Razorlight: NullReferenceException in RazorLight.Compilation.RoslynCompilationService.IsAssemblyDebugBuild

[stevenlauwers22]

I'm using RazorLight v2.0.0-alpha3 and I'm getting a NRE when I try to render a razor template from my unit test project.

{System.NullReferenceException: Object reference not set to an instance of an object.
   at RazorLight.Compilation.RoslynCompilationService.IsAssemblyDebugBuild(Assembly assembly)
   at RazorLight.Compilation.RoslynCompilationService..ctor(IMetadataReferenceManager referenceManager)
   at RazorLight.EngineFactory.Create(RazorLightProject project, RazorLightOptions options)
   at RazorLight.EngineFactory.ForEmbeddedResources(Type rootType)

The constructor of the RoslynCompilationService is executing this line of code:
IsAssemblyDebugBuild(OperatingAssembly);

The OperatingAssembly property returns the result from Assembly.GetEntryAssembly(), but in my case this returns null. Because of this the IsAssemblyDebugBuild method throws a NRE:
return assembly.GetCustomAttributes(false) ==> assembly == null

[toddams]

What test library do you use?

[stevenlauwers22]

xunit version 2.3.1

[campersau]

Tests can be run under a different AppDomain, that's why the exception is thrown.
You can also test this with a .NET Framework application which runs RazorLight inside a different AppDomain.

[stevenlauwers22]

@toddams any news on this?

[campersau]

@stevenlauwers22 you can try adding a xunit.runner.json file to your xunit test project with the following contents and set "Copy to output directory" to "Copy if newer".

{
  "appDomain": "denied"
}

[stevenlauwers22]

Adding the xunit.runner.json file fixes the NRE I had ... however, now I get a new NRE.

at RazorLight.Compilation.DefaultMetadataReferenceManager.Resolve(Assembly assembly) at RazorLight.Compilation.RoslynCompilationService.EnsureOptions() at RazorLight.Compilation.RoslynCompilationService.get_ParseOptions() at RazorLight.Compilation.RoslynCompilationService.CreateCompilation(String compilationContent, String assemblyName) at RazorLight.Compilation.RoslynCompilationService.CompileAndEmit(GeneratedRazorTemplate razorTemplate) at RazorLight.TemplateFactoryProvider.CreateFactory(GeneratedRazorTemplate razorTemplate) at RazorLight.TemplateFactoryProvider.<CreateFactoryAsync>d__4.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at RazorLight.RazorLightEngine.<CompileTemplateAsync>d__10.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw() at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at RazorLight.RazorLightEngine.<CompileRenderAsync>d__9.MoveNext()

The following line in the DefaultMetadataReferenceManager.Resolve method returns null:
var dependencyContext = DependencyContext.Load(assembly);

The NRE occurs on the following line (since dependencyContext == null):
var references = dependencyContext.CompileLibraries.SelectMany(library => library.ResolveReferencePaths());

[stevenlauwers22]

Here are some bugs related to this:

• https://github.com/dotnet/core-setup/issues/1017
• https://github.com/Microsoft/vstest/issues/649

[toddams]

CSharp DefaultMetadataReferenceManager.Resolve()

This error is fixed in #159, so considering this issue solved

[zagros]

@toddams - we are getting this same error with .net 4.6.2. Your sandbox uses Dependency Injection 2.0.0.0 but the version 2.0.3 or higher have the error which you seem to have fixed in #159 (669cb741998b6248d7ccfa3f9da2d25acdeaa2f8)

Our project is awaiting your Beta2 release. Can you please provide an ETA?

[mattwhetton]

Any news on this?