Omnisharp crashes if it can't find a .NET Framework version

[TylerLeonhardt]

Environment data

dotnet --info output:

dotnet --info
.NET Command Line Tools (2.0.0)

Product Information:
 Version:            2.0.0
 Commit SHA-1 hash:  cdcd1928c9

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.12
 OS Platform: Darwin
 RID:         osx.10.12-x64
 Base Path:   /usr/local/share/dotnet/sdk/2.0.0/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.0
  Build    : e8b8861ac7faf042c87a5c2f9f2d04c98b69f28d

VS Code version: 1.19.0-insiders
C# Extension version: 1.13.1

Steps to reproduce

1. clone this repo: http://github.com/powershell/powershelleditorservices on a mac or linux
2. open the repo in VSCode with the C# extension installed

NOTE: This repo targets multiple different versions of .NET (net451, net452, netstandard1.6)

Expected behavior

Omnisharp would do a best effort load of the projects and load them with the versions of .NET available

Actual behavior

Omnisharp crashes with the following errors:

Starting OmniSharp server at 12/22/2017, 9:59:26 AM
    Target: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/PowerShellEditorServices.sln

OmniSharp server started wth Mono
    Path: /Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/run
    PID: 28616

[info]: OmniSharp.Stdio.Host
        Starting OmniSharp on MacOS 10.12.6 (x64)
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Located 1 MSBuild instance(s)
            1: StandAlone 15.0 - "/Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        MSBUILD_EXE_PATH environment variable set to '/Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin/MSBuild.dll'
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
        Registered MSBuild instance: StandAlone 15.0 - "/Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin"
            MSBuildExtensionsPath = /Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild
            CscToolPath = /Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin/Roslyn
            CscToolExe = csc.exe
            MSBuildToolsPath = /Users/tylerleonhardt/.vscode-insiders/extensions/ms-vscode.csharp-1.13.1/.omnisharp/omnisharp/msbuild/15.0/Bin
[info]: OmniSharp.Cake.CakeProjectSystem
        Detecting Cake files in '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices'.
[info]: OmniSharp.Cake.CakeProjectSystem
        Could not find any Cake files
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Initializing in /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Auto package restore: False
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Update workspace context
[info]: OmniSharp.DotNet.DotNetProjectSystem
        Resolving projects references
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Detecting projects in '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/PowerShellEditorServices.sln'.
[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices/PowerShellEditorServices.csproj
[warn]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Microsoft.NETCore.Portable.Compatibility 1.0.3-beta-24514-00 depends on Microsoft.NETCore.Runtime.CoreCLR (>= 1.0.2-beta-24512-03) but Microsoft.NETCore.Runtime.CoreCLR 1.0.2-beta-24512-03 was not found. An approximate best match of Microsoft.NETCore.Runtime.CoreCLR 1.0.2-rc2-23818 was resolved.
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Assets file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices/obj/project.assets.json' doesn't have a target for '.NETFramework,Version=v4.5.1'. Ensure that restore has run and that you have included 'net451' in the TargetFrameworks for your project.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices/PowerShellEditorServices.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices/PowerShellEditorServices.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Host/PowerShellEditorServices.Host.csproj
[warn]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Microsoft.NETCore.Portable.Compatibility 1.0.3-beta-24514-00 depends on Microsoft.NETCore.Runtime.CoreCLR (>= 1.0.2-beta-24512-03) but Microsoft.NETCore.Runtime.CoreCLR 1.0.2-beta-24512-03 was not found. An approximate best match of Microsoft.NETCore.Runtime.CoreCLR 1.0.2-rc2-23818 was resolved.
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Assets file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Host/obj/project.assets.json' doesn't have a target for '.NETFramework,Version=v4.5.1'. Ensure that restore has run and that you have included 'net451' in the TargetFrameworks for your project.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Host/PowerShellEditorServices.Host.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Host/PowerShellEditorServices.Host.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Host/PowerShellEditorServices.Test.Host.csproj
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        The reference assemblies for framework ".NETFramework,Version=v4.5.2" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Host/PowerShellEditorServices.Test.Host.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Host/PowerShellEditorServices.Test.Host.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test/PowerShellEditorServices.Test.csproj
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        The reference assemblies for framework ".NETFramework,Version=v4.5.2" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test/PowerShellEditorServices.Test.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test/PowerShellEditorServices.Test.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Shared/PowerShellEditorServices.Test.Shared.csproj
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        The reference assemblies for framework ".NETFramework,Version=v4.5.2" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Shared/PowerShellEditorServices.Test.Shared.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Shared/PowerShellEditorServices.Test.Shared.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Protocol/PowerShellEditorServices.Protocol.csproj
[warn]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Microsoft.NETCore.Portable.Compatibility 1.0.3-beta-24514-00 depends on Microsoft.NETCore.Runtime.CoreCLR (>= 1.0.2-beta-24512-03) but Microsoft.NETCore.Runtime.CoreCLR 1.0.2-beta-24512-03 was not found. An approximate best match of Microsoft.NETCore.Runtime.CoreCLR 1.0.2-rc2-23818 was resolved.
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Assets file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Protocol/obj/project.assets.json' doesn't have a target for '.NETFramework,Version=v4.5.1'. Ensure that restore has run and that you have included 'net451' in the TargetFrameworks for your project.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Protocol/PowerShellEditorServices.Protocol.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.Protocol/PowerShellEditorServices.Protocol.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Protocol/PowerShellEditorServices.Test.Protocol.csproj
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        The reference assemblies for framework ".NETFramework,Version=v4.5.2" were not found. To resolve this, install the SDK or Targeting Pack for this framework version or retarget your application to a version of the framework for which you have the SDK or Targeting Pack installed. Note that assemblies will be resolved from the Global Assembly Cache (GAC) and will be used in place of reference assemblies. Therefore your assembly may not be correctly targeted for the framework you intend.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Protocol/PowerShellEditorServices.Test.Protocol.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Protocol/PowerShellEditorServices.Test.Protocol.csproj

