cannot build latest master

[CyrusNajmabadi]

I get this error:

1>------ Build started: Project: Microsoft.CodeAnalysis, Configuration: Debug Any CPU ------
1>C:\Program Files\dotnet\sdk\3.0.100-preview6-012264\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets(257,7): error MSB4064: The "DesignTimeBuild" parameter is not supported by the "ResolvePackageAssets" task. Verify the parameter exists on the task, and it is a settable public instance property.
1>C:\Program Files\dotnet\sdk\3.0.100-preview6-012264\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets(234,5): error MSB4063: The "ResolvePackageAssets" task could not be initialized with its input parameters.
1>Done building project "Microsoft.CodeAnalysis.csproj" -- FAILED.
2>------ Build started: Project: Microsoft.CodeAnalysis.Workspaces, Configuration: Debug Any CPU ------
2>C:\Program Files\dotnet\sdk\3.0.100-preview6-012264\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets(257,7): error MSB4064: The "DesignTimeBuild" parameter is not supported by the "ResolvePackageAssets" task. Verify the parameter exists on the task, and it is a settable public instance property.
2>C:\Program Files\dotnet\sdk\3.0.100-preview6-012264\Sdks\Microsoft.NET.Sdk\targets\Microsoft.PackageDependencyResolution.targets(234,5): error MSB4063: The "ResolvePackageAssets" task could not be initialized with its input parameters.
2>Done building project "Microsoft.CodeAnalysis.Workspaces.csproj" -- FAILED.

I have cleaned and restored. I am on:

[CyrusNajmabadi]

Tagging @dotnet/roslyn-infrastructure @jasonmalinowski

[JoeRobich]

@CyrusNajmabadi I just pulled, cleaned, restored and built master OK. However the latest .NET Core SDK I have is 3.0.100-preview6-012105 which matches what is specified in the global.json. I am going to download the -012264 build of the SDK and give it a try to see if I can reproduce what you are seeing.

[dibarbet]

I've hit this before as well
@heejaechang had a suggestion to kill all the MSBuild tasks
taskkill /IM MSBuild.exe /F which has worked for me a couple times. Not a full resolution but it may help.

[CyrusNajmabadi]

@dibarbet Thanks, unfortunately that didn't help. I have no msbuild instances running.

@JoeRobich Where can i find that version of the .net sdk?

[JoeRobich]

@CyrusNajmabadi I was able to build with the same version of the SDK that you have installed, using the same version of VS. Did you have other versions of VS open? If so were they preview or RTM versions?

[JoeRobich]

@CyrusNajmabadi We link to it in the Building, Debugging, and Testing on Windows, but you can download it here - Windows x64 installer. Not sure if your issue is SDK related anymore.

[CyrusNajmabadi]

Did you have other versions of VS open? If so were they preview or RTM versions?

I have no other versions of VS open. I even rebooted to try to get things into a good state.

[JoeRobich]

I have cleaned

git clean -xdf or Build > Clean Solution?

[CyrusNajmabadi]

the former. Thanks!

[dibarbet]

I am now also running into the issue again, and my former fix is no longer working.

[JoeRobich]

@CyrusNajmabadi All it took was leaving VS up overnight I suppose.

[CyrusNajmabadi]

Any ideas on how to fix this. @jasonmalinowski @dotnet/roslyn-infrastructure ?

[CyrusNajmabadi]

Note: i'm also still getting this:

Error occurred while restoring NuGet packages: The operation failed as details for project Microsoft.CodeAnalysis.PooledObjects.Package could not be loaded.

[CyrusNajmabadi]

Something strange seems to be happening on build too. It seems to be trying to restore all packages every time i try to build. This takes a looong time. like 20s just to do that step.

[CyrusNajmabadi]

So what can i do about this:

?