Error processing 'variables' request. Unknown Error: 0x8000211d

Issue Description

When I set a breakpoint and try to watch the value of a variable I get the following message Error processing 'variables' request. Unknown Error: 0x8000211d

Steps to Reproduce

dotnet new web --no-https -n api dotnet new sln dotnet sln add api

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddSingleton(new JsonSerializerOptions()
        {
            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
            PropertyNameCaseInsensitive = true,
        });
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env, JsonSerializerOptions serializerOptions)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }

        app.UseRouting();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapGet("/", async context =>
            {
                await context.Response.WriteAsync("Hello World!");
            });

            endpoints.MapPost("deposit", async context =>
            {
                var transaction = await context.Request.ReadFromJsonAsync<Transaction>();
                await context.Response.WriteAsync($"Hello World! {transaction.Id} {transaction.Amount} {transaction.Comment}");
            });
        });
    }
}

dotnet run --project api

Set Breakpoint to see the value of transaction

curl -X POST http://localhost:5000/deposit -H "Content-Type: application/json" -d '{"Id":102,"Amount":200,"Comment":"rent"}'

Expected Behavior

Expected to see an object with this values: ‘{“Id”:102,“Amount”:200,“Comment”:“rent”}’`

Actual Behavior

The variable show this value: Error processing 'variables' request. Unknown Error: 0x8000211d

Logs

OmniSharp log

Post the output from Output-->OmniSharp log here

C# log

Post the output from Output-->C# here

Environment information

VSCode version: 1.47.2 C# Extension: 1.22.1

Mono Information

OmniSharp using global mono :6.10.0

Dotnet Information

.NET SDK (reflecting any global.json): Version: 5.0.100-preview.7.20366.6 Commit: 0684df3a5b

Runtime Environment: OS Name: Mac OS X OS Version: 10.15 OS Platform: Darwin RID: osx.10.15-x64 Base Path: /usr/local/share/dotnet/sdk/5.0.100-preview.7.20366.6/

Host (useful for support): Version: 5.0.0-preview.7.20364.11 Commit: 53976d38b1

.NET SDKs installed: 3.1.200 [/usr/local/share/dotnet/sdk] 3.1.202 [/usr/local/share/dotnet/sdk] 3.1.300 [/usr/local/share/dotnet/sdk] 3.1.301 [/usr/local/share/dotnet/sdk] 3.1.302 [/usr/local/share/dotnet/sdk] 5.0.100-preview.7.20366.6 [/usr/local/share/dotnet/sdk]

.NET runtimes installed: Microsoft.AspNetCore.App 3.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.1.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 5.0.0-preview.7.20365.19 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.16 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.17 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.18 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.19 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.20 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.4 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.1.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 5.0.0-preview.7.20364.11 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

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

Visual Studio Code Extensions

Extension	Author	Version
azure-account	ms-vscode	0.8.11
csharp	ms-dotnettools	1.22.1
file-downloader	mindaro-dev	1.0.0
github-vscode-theme	GitHub	1.1.3
gitlens	eamodio	10.2.2
mindaro	mindaro	0.1.120200723
mssql	ms-mssql	1.9.0
python	ms-python	2020.7.94776
remote-containers	ms-vscode-remote	0.128.0
sonarlint-vscode	SonarSource	1.16.0
vscode-dapr	ms-azuretools	0.2.1
vscode-docker	ms-azuretools	1.4.1
vscode-kubernetes-tools	ms-kubernetes-tools	1.2.1
vscode-postgresql	ms-ossdata	0.3.0
vscode-sanddance	msrvida	3.0.0
vscode-solution-explorer	fernandoescolar	0.3.10
vscode-sqlite	alexcvzz	0.8.2
vscode-yaml	redhat	0.9.1
vscodeintellicode	VisualStudioExptTeam	1.2.9
vsliveshare	ms-vsliveshare	1.0.2478
vsliveshare-audio	ms-vsliveshare	0.1.85

[gregg-miskelly]

@eestein Thanks. We will work with the VS for Mac team to get the fix deployed there too.

[gregg-miskelly]

This is a bug with our handling of decimal types. The issue is already fixed internally, but we haven’t pushed it to the extension yet. We were about to insert a new build that has the fix.