NullReferenceException resulting in an unbound breakpoint in VSCode on Mac for a Blazor WebAssembly project

[mkArtakMSFT]

Hi.

Trying to debug a .NET 6 Blazor WebAssembly project in VS Code on a Mac, but the breakpoints don't bind:

Repro Steps

1. Create a Blazor WASM project:

mkdir BlazorClient

cd BlazorClient

dotnet new blazorwasm --hosted

2. Open the folder with VSCode:

cd ~/BlazorClient

code .

3. Choose BlazorClient.Server as launch project:

   Click ‘Yes’ to load missing assets:

   Choose BlazorClient.Server as launch project:

4. Set breakpoint at the line of 16 ”CurrentCount++” in Client/Pages/Counter.razor file.

5. Press F5 to start debugging.

Results

1. The website load successfully but the breakpoint was invalid. And display ‘No symbols have been loaded for this document’.

Error log

Starting OmniSharp server at 9/15/2021, 5:14:39 PM
    Target: /Users/vstester/BlazorClient/Server
OmniSharp server started.
    Path: /Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/run
    PID: 6081
[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on MacOS 10.14.4 (x64)
[info]: OmniSharp.Services.DotNetCliService
        DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: StandAlone 17.0.0 - "/Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/omnisharp/.msbuild/Current/Bin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        MSBUILD_EXE_PATH environment variable set to '/Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/omnisharp/.msbuild/Current/Bin/MSBuild.exe'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: StandAlone 17.0.0 - "/Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/omnisharp/.msbuild/Current/Bin"
            CscToolExe = csc.exe
            MSBuildToolsPath = /Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/omnisharp/.msbuild/Current/Bin
            CscToolPath = /Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/omnisharp/.msbuild/Current/Bin/Roslyn
            BypassFrameworkInstallChecks = true
            MSBuildExtensionsPath = /Users/vstester/.vscode/extensions/ms-dotnettools.csharp-1.23.15/.omnisharp/1.37.15/omnisharp/.msbuild
[info]: OmniSharp.WorkspaceInitializer
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
[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.Cake.CakeProjectSystem
        Detecting Cake files in '/Users/vstester/BlazorClient/Server'.
[info]: OmniSharp.Cake.CakeProjectSystem
        Could not find any Cake files
[info]: OmniSharp.MSBuild.ProjectSystem
        No solution files found in '/Users/vstester/BlazorClient/Server'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj'
[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/Users/vstester/BlazorClient/Server'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.WorkspaceInitializer
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location '/Users/vstester/BlazorClient/Server' on host 6053.
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj
[info]: OmniSharp.MSBuild.ProjectManager
        Successfully loaded project file '/Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj'.
[info]: OmniSharp.MSBuild.ProjectManager
        Adding project '/Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Update project: BlazorClient.Server
[info]: OmniSharp.MSBuild.ProjectManager
        Found referenced project outside root directory: /Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj
[info]: OmniSharp.MSBuild.ProjectManager
        Adding project '/Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Found referenced project outside root directory: /Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj
[info]: OmniSharp.MSBuild.ProjectManager
        Adding project '/Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj
[info]: OmniSharp.OmniSharpWorkspace
        Miscellaneous file: /Users/vstester/BlazorClient/Client/obj/Debug/net6.0/BlazorClient.Client.GlobalUsings.g.cs added to workspace
[info]: OmniSharp.MSBuild.ProjectManager
        Successfully loaded project file '/Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj'.
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj'
[info]: OmniSharp.OmniSharpWorkspace
        Miscellaneous file: /Users/vstester/BlazorClient/Client/obj/Debug/net6.0/.NETCoreApp,Version=v6.0.AssemblyAttributes.cs added to workspace
[info]: OmniSharp.OmniSharpWorkspace
        Miscellaneous file: /Users/vstester/BlazorClient/Client/obj/Debug/net6.0/BlazorClient.Client.AssemblyInfo.cs added to workspace
[info]: OmniSharp.MSBuild.ProjectManager
        Successfully loaded project file '/Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj'.
[info]: OmniSharp.OmniSharpWorkspace
        Miscellaneous file: /Users/vstester/BlazorClient/Shared/obj/Debug/net6.0/BlazorClient.Shared.GlobalUsings.g.cs added to workspace
[info]: OmniSharp.MSBuild.ProjectManager
        Loading project: /Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Client/BlazorClient.Client.csproj'
[info]: OmniSharp.MSBuild.ProjectManager
        Queue project update for '/Users/vstester/BlazorClient/Shared/BlazorClient.Shared.csproj'
[info]: OmniSharp.OmniSharpWorkspace
        Miscellaneous file: /Users/vstester/BlazorClient/Shared/obj/Debug/net6.0/.NETCoreApp,Version=v6.0.AssemblyAttributes.cs added to workspace
[info]: OmniSharp.OmniSharpWorkspace