[info]: OmniSharp.MSBuild.MSBuildProjectSystem
        Loading project: /Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.VSCode/PowerShellEditorServices.VSCode.csproj
[warn]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Microsoft.NETCore.Portable.Compatibility 1.0.3-beta-24514-00 depends on Microsoft.NETCore.Runtime.CoreCLR (>= 1.0.2-beta-24512-03) but Microsoft.NETCore.Runtime.CoreCLR 1.0.2-beta-24512-03 was not found. An approximate best match of Microsoft.NETCore.Runtime.CoreCLR 1.0.2-rc2-23818 was resolved.
[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Assets file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.VSCode/obj/project.assets.json' doesn't have a target for '.NETFramework,Version=v4.5.1'. Ensure that restore has run and that you have included 'net451' in the TargetFrameworks for your project.
[warn]: OmniSharp.MSBuild.MSBuildProjectSystem
        Failed to load project file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.VSCode/PowerShellEditorServices.VSCode.csproj'.
/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/src/PowerShellEditorServices.VSCode/PowerShellEditorServices.VSCode.csproj

[info]: OmniSharp.Script.ScriptProjectSystem
        Detecting CSX files in '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices'.
[info]: OmniSharp.Script.ScriptProjectSystem
        Could not find any CSX files
[info]: OmniSharp.Stdio.Host
        Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpWorkspaceOptionsProvider
[info]: OmniSharp.Stdio.Host
        Configuration finished.
[info]: OmniSharp.Stdio.Host
        Omnisharp server running using Stdio at location '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices' on host 28500.

This just means I can't use VSCode for this project on my mac because I lose out on intellisense, etc.

[TylerLeonhardt]

In the meantime, Visual Studio for Mac is working so I'm just using that but I would rather use VSCode.

[TylerLeonhardt]

Has anyone seen this?

[TylerLeonhardt]

just looking for an ack.

[DustinCampbell]

@tylerl0706: Sorry for the delay here.

For multi-TFM projects, OmniSharp simply attempts to use the first TFM in the list. So, in this case, it is trying to use net452. I believe this will be available if you have a recent version of the Mono MDK installed (http://www.mono-project.com/download/#download-mac).

[DustinCampbell]

Also, it doesn't appear that OmniSharp actually "crashed" as the issue title indicates. Instead, MSBuild failed to handle the project because the net452 TFM is unavailable on your machine.

[TylerLeonhardt]

@DustinCampbell would you recommend putting netstandard before net452?

[TylerLeonhardt]

After switching net451 and netstandard1.6, I'm seeing:

[fail]: OmniSharp.MSBuild.ProjectFile.ProjectFileInfo
        Assets file '/Users/tylerleonhardt/Desktop/CompSci/PowerShell/vscode/PowerShellEditorServices/test/PowerShellEditorServices.Test.Shared/obj/project.assets.json' doesn't have a target for '.NETStandard,Version=v1.6'. Ensure that restore has run and that you have included 'netstandard1.6' in the TargetFrameworks for your project.

which is strange because I have the dotnet sdk installed... and have netstandard mentioned in the csproj:

 <PropertyGroup>
    <VersionPrefix>0.9.0-beta</VersionPrefix>
    <TargetFrameworks>netstandard1.6;net452</TargetFrameworks>
    <AssemblyName>Microsoft.PowerShell.EditorServices.Test.Shared</AssemblyName>
 </PropertyGroup>

any thoughts?

[DustinCampbell]

maybe run dotnet restore?

[rjmholt]

I'm having this issue as well.

.NET Command Line Tools (2.0.0)

Product Information:
 Version:            2.0.0
 Commit SHA-1 hash:  cdcd1928c9

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  16.04
 OS Platform: Linux
 RID:         ubuntu.16.04-x64
 Base Path:   /home/rob/Documents/Dev/PowerShellEditorServices/.dotnet/sdk/2.0.0/

Microsoft .NET Core Shared Framework Host

  Version  : 2.0.0
  Build    : e8b8861ac7faf042c87a5c2f9f2d04c98b69f28d

I'm also working on PowerShellEditorServices, so I'm guessing it's idiosyncratic to that. I can build the project, but OmniSharp is intent on using Mono, and I don't know how to override it.

[JoeRobich]

A lot has changed with O# project loading since this issue as opened. If this is still a problem, please reopen with fresh details.