Calling Asynchronous .NET JS Interop Method Synchronously from JS Produces Misleading Error Message

[daytonjallen]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Calling an asynchronous .NET JS Interop method synchronously produces an unhelpful/misleading error message.

These error messages (shown in steps to reproduce section) makes debugging the problem not very clear and seem mostly related to JSON Serialization - whereas that might not be the case.

Expected Behavior

Error message should indicate that this is an (unsupported workflow?) and warn against invoking async methods synchronously from JS or something that makes it easier to identify what the issue is.

Steps To Reproduce

Repo reproducing problem here: https://github.com/daytonjallen/JsonExceptionRepro

1. Start new blazor wasm project
2. Create async JSInvokable method from C#
3. Call the above method from JS synchronously (DotNetObjectReference.invokeMethod)

Functions executes "successfully" and produces an exception in the console:

Also the error is different if we pass parameters:

Exceptions (if any)

Without Params:

crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
      Unhandled exception rendering component: System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action Path: $.MoveNextAction.
       ---> System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action
         at System.Text.Json.Serialization.Converters.UnsupportedTypeConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Write(Utf8JsonWriter , Action , JsonSerializerOptions )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , Action& , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].GetMemberAndWriteJson(Object , WriteStack& , Utf8JsonWriter )
         at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].OnTryWrite(Utf8JsonWriter , AsyncStateMachineBox`1 , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
         Exception_EndOfInnerExceptionStack
         at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& , NotSupportedException )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCoreAsObject(Utf8JsonWriter , Object , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
         at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
         at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
      Error: System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action Path: $.MoveNextAction.
       ---> System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action
         at System.Text.Json.Serialization.Converters.UnsupportedTypeConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Write(Utf8JsonWriter , Action , JsonSerializerOptions )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , Action& , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].GetMemberAndWriteJson(Object , WriteStack& , Utf8JsonWriter )
         at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].OnTryWrite(Utf8JsonWriter , AsyncStateMachineBox`1 , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
         Exception_EndOfInnerExceptionStack
         at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& , NotSupportedException )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCoreAsObject(Utf8JsonWriter , Object , JsonSerializerOptions , WriteStack& )
         at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
         at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
         at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
          at qi (http://localhost/jsonexception/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80613)
          at Ji (http://localhost/jsonexception/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80497)
          at _Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet (https://dotnet.generated.invalid/_Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet:30:5)
          at Object.invokeDotNetFromJS (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:45224)
          at g (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:1621)
          at e.invokeMethod (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:2670)
          at window.logHelloWorld (http://localhost/jsonexception:31:41)
          at http://localhost/jsonexception/_framework/blazor.webassembly.js:1:3337
          at new Promise (<anonymous>)
          at Object.beginInvokeJSFromDotNet (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:3311)
Microsoft.JSInterop.JSException: System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action Path: $.MoveNextAction.
 ---> System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action
   at System.Text.Json.Serialization.Converters.UnsupportedTypeConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Write(Utf8JsonWriter , Action , JsonSerializerOptions )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , Action& , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].GetMemberAndWriteJson(Object , WriteStack& , Utf8JsonWriter )
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].OnTryWrite(Utf8JsonWriter , AsyncStateMachineBox`1 , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
   Exception_EndOfInnerExceptionStack
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& , NotSupportedException )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCoreAsObject(Utf8JsonWriter , Object , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
   at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
   at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
Error: System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action Path: $.MoveNextAction.
 ---> System.NotSupportedException: SerializeTypeInstanceNotSupported, System.Action
   at System.Text.Json.Serialization.Converters.UnsupportedTypeConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].Write(Utf8JsonWriter , Action , JsonSerializerOptions )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , Action& , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1[[System.Action, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].GetMemberAndWriteJson(Object , WriteStack& , Utf8JsonWriter )
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].OnTryWrite(Utf8JsonWriter , AsyncStateMachineBox`1 , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].TryWrite(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
   Exception_EndOfInnerExceptionStack
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& , NotSupportedException )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCore(Utf8JsonWriter , AsyncStateMachineBox`1& , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.Serialization.JsonConverter`1[[System.Runtime.CompilerServices.AsyncTaskMethodBuilder`1.AsyncStateMachineBox`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[JsonExceptionRepro.Pages.Index.<LogHelloWorld>d__5, JsonExceptionRepro, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].WriteCoreAsObject(Utf8JsonWriter , Object , JsonSerializerOptions , WriteStack& )
   at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
   at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
   at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
    at qi (http://localhost/jsonexception/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80613)
    at Ji (http://localhost/jsonexception/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80497)
    at _Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet (https://dotnet.generated.invalid/_Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet:30:5)
    at Object.invokeDotNetFromJS (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:45224)
    at g (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:1621)
    at e.invokeMethod (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:2670)
    at window.logHelloWorld (http://localhost/jsonexception:31:41)
    at http://localhost/jsonexception/_framework/blazor.webassembly.js:1:3337
    at new Promise (<anonymous>)
    at Object.beginInvokeJSFromDotNet (http://localhost/jsonexception/_framework/blazor.webassembly.js:1:3311)
   at Microsoft.JSInterop.JSRuntime.<InvokeAsync>d__16`1[[Microsoft.JSInterop.Infrastructure.IJSVoidResult, Microsoft.JSInterop, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60]].MoveNext()
   at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime , String , Object[] )
   at JsonExceptionRepro.Pages.Index.CallJsHello()
   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task , ComponentState )

