Do you have the ability to setup a simple reproducing github project so we 
can try and replicate the issue here?

On Tuesday, October 4, 2022 at 2:40:21 PM UTC-7 [email protected] wrote:

> Dear List,
>
> I desperately try to generate JAVA classes for Protocol buffers. I 
> tried protobuf-21.7, protobuf-21.6 and the latest protobuf-main but there 
> are always two classes that are faulty:
>
> com.google.protobuf.GeneratedMessageLite
>
> Line 1307:       if (instance.extensions != FieldSet.emptySet()) {
>
> Incompatible operand types 
> FieldSet<GeneratedMessageLite.ExtensionDescriptor> and 
> FieldSet<FieldSet.FieldDescriptorLite<FieldSet.FieldDescriptorLite<T>>>    
>
> and class com.google.protobuf.GeneratedMessageV3
>
> Line 1679: ? (FieldSet<FieldDescriptor>) FieldSet.emptySet()
>
> Cannot cast from 
> FieldSet<FieldSet.FieldDescriptorLite<FieldSet.FieldDescriptorLite<T>>> to 
> FieldSet<Descriptors.FieldDescriptor>
>
> Is there anyone who can solve this? I am unable to fix this. 
>
> Thank you very much for your help,
>
> Markus
>

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