JsonFormatter.Format() raises an exception when serialize the Microsoft.AspNetCore.Http.Endpoint

[askrinnik]

Steps to reproduce:

• Create the new ASP.NET Core Web API application with controllers and OpenApi
• Add the Loki logger with the following settings:

 builder.Logging.AddLoki(configure =>
{
    configure.Client = PushClient.Grpc;
    configure.Formatter = Formatter.Json;
});

• Configure the logging in the appsettings.json:

  "Logging": {
    "LogLevel": {
      "Microsoft.AspNetCore.Routing": "Information"
    }
  },

• Run the application and perform a GET request

It raises an exception:

System.AggregateException: An error occurred while writing to logger(s). (The deserialization constructor for type 'System.Runtime.CompilerServices.NullableContextAttribute' contains parameters with null names. This might happen because the parameter names have been trimmed by the linker. Consider using the source generated serializer instead. The unsupported member type is located on type 'System.Object'. Path: $.Metadata.)
 ---> System.NotSupportedException: The deserialization constructor for type 'System.Runtime.CompilerServices.NullableContextAttribute' contains parameters with null names. This might happen because the parameter names have been trimmed by the linker. Consider using the source generated serializer instead. The unsupported member type is located on type 'System.Object'. Path: $.Metadata.
 ---> System.NotSupportedException: The deserialization constructor for type 'System.Runtime.CompilerServices.NullableContextAttribute' contains parameters with null names. This might happen because the parameter names have been trimmed by the linker. Consider using the source generated serializer instead.
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException_ConstructorContainsNullParameterNames(Type declaringType)
   at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1.GetParameterInfoValues()
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo.Configure()
   at System.Text.Json.Serialization.Metadata.JsonTypeInfo.<EnsureConfigured>g__ConfigureLocked|143_0()
   at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type type, Boolean ensureConfigured, Boolean resolveIfMutable)
   at System.Text.Json.WriteStackFrame.InitializePolymorphicReEntry(Type runtimeType, JsonSerializerOptions options)
   at System.Text.Json.Serialization.JsonConverter.ResolvePolymorphicConverter(Object value, JsonTypeInfo jsonTypeInfo, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.Converters.IEnumerableDefaultConverter`2.OnWriteResume(Utf8JsonWriter writer, TCollection value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonCollectionConverter`2.OnTryWrite(Utf8JsonWriter writer, TCollection value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.GetMemberAndWriteJson(Object obj, WriteStack& state, Utf8JsonWriter writer)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryWrite(Utf8JsonWriter writer, T value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWriteAsObject(Utf8JsonWriter writer, Object value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.Converters.DictionaryOfTKeyTValueConverter`3.OnWriteResume(Utf8JsonWriter writer, TCollection value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryWrite(Utf8JsonWriter writer, TDictionary dictionary, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWriteAsObject(Utf8JsonWriter writer, Object value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.Converters.DictionaryOfTKeyTValueConverter`3.OnWriteResume(Utf8JsonWriter writer, TCollection value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonDictionaryConverter`3.OnTryWrite(Utf8JsonWriter writer, TDictionary dictionary, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   --- End of inner exception stack trace ---
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& state, NotSupportedException ex)
   at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
   at System.Text.Json.JsonSerializer.WriteCore[TValue](Utf8JsonWriter writer, TValue& value, JsonTypeInfo`1 jsonTypeInfo)
   at System.Text.Json.JsonSerializer.WriteString[TValue](TValue& value, JsonTypeInfo`1 jsonTypeInfo)
   at System.Text.Json.JsonSerializer.Serialize[TValue](TValue value, JsonSerializerOptions options)
   at LokiLoggingProvider.Formatters.JsonFormatter.Format[TState](LogEntry`1 logEntry, IExternalScopeProvider scopeProvider)
   at LokiLoggingProvider.Logger.LokiLogger.Log[TState](LogLevel logLevel, EventId eventId, TState state, Exception exception, Func`3 formatter)
   at Microsoft.Extensions.Logging.Logger.<Log>g__LoggerLog|13_0[TState](LogLevel logLevel, EventId eventId, ILogger logger, Exception exception, Func`3 formatter, List`1& exceptions, TState& state)
   --- End of inner exception stack trace ---
   at Microsoft.Extensions.Logging.Logger.ThrowLoggingError(List`1 exceptions)
   at Microsoft.Extensions.Logging.Logger.Log[TState](LogLevel logLevel, EventId eventId, TState state, Exception exception, Func`3 formatter)
   at Microsoft.Extensions.Logging.Logger`1.Microsoft.Extensions.Logging.ILogger.Log[TState](LogLevel logLevel, EventId eventId, TState state, Exception exception, Func`3 formatter)
   at Microsoft.Extensions.Logging.LoggerMessage.<>c__DisplayClass10_0`1.<Define>g__Log|0(ILogger logger, T1 arg1, Exception exception)
   at Microsoft.AspNetCore.Routing.EndpointMiddleware.Invoke(HttpContext httpContext)
   at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
   at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
   at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
   at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
   at Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddlewareImpl.Invoke(HttpContext context)

The exception is raised in the last command of the LokiLoggingProvider\Sources\LokiLoggingProvider\Formatters\JsonFormatter.cs return JsonSerializer.Serialize(logValues, this.serializerOptions); It happens because the logValues contains a logEntry.State, which was added by a command logValues.SetState(new Dictionary<string, object?>(state)); The state contains a Value with the Microsoft.AspNetCore.Http.Endpoint type. The Metadata property can't be properly serialized..

A workaround: "Microsoft.AspNetCore.Routing": "Warning",

A similar exception is raised with "Microsoft.AspNetCore.Mvc.Infrastructure": "Information"