Visual Studio "gold bar" pop up due to _MicrosoftSourceLinkCommonAssemblyFile

[AArnott]

While interacting with my solution, a "gold bar" will sometimes pop up across the top with this:

The project 'StreamJsonRpc' ran into a problem during the last operation: The result "" of evaluating the value "$(_MicrosoftSourceLinkCommonAssemblyFile)" of the "AssemblyFile" attribute in element is not valid. C:\Users\andarno.nuget\packages\microsoft.sourcelink.common\1.0.0\build\InitializeSourceControlInformation.targets You may need to reload the solution after fixing the problem.

[tmat]

@davkean Seems like bug in project system not loading props files correctly.

[davkean]

This is known. NuGet is writing a bunch of props/targets that we're reloading without coordination. We plan on fixing this by holding off reloading targets until restore has finished //cc @lifengl.

[davkean]

Basically being tracked by this: dotnet/project-system#4781.

[tmat]

@davkean Thanks for the pointers.

[cheenamalhotra]

Do microsoft.sourcelink.common and microsoft.sourcelink.github NuGet packages support .NET Standard 2.0?

We have been building for .NET Standard 2.0 which used to work fine, until we switched to proper multitargeted framework model. Now we're intermittently seeing below error when building for .NET Framework 4.8 using MSBuild commands:

##[error]E:\nuget\microsoft.sourcelink.common\1.0.0\build\InitializeSourceControlInformation.targets(3,81): Error MSB4022: The result "" of evaluating the value "$(_MicrosoftSourceLinkCommonAssemblyFile)" of the "AssemblyFile" attribute in element <UsingTask> is not valid.

Complete log: Build Log

After I removed using this package for .NET Standard targets, error seems suppressed, but too soon to conclude that since it's intermittent.

Just wondering why do these packages not expose a .NET Standard 2.0 compatible DLL?
Could that be the reason for this issue?