With Params:

crit: Microsoft.AspNetCore.Components.WebAssembly.Rendering.WebAssemblyRenderer[100]
      Unhandled exception rendering component: System.NotSupportedException: ConstructorContainsNullParameterNames, System.Threading.Tasks.Task`1[System.Threading.Tasks.VoidTaskResult]
         at System.Text.Json.ThrowHelper.ThrowNotSupportedException_ConstructorContainsNullParameterNames(Type )
         at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1[[System.Threading.Tasks.Task`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].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.Serialization.Metadata.JsonTypeInfo.EnsureConfigured()
         at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type , Boolean , Boolean )
         at System.Text.Json.JsonSerializer.ResolvePolymorphicTypeInfo[Object](Object& , JsonTypeInfo , Boolean& )
         at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
         at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
         at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
      Error: System.NotSupportedException: ConstructorContainsNullParameterNames, System.Threading.Tasks.Task`1[System.Threading.Tasks.VoidTaskResult]
         at System.Text.Json.ThrowHelper.ThrowNotSupportedException_ConstructorContainsNullParameterNames(Type )
         at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1[[System.Threading.Tasks.Task`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].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.Serialization.Metadata.JsonTypeInfo.EnsureConfigured()
         at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type , Boolean , Boolean )
         at System.Text.Json.JsonSerializer.ResolvePolymorphicTypeInfo[Object](Object& , JsonTypeInfo , Boolean& )
         at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
         at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
         at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
         at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
          at qi (http://localhost/jsonexception6/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80613)
          at Ji (http://localhost/jsonexception6/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80497)
          at _Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet (https://dotnet.generated.invalid/_Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet:30:5)
          at Object.invokeDotNetFromJS (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:45224)
          at g (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:1621)
          at A.invokeMethod (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:3812)
          at window.logHelloWorld (http://localhost/jsonexception6:34:16)
          at http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:3337
          at new Promise (<anonymous>)
          at Object.beginInvokeJSFromDotNet (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:3311)
Microsoft.JSInterop.JSException: System.NotSupportedException: ConstructorContainsNullParameterNames, System.Threading.Tasks.Task`1[System.Threading.Tasks.VoidTaskResult]
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException_ConstructorContainsNullParameterNames(Type )
   at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1[[System.Threading.Tasks.Task`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].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.Serialization.Metadata.JsonTypeInfo.EnsureConfigured()
   at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type , Boolean , Boolean )
   at System.Text.Json.JsonSerializer.ResolvePolymorphicTypeInfo[Object](Object& , JsonTypeInfo , Boolean& )
   at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
   at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
   at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
Error: System.NotSupportedException: ConstructorContainsNullParameterNames, System.Threading.Tasks.Task`1[System.Threading.Tasks.VoidTaskResult]
   at System.Text.Json.ThrowHelper.ThrowNotSupportedException_ConstructorContainsNullParameterNames(Type )
   at System.Text.Json.Serialization.Metadata.ReflectionJsonTypeInfo`1[[System.Threading.Tasks.Task`1[[System.Threading.Tasks.VoidTaskResult, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]], System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].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.Serialization.Metadata.JsonTypeInfo.EnsureConfigured()
   at System.Text.Json.JsonSerializerOptions.GetTypeInfoInternal(Type , Boolean , Boolean )
   at System.Text.Json.JsonSerializer.ResolvePolymorphicTypeInfo[Object](Object& , JsonTypeInfo , Boolean& )
   at System.Text.Json.JsonSerializer.WriteCore[Object](Utf8JsonWriter , Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.WriteString[Object](Object& , JsonTypeInfo`1 )
   at System.Text.Json.JsonSerializer.Serialize[Object](Object , JsonSerializerOptions )
   at Microsoft.JSInterop.Infrastructure.DotNetDispatcher.Invoke(JSRuntime , DotNetInvocationInfo& , String )
   at Microsoft.AspNetCore.Components.WebAssembly.Services.DefaultWebAssemblyJSRuntime.InvokeDotNet(String assemblyName, String methodIdentifier, String dotNetObjectId, String argsJson)
    at qi (http://localhost/jsonexception6/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80613)
    at Ji (http://localhost/jsonexception6/_framework/dotnet.7.0.3.4p3w76z2b4.js:5:80497)
    at _Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet (https://dotnet.generated.invalid/_Microsoft_AspNetCore_Components_WebAssembly__Microsoft_AspNetCore_Components_WebAssembly_Services_DefaultWebAssemblyJSRuntime_InvokeDotNet:30:5)
    at Object.invokeDotNetFromJS (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:45224)
    at g (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:1621)
    at A.invokeMethod (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:3812)
    at window.logHelloWorld (http://localhost/jsonexception6:34:16)
    at http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:3337
    at new Promise (<anonymous>)
    at Object.beginInvokeJSFromDotNet (http://localhost/jsonexception6/_framework/blazor.webassembly.js:1:3311)
   at Microsoft.JSInterop.JSRuntime.<InvokeAsync>d__16`1[[Microsoft.JSInterop.Infrastructure.IJSVoidResult, Microsoft.JSInterop, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60]].MoveNext()
   at Microsoft.JSInterop.JSRuntimeExtensions.InvokeVoidAsync(IJSRuntime , String , Object[] )
   at Test.Pages.Index.CallJsHello()
   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)
   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task , ComponentState )

.NET Version

7.0.200

Anything else?

Visual Studio Version: 17.5.0

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.

[shiladitya-mukerji-22]

Hey @mkArtakMSFT, I would like to work on this issue.

[mkArtakMSFT]

@shiladitya-mukerji-22 I just found your message accidentally.
If you want, you can wait for us to drop a summary comment, which will hopefully give you hints regarding how to proceed and what approach to take. If you are confident that you can handle it without it, feel free to send us a PR and we'll get somebody review it.