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Schema resolution fails when the reader schema contains a union with a record (or other complex type)

Schema resolution fails when the reader schema contains a union with a record (or other complex type): a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). I'm trying to read an avro file with a reader schema that's slightly different from the writer schema (schema evolution). It…

The task

I'm trying to read an avro file with a reader_schema that's slightly different from the writer schema (schema evolution). It works fine for simple cases, but as soon as the reader schema contains a union with a complex type (a record / array / map), reading blows up with a…

Part of XiaomiMiMo/MiMo-V2.6-RL-oss.