[GitHub] [pulsar-client-go] sloan-dog opened a new issue #482: message.GetSchemaValue() panics if message.schema is nil

[GitBox <gi...@apache.org>]

sloan-dog opened a new issue #482:
URL: https://github.com/apache/pulsar-client-go/issues/482


   #### Expected behavior
   Calling message.GetSchemaValue() should handle nil pointer deref on message.schema, and return error and not panic
   
   #### Actual behavior
   Calling message.GetSchemaValue() when schema is undefined panics
   
   #### Steps to reproduce
   ```
   	consumer, err := (*ps.Client).Subscribe(apachePulsar.ConsumerOptions{
   		Topic:            topic, // some topic name
   		SubscriptionName: name, 
   		MessageChannel:   listenerChan, // a channel for incoming messages
   		Type:             apachePulsar.Shared,
   		Schema:           schema,
   	})
   	
   	func handler() {  err := msg.GetSchemaValue(val) }
   	
   	for cm := range listenerChan {
   		msg := cm.Message
   		go func() {
   			handler(msg)
   			(*consumer).Ack(msg)
   		}()
   	}
        
        ```
   handler panics, process dies
   
   #### Notes: unclear why schema is undefined, producer for topic in this test is registered with schema. Utilizing protobuf schema, which is succesfully created using NewProtoSchema
   
   #### System configuration
   **Pulsar version**: 2.7.0
   **pulsar-client-go**: v0.3.0


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