Debugger won't start/launch after build fails.

Environment data

dotnet --info output: .NET Core SDK (reflecting any global.json): Version: 2.1.302 Commit: 9048955601

Runtime Environment: OS Name: Windows OS Version: 10.0.17134 OS Platform: Windows RID: win10-x64 Base Path: C:\Program Files\dotnet\sdk\2.1.302\

Host (useful for support): Version: 2.1.4 Commit: 85255dde3e

.NET Core SDKs installed: 2.0.0 [C:\Program Files\dotnet\sdk] 2.0.2 [C:\Program Files\dotnet\sdk] 2.0.3 [C:\Program Files\dotnet\sdk] 2.1.2 [C:\Program Files\dotnet\sdk] 2.1.4 [C:\Program Files\dotnet\sdk] 2.1.200 [C:\Program Files\dotnet\sdk] 2.1.202 [C:\Program Files\dotnet\sdk] 2.1.300-preview2-008533 [C:\Program Files\dotnet\sdk] 2.1.302 [C:\Program Files\dotnet\sdk] 2.1.402 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.1.0-preview2-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.0-preview2-final [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.0.3 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.0-preview2-26406-04 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.4 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download VS Code version: C# Extension version:

Steps to reproduce

1. Put some error on code. Ex. Put a syntax error.
2. Run or press F5 to debug the C# project.
3. A build error dialog pops up asking you to click on any of the following: Debug Anyway, Cancel, or Show Errors.
4. Click Cancel.
5. Correct the failing code.
6. Run or press F5 again to debug.
7. Issue: Debugger won’t launch. Does not even trigger the build.

Expected behavior

Should be able to build & debug after build errors.

Actual behavior

1. Issue: Debugger won’t launch. Not even triggering the build.

[rodrigovaras]

This is a known problem being tracked on the live share team. We are planning on releasing a workaround on the short term. The root problem is the use of a vscode debugger API that has limitations for our scenario and so cause problems when proxing a debug session and the builds fail. We have a long term solution that will resolve the root problem by using a different architecture that will be much more robust. Apologize, and as soon as we have the fix one our team members will report.

[whizkidwwe1217]

Thanks @rodrigovaras I just tested in my other machine and I can also confirm that Live Share is the main culprit.