extension support problem

[seabadger]

I'm having trouble getting nested extensions to serialize correctly.

Given these definitions:

message Person {
   required int32 id = 1;
   required string name = 2;
   optional string email = 3;
   repeated int32 arr = 4;
   extensions 10 to max;
}

extend Person {
   optional int32 test  = 11;
}

I'm able to serialize an instance of Person with the 'test' field with no problems:

local p = {
   id = 3, name = "Alice",
   test = 15
}
pb.encode("Person", p)
-- and then decode, compare the results -- and all is well

HOWEVER: if the extension is instead written as below (replacing the above):

message ExtendedPerson {
  extend Person {
    optional int32 test  = 11;
  } 
}

I'm unable to serialize the message successfully (after deserialization, it comes out as nil):

-- p is same as above
pb.encode("ExtendedPerson", p)

Do I need to set up the table differently for this case? Or is this not supported?

[seabadger]

closing; apparnetly, this issue was indirectly being caused by the 'oneof' issue I filed previously; when loading a protobuf definitions file containing a type with 'oneof', any types that occur afterwards in that file are not found by the library.