Cannot publish core console app + core app library tests

The solution is here: https://github.com/orloffm/failingpublish

The first project is a netcoreapp2.0 exe, the second is a test netcoreapp2.0 project for it. The solution dotnet builds, but when I do

dotnet publish -c Release --self-contained -r win-x64

I get the following:

Microsoft (R) Build Engine version 15.5.179.9764 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 43.37 ms for C:\dev\failing_build\a\a.csproj.
  Restore completed in 75.49 ms for C:\dev\failing_build\a.tests\a.tests.csproj.
C:\Program Files\dotnet\sdk\2.1.3\Sdks\Microsoft.NET.Sdk\build\Microsoft.NET.RuntimeIdentifierInference.targets(116,5): error : It is not supported to build or publish a self-contained application without specifying a RuntimeIdentifier.  Please either specify a RuntimeIdentifier or set SelfContained to false. [C:\dev\failing_build\a\a.csproj]
  a -> C:\dev\failing_build\a\bin\Release\netcoreapp2.0\win-x64\a.dll
  a -> C:\dev\failing_build\a\bin\Release\netcoreapp2.0\win-x64\publish\

If I remove the test project from the solution, it works fine:

Microsoft (R) Build Engine version 15.5.179.9764 for .NET Core
Copyright (C) Microsoft Corporation. All rights reserved.

  Restore completed in 43.62 ms for C:\dev\failing_build\a\a.csproj.
  a -> C:\dev\failing_build\a\bin\Release\netcoreapp2.0\win-x64\a.dll
  a -> C:\dev\failing_build\a\bin\Release\netcoreapp2.0\win-x64\publish\

I expect it to work, as this is almost a copy of a https://github.com/dotnet/docs/tree/master/samples/core/getting-started/unit-testing-using-dotnet-test, but with the main project switched to netcoreapp2.0.

[dasMulli]

@alexzaytsev-newsroomly @orloffm sry forgot to post the workaround half a year ago:

The workaround is to change the project reference to exclude the property:

<ItemGroup>
  <ProjectReference Include="..\other\app.csproj"
                    GlobalPropertiesToRemove="SelfContained" />
</ItemGroup>

At the moment, you may also get an “was restored using 2.1.1 but … 2.1.0 … used insead” error. To work around this one, add this to the referenced(!) project(s):

<PropertyGroup>
  <TargetLatestRuntimePatch>true</TargetLatestRuntimePatch>
</PropertyGroup>

[dasMulli]

As suspected, the issue also occurs when an app references another app. selfcontainedrepro.zip also fails in the same way when the testmainapp is published with dotnet publish -r osx-x64 --self-contained.

This likely needs a change to MSBuild similar to https://github.com/Microsoft/msbuild/pull/1674 to remove the SelfContained global property for RID-agnostic P2Ps. (Or maybe for even for RID-specific ones?). cc @nguerrera @livarcocc