Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly Microsoft.DotNet.InternalAbstractions

I’m currently running a build on AppVeyor, with the new .NET Core 1.1. Apperently one of my test projects fail to run.

...
Finished executing task: Build
========================================
Tests
========================================
Executing task: Tests
Executing: "C:/Program Files/dotnet/dotnet.exe" test "C:/projects/auth/test/AskCody.Auth.Infrastructure.Tests/project.json" --configuration Release
Project AskCody.Auth (.NETStandard,Version=v1.6) was previously compiled. Skipping compilation.
Project AskCody.Auth.Infrastructure (.NETStandard,Version=v1.6) was previously compiled. Skipping compilation.
Project AskCody.Auth.Infrastructure.Tests (.NETCoreApp,Version=v1.1) was previously compiled. Skipping compilation.
xUnit.net .NET CLI test runner (64-bit .NET Core win81-x64)
  Discovering: AskCody.Auth.Infrastructure.Tests
  Discovered:  AskCody.Auth.Infrastructure.Tests
  Starting:    AskCody.Auth.Infrastructure.Tests
  Finished:    AskCody.Auth.Infrastructure.Tests
=== TEST EXECUTION SUMMARY ===
   AskCody.Auth.Infrastructure.Tests  Total: 7, Errors: 0, Failed: 0, Skipped: 0, Time: 1.271s
SUMMARY: Total: 1 targets, Passed: 1, Failed: 0.
Executing: "C:/Program Files/dotnet/dotnet.exe" test "C:/projects/auth/test/AskCody.Auth.Server.Tests/project.json" --configuration Release
Project AskCody.Auth (.NETStandard,Version=v1.6) was previously compiled. Skipping compilation.
Project AskCody.Auth.Infrastructure (.NETStandard,Version=v1.6) was previously compiled. Skipping compilation.
Project AskCody.Auth.Server (.NETCoreApp,Version=v1.1) was previously compiled. Skipping compilation.
Project AskCody.Auth.Server.Tests (.NETCoreApp,Version=v1.1) was previously compiled. Skipping compilation.
Cake.exe : Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.DotNet.InternalAbstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. The system cannot find 
the file specified.
At line:1 char:1
+ & "C:\projects\auth\tools\Cake\Cake.exe" "build.cake" -target="AppVey ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (Unhandled Excep...file specified.:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
   at Xunit.Runner.DotNet.Program.GetAvailableRunnerReporters()
   at Xunit.Runner.DotNet.Program.Run(String[] args)
   at Xunit.Runner.DotNet.Program.Main(String[] args)
SUMMARY: Total: 1 targets, Passed: 0, Failed: 1.
An error occurred when executing task '
Tests'.
Error: 
Cake.Core.CakeException: .NET Core CLI: Process returned an error (exit code -532462766).
   at Cake.Core.Tooling.Tool`1.ProcessExitCode(Int32 exitCode)
   at Cake.Core.Tooling.Tool`1.Run(TSettings settings, ProcessArgumentBuilder arguments, ProcessSetti
ngs processSettings, Action`1 postAction)
   at Cake.Core.Tooling.Tool`1.Run(TSettings settings, ProcessArgumentBuilder arguments)
   at Cake.Common.Tools.DotNetCore.Test.DotNetCoreTester.Test(String project, DotNetCoreTestSettings settings)
   at Cake.Common.Tools.DotNetCore.DotNetCoreAliases.DotNetCoreTest(ICakeContext context, String project, DotNetCoreTestSettings settings)
   at Submission#0.<.ctor>b__10()
   at Cake.Core.CakeTaskBuilderExtensions.<>c__DisplayClass5_0.<Does>b__0(ICakeContext context)
   at Cake.Core.ActionTask.Execute(ICakeContext context)
   at Cake.Core.DefaultExecutionStrategy.Execute(CakeTask task, ICakeContext context)
   at Cake.Core.CakeEngine.ExecuteTask(ICakeContext context, IExecutionStrategy strategy, Stopwatch stopWatch, CakeTask task, CakeReport report)
   at Cake.Core.CakeEngine.RunTarget(ICakeContext context, IExecutionStrategy strategy, String target)
   at Cake.Scripting.BuildScriptHost.RunTarget(String target)
   at Submission#0..ctor(Session session, Object& submissionResult)
   at Submission#0.<Factory>(Session session)
   at Roslyn.Scripting.CommonScriptEngine.Execute[T](String code, String path, DiagnosticBag diagnostics, Session session, Boolean isInteractive)
   at Roslyn.Scripting.Session.Execute(String code)
   at Cake.Scripting.Roslyn.Stable.DefaultRoslynScriptSession.Execute(Script script)
   at Cake.Core.Scripting.ScriptRunner.Run(IScriptHost host, FilePath scriptPath, IDictionary`2 arguments)
   at Cake.Commands.BuildCommand.Execute(CakeOptions options)
   at Cake.CakeApplication.Run(CakeOptions options)
   at Cake.Program.Main()
Command executed with exception:

The test projects have the same dependencies, so I am unsure why one of the projects fail. The exception of Could not load file or assembly 'Microsoft.DotNet.InternalAbstractions is not a dependency I have anywhere in my code base.

The build script for testing is:

Task("Tests")
	.IsDependentOn("Build")
	.Does(() => {
		foreach (var projectJson in GetFiles("./test/**/project.json"))
        {
			DotNetCoreTest(projectJson.FullPath, new DotNetCoreTestSettings
			{
				Configuration = "Release"
			});
		}
    });

I am running Cake 0.16.2.

[janhartmann]

Yes, it is actually dotnet cli:

PS C:\GitHub\auth> dotnet test "C:/GitHub/auth/test/AskCody.Auth.Server.Tests/project.json" --configuration Release
Project AskCody.Auth (.NETStandard,Version=v1.6) was previously compiled. Skipping compilation.
Project AskCody.Auth.Infrastructure (.NETStandard,Version=v1.6) was previously compiled. Skipping compilation.
Project AskCody.Auth.Server (.NETCoreApp,Version=v1.1) was previously compiled. Skipping compilation.
Project AskCody.Auth.Server.Tests (.NETCoreApp,Version=v1.1) was previously compiled. Skipping compilation.
Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.DotNet.InternalAbstractions, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'. Den angivne fil blev ikke fundet
   at Xunit.Runner.DotNet.Program.GetAvailableRunnerReporters()
   at Xunit.Runner.DotNet.Program.Run(String[] args)
   at Xunit.Runner.DotNet.Program.Main(String[] args)
SUMMARY: Total: 1 targets, Passed: 0, Failed: 1.
PS C:\GitHub\auth>

[janhartmann]

It smells like it. I’ll poke around their GitHub issues