Unable to load Kestrel solution on Linux

[cesarblum]

Environment data

dotnet --info output:

.NET Command Line Tools (2.1.0-preview1-007026)

Product Information:
Version: 2.1.0-preview1-007026
Commit SHA-1 hash: 6164c26938

Runtime Environment:
OS Name: ubuntu
OS Version: 16.04
OS Platform: Linux
RID: ubuntu.16.04-x64
Base Path: /home/cesars/.dotnet/sdk/2.1.0-preview1-007026/

Microsoft .NET Core Shared Framework Host

Version : 2.0.0
Build : e8b8861ac7faf042c87a5c2f9f2d04c98b69f28d

VS Code version: 1.14.2
C# Extension version: 1.12.0
Mono version: 5.0.1.1

Steps to reproduce

1. Clone https://github.com/aspnet/KestrelHttpServer
2. Open VSCode

Expected behavior

Solution loads and Intellisense works, etc.

Actual behavior

All projects fail to load with the same error:

[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        The specified task executable location "/home/cesars/.vscode/extensions/ms-vscode.csharp-1.12.0/.omnisharp/omnisharp/msbuild/Roslyn/RunCsc" is invalid.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/home/cesars/src/aspnet/KestrelHttpServer/src/Kestrel.Core/Kestrel.Core.csproj'.
/home/cesars/src/aspnet/KestrelHttpServer/src/Kestrel.Core/Kestrel.Core.csproj

This is what I have under /home/cesars/.vscode/extensions/ms-vscode.csharp-1.12.0/.omnisharp/omnisharp/msbuild/Roslyn

csc.exe
csc.exe.config
csc.rsp
csi.exe
csi.exe.config
csi.rsp
Microsoft.Build.Tasks.CodeAnalysis.dll
Microsoft.CodeAnalysis.CSharp.dll
Microsoft.CodeAnalysis.CSharp.Scripting.dll
Microsoft.CodeAnalysis.dll
Microsoft.CodeAnalysis.Scripting.dll
Microsoft.CSharp.Core.targets
Microsoft.DiaSymReader.Native.amd64.dll
Microsoft.DiaSymReader.Native.x86.dll
Microsoft.Win32.Primitives.dll
System.AppContext.dll
System.Collections.Immutable.dll
System.Console.dll
System.Diagnostics.FileVersionInfo.dll
System.Diagnostics.Process.dll
System.Diagnostics.StackTrace.dll
System.IO.Compression.dll
System.IO.FileSystem.dll
System.IO.FileSystem.DriveInfo.dll
System.IO.FileSystem.Primitives.dll
System.IO.Pipes.dll
System.Reflection.Metadata.dll
System.Security.AccessControl.dll
System.Security.Claims.dll
System.Security.Cryptography.Algorithms.dll
System.Security.Cryptography.Encoding.dll
System.Security.Cryptography.Primitives.dll
System.Security.Cryptography.X509Certificates.dll
System.Security.Principal.Windows.dll
System.Text.Encoding.CodePages.dll
System.Threading.Thread.dll
System.ValueTuple.dll
System.Xml.ReaderWriter.dll
System.Xml.XmlDocument.dll
System.Xml.XPath.dll
System.Xml.XPath.XDocument.dll

[DustinCampbell]

Does the Kestrel solution set CscToolPath?

[cesarblum]

I can't find CscToolPath explicitly in the solution, but we do consume private builds of the C# compiler (aspnet/KestrelHttpServer@659fa96), which I guess would set that.

[DustinCampbell]

Yeah, that's probably the issue. I have a fix in mind for this, but am already away for the weekend and travelling. When I get some time, I'll make the fix and push a new release of C# for VS Code. In that meantime, you can roll back to a recent beta (probably 1.12-beta4) or 1.11. I'll ping back here once this is fixed (hopefully this weekend). Sound good?

[cesarblum]

Great! 👍

[DustinCampbell]

This should fix the issue: OmniSharp/omnisharp-roslyn#939