[FIXED] Panic on ConsumerInfo when empty reponse and errors are retur…

…ned (#1426)

Signed-off-by: Piotr Piotrowski <[email protected]>

jetstream/consumer.go

@@ -77,6 +77,9 @@ func (p *pullConsumer) Info(ctx context.Context) (*ConsumerInfo, error) {
 		}
 		return nil, resp.Error
 	}
+	if resp.Error == nil && resp.ConsumerInfo == nil {
+		return nil, ErrConsumerNotFound
+	}
 
 	p.info = resp.ConsumerInfo
 	return resp.ConsumerInfo, nil
@@ -188,6 +191,9 @@ func getConsumer(ctx context.Context, js *jetStream, stream, name string) (Consu
 		}
 		return nil, resp.Error
 	}
+	if resp.Error == nil && resp.ConsumerInfo == nil {
+		return nil, ErrConsumerNotFound
+	}
 
 	cons := &pullConsumer{
 		jetStream:     js,

jetstream/ordered.go

@@ -519,6 +519,9 @@ func (c *orderedConsumer) Info(ctx context.Context) (*ConsumerInfo, error) {
 		}
 		return nil, resp.Error
 	}
+	if resp.Error == nil && resp.ConsumerInfo == nil {
+		return nil, ErrConsumerNotFound
+	}
 
 	c.currentConsumer.info = resp.ConsumerInfo
 	return resp.ConsumerInfo, nil

js.go

@@ -3223,6 +3223,9 @@ func (js *js) getConsumerInfoContext(ctx context.Context, stream, consumer strin
 		}
 		return nil, info.Error
 	}
+	if info.Error == nil && info.ConsumerInfo == nil {
+		return nil, ErrConsumerNotFound
+	}
 	return info.ConsumerInfo, nil
 }