quarkus: Quarkus 1.3: Smallrye AMQP not working with RabbitMQ any more, address undefined

Describe the bug I try sending a simple message with the quarkus-smallrye-reactive-messaging-amqp extension via an Emitter<String>. On the sender side, there is no indication that something went wrong. However, the rabbitmq container displays the following exception

{'v1_0.error',{symbol,<<"amqp:invalid-field">>},{utf8,<<"Attach rejected: {address_not_utf8_string,undefined}">>},undefined}

The same code works with Quarkus 1.2.1.Final.

Expected behavior

• Should work as before.
• When message cannot be sent into queue, I would expect an error. If I add an exceptionally handler to the returned CompletionStage, it is also never called.

Actual behavior Queue cannot accept message and no error is displayed.

To Reproduce Steps to reproduce the behavior:

1. Download reproducer reproducer-smallrye-amqp-emitter-not-working.zip and unzip it.
2. Run docker-compose up -d in the extracted directory.
3. Start quarkus with ./mvnw compile quarkus:dev
4. Call GET localhost:8080/hello
5. No error in quarkus console. But the error shown above is displayed in the rabbitmq container log.

Environment (please complete the following information):

• Quarkus 1.3.0.Final
• Windows 10
• RabbitMQ 3.8.3