Upgrade Autofac to latest.

Resolve #12758

framework/src/Volo.Abp.Autofac/Autofac/Extensions/DependencyInjection/AutofacRegistration.cs

@@ -94,13 +94,22 @@ public static class AutofacRegistration
             throw new ArgumentNullException(nameof(services));
         }
 
-        builder.RegisterType<AutofacServiceProvider>().As<IServiceProvider>().ExternallyOwned();
+        builder.RegisterType<AutofacServiceProvider>()
+            .As<IServiceProvider>()
+            .As<IServiceProviderIsService>()
+            .ExternallyOwned();
+
         var autofacServiceScopeFactory = typeof(AutofacServiceProvider).Assembly.GetType("Autofac.Extensions.DependencyInjection.AutofacServiceScopeFactory");
         if (autofacServiceScopeFactory == null)
         {
             throw new AbpException("Unable get type of Autofac.Extensions.DependencyInjection.AutofacServiceScopeFactory!");
         }
-        builder.RegisterType(autofacServiceScopeFactory).As<IServiceScopeFactory>();
+
+        // Issue #83: IServiceScopeFactory must be a singleton and scopes must be flat, not hierarchical.
+        builder
+            .RegisterType(autofacServiceScopeFactory)
+            .As<IServiceScopeFactory>()
+            .SingleInstance();
 
         Register(builder, services, lifetimeScopeTagForSingletons);
     }

framework/src/Volo.Abp.Autofac/Volo.Abp.Autofac.csproj

@@ -15,8 +15,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Autofac" Version="6.3.0" />
-    <PackageReference Include="Autofac.Extensions.DependencyInjection" Version="7.2.0" />
+    <PackageReference Include="Autofac" Version="6.4.0" />
+    <PackageReference Include="Autofac.Extensions.DependencyInjection" Version="8.0.0" />
     <PackageReference Include="Autofac.Extras.DynamicProxy" Version="6.0.1" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="$(MicrosoftPackageVersion)" />
     <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="$(MicrosoftPackageVersion)" />