After Updating to 8.1.1 "Could not load type 'System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute'"

[Zaneo]

Describe the Bug

After updating to Autofac 8.1.1 our tests using Autofac fail with : System.TypeLoadException Could not load type 'System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute'.

Steps to Reproduce

Unfortunately I don't have a good reproduction yet.

• The project that this occurs in has a netstandard2.1 library that is being executed in a test runner on net6.0 and net8.0.
• Reference code/class that has [RequiresUnreferencedCodeAttribute]

Expected Behavior

On Autofac v8.0.0 no error occurs when resolving classes with this attribute.
On Autofac v8.1.1 the previously mentioned error occurs.

Exception with Stack Trace

System.TypeLoadException Could not load type 'System.Diagnostics.CodeAnalysis.RequiresUnreferencedCodeAttribute' from assembly 'Autofac, Version=8.1.1.0, Culture=neutral, PublicKeyToken=17863af14b0044da'.
   at System.ModuleHandle.ResolveMethod(QCallModule module, Int32 methodToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount)
   at System.ModuleHandle.ResolveMethodHandleInternal(RuntimeModule module, Int32 methodToken, ReadOnlySpan`1 typeInstantiationContext, ReadOnlySpan`1 methodInstantiationContext)
   at System.ModuleHandle.ResolveMethodHandle(Int32 methodToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext)
   at System.RuntimeType.GetMethodBase(RuntimeModule scope, Int32 typeMetadataToken)
   at System.Reflection.RuntimeCustomAttributeData..ctor(RuntimeModule scope, MetadataToken caCtorToken, ConstArray& blob)
   at System.Reflection.RuntimeCustomAttributeData.GetCustomAttributes(RuntimeModule module, Int32 tkTarget)
   at Autofac.Util.ReflectionExtensions.HasSetsRequiredMembersAttribute(ConstructorInfo constructorInfo)

Dependency Versions

Autofac: v8.1.1
Autofac.Extensions.DependencyInjection: v10.0.0

Additional Info

I'll try and create a minumum working example. However it does look like that code related to how attributes are checked changed recently.

• Optimization: Memoize RequiredMemberAttribute search #1415
• Correctly handle polyfilled required infrastructure attributes #1421

[tillig]

I don't see anything in either of the noted items that would cause the described issue. We're definitely going to need to see a repro on this one. :)

[alexanderthejaye]

Just to add I experienced this as a reflection error (same trace as above) in testing this week and luckily we discovered this amidst testing migrations between NET6 and NET8. The NET6 version had the error, the NET8 version did not. Difficult to add a repro without posting production code - I will try and dig more

[tillig]

Given we're a few months in and no one has posted a repro, I'm closing this. If you encounter the problem again, please file a new issue and include a repro. If there's no repro, we'll close it again because there's nothing we can do about this with no repro.