RyanSkraba opened a new pull request, #3765:
URL: https://github.com/apache/avro/pull/3765

   ## What is the purpose of the change
   
   When reflecting on a class with a recursive reference, make sure that the 
schemas are parsed and emitted in the correct order.
   
   Currently after #3304, schemas are defined to be emitted when they are 
completely resolved (i.e. a RECORD schema is put into the context after all its 
fields have also been completely resolved).  Unfortunately for recursive data 
where a field is the same class as a parent structure, this causes a stack 
overflow.
   
   This can be resolved by noting that the record schema is "in progress" by 
adding it to the list *before* it is fully resolved.  In order to keep the 
right order in the map in the end, it needs to be removed and re-added after 
the fields are finished resolving.
   
   ## Verifying this change
   
   *(Please pick one of the following options)*
   
   This change added tests to `TestReflect`. Current tests that check the 
schema order still pass.
   
   ## Documentation
   
   - Does this pull request introduce a new feature? **no**
   - If yes, how is the feature documented? **not applicable**
   


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