Build is now confusing when "Enable full solution analysis" is off

[davkean]

When "Enable full solution analysis" is off, build is now very confusing:

1. Sync to dotnet/project-system@b6f9b16
2. Run build.cmd from a VS 15 command prompt
3. Open src\ProjectSystem.sln
4. Turn off Enable full solution analysis
5. In the Error List, switch to Build + IntelliSense
6. Build

Expected: Build fails, with the following Errors in the error list:

Warning RS0003  Do not directly await a Task without calling ConfigureAwait Microsoft.VisualStudio.ProjectSystem.Managed.VS C:\roslyn-project-system\src\Microsoft.VisualStudio.ProjectSystem.Managed.VS\ProjectSystem\VS\Build\LanguageServiceErrorListProvider.cs 86  Active
Error   RS0006  Attribute 'AppliesToAttribute' comes from a different version of MEF than the export attribute on 'Microsoft.VisualStudio.ProjectSystem.VS.Build.LanguageServiceErrorListProvider'  Microsoft.VisualStudio.ProjectSystem.Managed.VS C:\roslyn-project-system\src\Microsoft.VisualStudio.ProjectSystem.Managed.VS\ProjectSystem\VS\Build\LanguageServiceErrorListProvider.cs 17  Active
Warning RS0003  Do not directly await a Task without calling ConfigureAwait Microsoft.VisualStudio.ProjectSystem.Managed.VS C:\roslyn-project-system\src\Microsoft.VisualStudio.ProjectSystem.Managed.VS\ProjectSystem\VS\Build\LanguageServiceErrorListProvider.cs 86  Active

Actual: Build fails, no errors or warnings are displayed in the errorlist

If I switch to build-only, I see the above errors.

[heejaechang]

I tested this on simple solution and it worked. does both of you have latest Roslyn bits installed?

[davkean]

I'm on 1.2.1, NIck's on 1.3.

[nguerrera]

Maybe I'm not quite on 1.3. I followed the steps here: https://github.com/dotnet/roslyn-internal/tree/master/Closed/Test/Solutions/RegenerateNewtonsoftErrorLogBaseline.txt and am running devenv /rootSuffix RoslynDev. Does that give me up to date error list bits?

[nguerrera]

Can you try the solution referenced there?

[heejaechang]

this repro require dev15, so let me try nick's repro.