Adding a middleware throws an System.InvalidOperationException: 'Cannot add service middleware in phase....'

[rizi]

General

I'm using the latest version auf Autofac (6.3.0) (.net 6.0 on windows 10, console application)

Describe the Bug

When I add a middleware as described here https://autofac.readthedocs.io/en/latest/examples/log4net.html, I get the following exception:
System.InvalidOperationException: 'Cannot add service middleware in phase 'ResolveRequestStart' to a registration pipeline. Valid service middleware phases: [ResolveRequestStart, ScopeSelection, Decoration, Sharing, ServicePipelineEnd]'

Note: it seems no matter which phase I want to attach to, I always get the same exception.

Could you please tell me what I'm doing wrong.

Steps to Reproduce

Create a new ContainerBuilder, register a Module and within this module add the middleware, build the container, that's it.

public class Program
{
  public static void Main()
  {
    ContainerBuilder builder = new ContainerBuilder();
        
    builder.RegisterModule<AutofacCheckLifetimeMiddlewareConfigurationModule>();
        
    var container = builder.Build();
  }
}

public class AutofacCheckLifetimeMiddlewareConfigurationModule : Module
{
   protected override void AttachToComponentRegistration(IComponentRegistryBuilder componentRegistry, IComponentRegistration registration)
   {
        registration.PipelineBuilding += (_, pipeline) =>
                                         {
                                             pipeline.Use(new CheckLifetimeScopeUsageMiddelware());
                                         };
    }
}

public class CheckLifetimeScopeUsageMiddelware : IResolveMiddleware
{
    public void Execute(ResolveRequestContext context, Action<ResolveRequestContext> next)
    {
        
    }

   public PipelinePhase Phase => PipelinePhase.ResolveRequestStart;
}

Expected Behavior

I would expect that I can register my middleware and that this middleware will be executed by Autofac.

Exception with Stack Trace

   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.VerifyPhase(PipelinePhase middlewarePhase)
   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.AddStage(IResolveMiddleware stage, MiddlewareInsertionMode insertionLocation)
   at Autofac.Core.Resolving.Pipeline.ResolvePipelineBuilder.Use(IResolveMiddleware stage, MiddlewareInsertionMode insertionMode)
   at AutofacSample.AutofacCheckLifetimeMiddlewareConfigurationModule.<>c.<AttachToComponentRegistration>b__0_0(Object _, IResolvePipelineBuilder pipeline) in C:\Dev\Vie\Playground\Src\AutofacSolution\AutofacSample\AutofacCheckLifetimeMiddlewareConfigurationModule.cs:line 16
   at Autofac.Core.Registration.ComponentRegistration.BuildResolvePipeline(IComponentRegistryServices registryServices)
   at Autofac.Core.Registration.ComponentRegistryBuilder.Build()
   at Autofac.ContainerBuilder.Build(ContainerBuildOptions options)
   at AutofacSample.Program.InitAutofac() in C:\Dev\Vie\Playground\Src\AutofacSolution\AutofacSample\Program.cs:line 82
   at AutofacSample.Program.Main() in C:\Dev\Vie\Playground\Src\AutofacSolution\AutofacSample\Program.cs:line 15

Dependency Versions

Autofac:
6.3.0, no other dependencies.

[alistairjevans]

Thanks for raising this; it appears there is a bug here in the error message you are shown. The wrong list of "valid service middleware phases" is being shown in the message.

Can you check, if you set the phase of the middleware to RegistrationPipelineStart, do you still get an exception?

[rizi]

Thanks for raising this; it appears there is a bug here in the error message you are shown. The wrong list of "valid service middleware phases" is being shown in the message.

Can you check, if you set the phase of the middleware to RegistrationPipelineStart, do you still get an exception?

You are right, changing the phase to RegistrationPipelineStart works fine, thank you very much.
So the exception is just a little bit misleading as you already posted out
Br