        Miscellaneous file: /Users/vstester/BlazorClient/Shared/obj/Debug/net6.0/BlazorClient.Shared.AssemblyInfo.cs added to workspace
[info]: OmniSharp.MSBuild.ProjectManager
        Successfully loaded project file '/Users/vstester/BlazorClient/Server/BlazorClient.Server.csproj'.
[info]: OmniSharp.MSBuild.ProjectManager
        Update project: BlazorClient.Client
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk/analyzers/Microsoft.CodeAnalysis.CSharp.NetAnalyzers.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk/analyzers/Microsoft.CodeAnalysis.NetAnalyzers.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk/analyzers/ILLink.CodeFixProvider.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk/analyzers/ILLink.RoslynAnalyzer.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /Users/vstester/.nuget/packages/microsoft.aspnetcore.components.analyzers/6.0.0-rc.2.21460.4/analyzers/dotnet/cs/Microsoft.AspNetCore.Components.Analyzers.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /Users/vstester/.nuget/packages/microsoft.extensions.logging.abstractions/6.0.0-rc.2.21459.18/analyzers/dotnet/cs/Microsoft.Extensions.Logging.Generators.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/packs/Microsoft.NETCore.App.Ref/6.0.0-rc.2.21460.8/analyzers/dotnet/cs/System.Text.Json.SourceGeneration.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk.Razor/source-generators/Microsoft.AspNetCore.Razor.Internal.SourceGenerator.Transport.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk.Razor/source-generators/Microsoft.NET.Sdk.Razor.SourceGenerators.dll
[info]: OmniSharp.MSBuild.ProjectManager
        Update project: BlazorClient.Shared
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk/analyzers/Microsoft.CodeAnalysis.CSharp.NetAnalyzers.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/sdk/6.0.100-rc.2.21464.10/Sdks/Microsoft.NET.Sdk/analyzers/Microsoft.CodeAnalysis.NetAnalyzers.dll
[info]: OmniSharp.OmniSharpWorkspace
        Adding analyzer reference: /usr/local/share/dotnet/packs/Microsoft.NETCore.App.Ref/6.0.0-rc.2.21460.8/analyzers/dotnet/cs/System.Text.Json.SourceGeneration.dll
Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object
  at OmniSharp.Helpers.LocationExtensions+<>c.<GetQuickFix>b__0_2 (Microsoft.CodeAnalysis.Document document) [0x00000] in <6db3ffa1cfcb4026b9a63edbf920d1b5>:0 
  at System.Linq.Utilities+<>c__DisplayClass2_0`3[TSource,TMiddle,TResult].<CombineSelectors>b__0 (TSource x) [0x00012] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable+SelectArrayIterator`2[TSource,TResult].ToArray () [0x00012] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable.ToArray[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0001f] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at OmniSharp.Helpers.LocationExtensions.GetQuickFix (Microsoft.CodeAnalysis.Location location, OmniSharp.OmniSharpWorkspace workspace) [0x0015d] in <6db3ffa1cfcb4026b9a63edbf920d1b5>:0 
  at OmniSharp.Roslyn.CSharp.Services.Navigation.FindUsagesService+<>c__DisplayClass3_0.<Handle>b__2 (Microsoft.CodeAnalysis.Location l) [0x00000] in <6db3ffa1cfcb4026b9a63edbf920d1b5>:0 
  at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00048] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Set`1[TElement].UnionWith (System.Collections.Generic.IEnumerable`1[T] other) [0x00018] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable+DistinctIterator`1[TSource].FillSet () [0x0000b] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable+DistinctIterator`1[TSource].ToArray () [0x00000] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Buffer`1[TElement]..ctor (System.Collections.Generic.IEnumerable`1[T] source) [0x0000a] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.OrderedEnumerable`1+<GetEnumerator>d__3[TElement].MoveNext () [0x0001e] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList (Newtonsoft.Json.JsonWriter writer, System.Collections.IEnumerable values, Newtonsoft.Json.Serialization.JsonArrayContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000e1] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000d6] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008d] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000b2] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008d] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000b2] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonSerializer.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x0023a] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00000] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonConvert.SerializeObjectInternal (System.Object value, System.Type type, Newtonsoft.Json.JsonSerializer jsonSerializer) [0x00028] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonConvert.SerializeObject (System.Object value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x00007] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonConvert.SerializeObject (System.Object value) [0x00000] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at OmniSharp.Protocol.Packet.ToString () [0x00000] in <78b47a525d1f477f94ed0289049fe178>:0 
  at System.IO.TextWriter.WriteLine (System.Object value) [0x00028] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.IO.TextWriter+SyncTextWriter.WriteLine (System.Object value) [0x00000] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at (wrapper synchronized) System.IO.TextWriter+SyncTextWriter.WriteLine(object)
