MethodPointerDebugRepro\MethodPointerDebugRepro.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in 'c:\MethodPointerDebugRepro'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: c:\MethodPointerDebugRepro\MethodPointerDebugRepro.csproj
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.Completion.CompletionOptionsProvider, Order: 0
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140
[info]: OmniSharp.WorkspaceInitializer
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location 'c:\MethodPointerDebugRepro' on host 2524.
[info]: OmniSharp.MSBuild.ProjectManager
        Successfully loaded project file 'c:\MethodPointerDebugRepro\MethodPointerDebugRepro.csproj'.
[info]: OmniSharp.MSBuild.ProjectManager
        Adding project 'c:\MethodPointerDebugRepro\MethodPointerDebugRepro.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Update project: MethodPointerDebugRepro
[info]: OmniSharp.Roslyn.CSharp.Services.Diagnostics.CSharpDiagnosticWorkerWithAnalyzers
        Solution initialized -> queue all documents for code analysis. Initial document count: 3.

C# log

(empty)

Environment information

VSCode version: 1.48.2 C# Extension: 1.23.2

Dotnet Information

.NET SDK (reflecting any global.json): Version: 5.0.100-rc.2.20459.10 Commit: 2815f3cae1

Runtime Environment: OS Name: Windows OS Version: 10.0.18362 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\5.0.100-rc.2.20459.10\

Host (useful for support): Version: 5.0.0-rc.2.20458.14 Commit: 482494f9ec

.NET SDKs installed: 1.0.4 [C:\Program Files\dotnet\sdk] 3.0.100 [C:\Program Files\dotnet\sdk] 3.1.100 [C:\Program Files\dotnet\sdk] 3.1.102 [C:\Program Files\dotnet\sdk] 3.1.300 [C:\Program Files\dotnet\sdk] 5.0.100-rc.2.20459.10 [C:\Program Files\dotnet\sdk]

.NET runtimes installed: Microsoft.AspNetCore.All 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.0-rc.2.20458.16 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 1.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 1.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.0-alpha.1.19564.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.0-rc.2.20458.14 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.WindowsDesktop.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 3.1.4 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App] Microsoft.WindowsDesktop.App 5.0.0-rc.2.20454.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

To install additional .NET runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
Align	steve8708	0.2.0
better-powershell-syntax-highlighting	justin-grote	0.0.2
bracket-pair-colorizer-2	CoenraadS	0.2.0
csharp	ms-dotnettools	1.23.2
docomment	k–kato	0.1.18
EditorConfig	EditorConfig	0.15.1
github-markdown-preview	bierner	0.0.2
gitlens	eamodio	10.2.2
keyboard-quickfix	pascalsenn	0.0.5
language-x86-64-assembly	13xforever	2.3.0
markdown-all-in-one	yzhang	3.3.0
markdown-checkbox	bierner	0.1.3
markdown-emoji	bierner	0.0.9
markdown-preview-github-styles	bierner	0.1.6
markdown-yaml-preamble	bierner	0.0.4
midl-webidl-syntax	dave-deletethis	0.0.1
msbuild-project-tools	tintoy	0.3.8
pascal	alefragnani	9.1.0
pascal-formatter	alefragnani	2.4.0
powershell	ms-vscode	2020.6.0
project-manager	alefragnani	11.3.0
reg	ionutvmi	1.0.1
roslynator	josefpihrt-vscode	3.0.0
terminal-input	SeeminglyScience	1.0.0
vim	vscodevim	1.16.0
vscode-antlr4	mike-lischke	2.2.4
vscode-cil-complete	wk-j	0.0.5
vscode-custom-snippets	NgekNgok	1.1.4
vscode-markdownlint	DavidAnson	0.36.3
vscode-pull-request-github	GitHub	0.19.0
vscode-xml	redhat	0.13.0
vscode-yaml	redhat	0.10.1
xml	DotJoshJohnson	2.5.1

[gregg-miskelly]

I have a fix. Should go in shortly.

[gregg-miskelly]

I would probably open two issues, but either way is fine.