RID-specific self-contained .NET Core 3 app with dependency on Microsoft.NETCore.App 2.0.0 fails to run

[dsplaisted]

Repro

Build and run the following project:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.0</TargetFramework>
    <RuntimeIdentifier>win10-x64</RuntimeIdentifier>
    <SelfContained>false</SelfContained>
  </PropertyGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.NETCore.App" Version="2.0.0" />
  </ItemGroup>
</Project>

Expected

Project runs successfully

Actual

Project fails to run with error messages such as the following:

• A fatal error was encountered. The library 'hostpolicy.dll' required to execute the application was not found in 'C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App\3.0.0-preview9.19416.11'.

• The specified framework 'Microsoft.NETCore.App', version '3.0.0-preview9-19409-16' was not found.

The output folder also includes the following files, which come from the Microsoft.NETCore.App 2.0.0 package closure:

• apphost.exe
• hostfxr.dll
• hostpolicy.dll
• System.Private.CoreLib.dll

Details

NuGet/Home#7344 would fix this. Alternatively, we could try to use conflict resolution to exclude these extra assets. That would probably require updating the platform manifest in the targeting pack.

[dsplaisted]

Test case for this bug:

        [Fact]
        public void Apphost_pack_overrides_apphost_from_package()
        {
            var testProject = new TestProject()
            {
                Name="ApphostConflict",
                TargetFrameworks = "netcoreapp3.0",
                RuntimeIdentifier = EnvironmentInfo.GetCompatibleRid(),
                IsSdkProject = true,
                IsExe = true,
                AdditionalProperties =
                {
                    ["SelfContained"] = "false"
                }
            };

            testProject.PackageReferences.Add(new TestPackageReference("Microsoft.NETCore.App", "2.0.0"));

            var testAsset = _testAssetsManager.CreateTestProject(testProject)
                .Restore(Log, testProject.Name);

            var buildCommand = new BuildCommand(Log, testAsset.TestRoot, testProject.Name);

            buildCommand.Execute()
                .Should()
                .Pass();

            var outputDirectory = buildCommand.GetOutputDirectory(testProject.TargetFrameworks, runtimeIdentifier: testProject.RuntimeIdentifier);

            var hostExecutable = $"{testProject.Name}{Constants.ExeSuffix}";
            outputDirectory.Should().OnlyHaveFiles(new[]
            {
                hostExecutable,
                $"{testProject.Name}.dll",
                $"{testProject.Name}.pdb",
                $"{testProject.Name}.deps.json",
                $"{testProject.Name}.runtimeconfig.json",
                $"{testProject.Name}.runtimeconfig.dev.json",
            });

            new DotnetCommand(Log, Path.Combine(outputDirectory.FullName, hostExecutable))
                .Execute()
                .Should()
                .Pass();
        }

[github-actions]

Due to lack of recent activity, this issue has been labeled as 'stale'. It will be closed if no further activity occurs within 30 more days. Any new comment will remove the label.