  at OmniSharp.Services.SharedTextWriter.ProcessWriteQueue () [0x0001d] in <78b47a525d1f477f94ed0289049fe178>:0 
  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00014] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x0002b] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ThreadHelper.ThreadStart () [0x00008] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object
  at OmniSharp.Helpers.LocationExtensions+<>c.<GetQuickFix>b__0_2 (Microsoft.CodeAnalysis.Document document) [0x00000] in <6db3ffa1cfcb4026b9a63edbf920d1b5>:0 
  at System.Linq.Utilities+<>c__DisplayClass2_0`3[TSource,TMiddle,TResult].<CombineSelectors>b__0 (TSource x) [0x00012] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable+SelectArrayIterator`2[TSource,TResult].ToArray () [0x00012] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable.ToArray[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0001f] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at OmniSharp.Helpers.LocationExtensions.GetQuickFix (Microsoft.CodeAnalysis.Location location, OmniSharp.OmniSharpWorkspace workspace) [0x0015d] in <6db3ffa1cfcb4026b9a63edbf920d1b5>:0 
  at OmniSharp.Roslyn.CSharp.Services.Navigation.FindUsagesService+<>c__DisplayClass3_0.<Handle>b__2 (Microsoft.CodeAnalysis.Location l) [0x00000] in <6db3ffa1cfcb4026b9a63edbf920d1b5>:0 
  at System.Linq.Enumerable+SelectEnumerableIterator`2[TSource,TResult].MoveNext () [0x00048] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Set`1[TElement].UnionWith (System.Collections.Generic.IEnumerable`1[T] other) [0x00018] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable+DistinctIterator`1[TSource].FillSet () [0x0000b] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Enumerable+DistinctIterator`1[TSource].ToArray () [0x00000] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.Buffer`1[TElement]..ctor (System.Collections.Generic.IEnumerable`1[T] source) [0x0000a] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at System.Linq.OrderedEnumerable`1+<GetEnumerator>d__3[TElement].MoveNext () [0x0001e] in <17e8581c65f940ca8137dd67206f5dbd>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList (Newtonsoft.Json.JsonWriter writer, System.Collections.IEnumerable values, Newtonsoft.Json.Serialization.JsonArrayContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000e1] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000d6] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008d] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000b2] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeObject (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract collectionContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x0008d] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue (Newtonsoft.Json.JsonWriter writer, System.Object value, Newtonsoft.Json.Serialization.JsonContract valueContract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerProperty) [0x000b2] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00079] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonSerializer.SerializeInternal (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x0023a] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonSerializer.Serialize (Newtonsoft.Json.JsonWriter jsonWriter, System.Object value, System.Type objectType) [0x00000] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonConvert.SerializeObjectInternal (System.Object value, System.Type type, Newtonsoft.Json.JsonSerializer jsonSerializer) [0x00028] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonConvert.SerializeObject (System.Object value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x00007] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at Newtonsoft.Json.JsonConvert.SerializeObject (System.Object value) [0x00000] in <2676a2da6edc420e890ed28aa4572ee5>:0 
  at OmniSharp.Protocol.Packet.ToString () [0x00000] in <78b47a525d1f477f94ed0289049fe178>:0 
  at System.IO.TextWriter.WriteLine (System.Object value) [0x00028] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.IO.TextWriter+SyncTextWriter.WriteLine (System.Object value) [0x00000] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at (wrapper synchronized) System.IO.TextWriter+SyncTextWriter.WriteLine(object)
  at OmniSharp.Services.SharedTextWriter.ProcessWriteQueue () [0x0001d] in <78b47a525d1f477f94ed0289049fe178>:0 
  at System.Threading.ThreadHelper.ThreadStart_Context (System.Object state) [0x00014] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ExecutionContext.RunInternal (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00071] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state, System.Boolean preserveSyncCtx) [0x00000] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ExecutionContext.Run (System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, System.Object state) [0x0002b] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 
  at System.Threading.ThreadHelper.ThreadStart () [0x00008] in <b18e5763ec3f41e68a8fe16d7f5e0bee>:0 

[TanayParikh]

Hey @filipw, is this a known issue?

[TanayParikh]

@JoeRobich do you happen to know if this is a known issue?

[JoeRobich]

Seems like this may be related https://github.com/dotnet/razor-tooling/issues/5913