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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