runtime: [BUG] ExecutionEngineException when deserializing generic [DataContract] on iOS (Realease Build, only through app store)

Description

Exception thrown when deserializing datacontract on iOS. The problem only occurs when the app has been deployed through AppStore/TestFlight.

System.ExecutionEngineException: Attempting to JIT compile method '(wrapper delegate-invoke) void <Module>:invoke_callvirt_void_Element_string (AnleggsSentralen.Checklist.Element,string)' while running in aot-only mode. See https://docs.microsoft.com/xamarin/ios/internals/limitations for more information.

   at System.Runtime.Serialization.FastInvokerBuilder.<>c__DisplayClass12_1`2[[AnleggsSentralen.Checklist.Element, AnleggsSentralen.Checklist, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[System.String, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].<CreateSetterInternal>b__1(Object& , Object )
   at System.Runtime.Serialization.ReflectionReader.ReflectionSetMemberValue(Object& , Object , DataMember )
   at System.Runtime.Serialization.ReflectionReader.ReflectionReadMember(XmlReaderDelegator , XmlObjectSerializerReadContext , ClassDataContract , Object& , Int32 , DataMember[] )
   at System.Runtime.Serialization.ReflectionXmlReader.ReflectionReadMembers(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] , ClassDataContract , Object& )
   at System.Runtime.Serialization.ReflectionReader.ReflectionReadClass(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] , ClassDataContract )
   at System.Runtime.Serialization.ReflectionXmlClassReader.ReflectionReadClass(XmlReaderDelegator , XmlObjectSerializerReadContext , XmlDictionaryString[] , XmlDictionaryString[] )
   at System.Runtime.Serialization.DataContracts.ClassDataContract.ReadXmlValue(XmlReaderDelegator , XmlObjectSerializerReadContext )
   at System.Runtime.Serialization.XmlObjectSerializerReadContext.ReadDataContractValue(DataContract , XmlReaderDelegator )
   at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator reader, String name, String ns, Type declaredType, DataContract& dataContract)
   at System.Runtime.Serialization.XmlObjectSerializerReadContext.InternalDeserialize(XmlReaderDelegator xmlReader, Type declaredType, DataContract dataContract, String name, String ns)
   at System.Runtime.Serialization.DataContractSerializer.InternalReadObject(XmlReaderDelegator , Boolean , DataContractResolver )
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObjectHandleExceptions(XmlReaderDelegator , Boolean , DataContractResolver )
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(XmlDictionaryReader )
   at System.Runtime.Serialization.XmlObjectSerializer.ReadObject(Stream )
   at AnleggsSentralen.Checklist.Checklist.Load(Stream stream)
   at AnleggsSentralen.Checklist.Checklist.LoadAsync(Stream stream)
   at AnleggsSentralen.Client.Services.ChecklistService.GetChecklistTemplateAsync(Int32 id)
   at AnleggsSentralen.App.Services.DataLake.<GetDraftAsync>d__27`1[[AnleggsSentralen.Checklist.Checklist, AnleggsSentralen.Checklist, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].MoveNext()
   at AnleggsSentralen.App.ViewModels.ChecklistViewModel.LoadChecklistFromTemplateAsync()
   at Herreruud.Framework.Mvvm.AsyncHelper.TraceExceptions(Func`1 factory, String method, String path)

Reproduction Steps

Deserialize generic datacontract on iOS in release build through AppStore/TestFlight. I am unable to reproduce locally.

Expected behavior

The datacontract should deserialize

Actual behavior

ExecutionEngine is thrown

Regression?

No response

Known Workarounds

No response

Configuration

• net7.0-ios
• ios
• AppStore
• Arm64

Other information

In the file “src/libraries/System.Private.DataContractSerialization/src/System/Runtime/Serialization/AccessorBuilder.cs”, I can find the following code, that I suspect is the problem:

// If either of the arguments to MakeGenericMethod is a valuetype, this is going to cause JITting.
 // Only JIT if dynamic code is supported.
 if (RuntimeFeature.IsDynamicCodeSupported || (!declaringType.IsValueType && !propertyType.IsValueType))
    {
        #pragma warning disable IL3050 // AOT compiling should recognize that this call is gated by RuntimeFeature.IsDynamicCodeSupported.
       var createSetterGeneric = s_createSetterInternal.MakeGenericMethod(propInfo.DeclaringType!, propInfo.PropertyType).CreateDelegate<Func<PropertyInfo, Setter>>();
        #pragma warning restore IL3050 // Calling members annotated with 'RequiresDynamicCodeAttribute' may break functionality when AOT compiling.
            return createSetterGeneric(propInfo);
        }
        else
        {
            return (ref object obj, object? val) =>
            {
                propInfo.SetValue(obj, val);
            };
        }

Also, The method itself is annotated with:

[UnconditionalSuppressMessage("ReflectionAnalysis", "IL2060:MakeGenericMethod",
            Justification = "The call to MakeGenericMethod is safe due to the fact that FastInvokerBuilder.CreateSetterInternal<T, T1> is not annotated.")]
        public static Setter CreateSetter(MemberInfo memberInfo)