Kim van der Riet created PROTON-1091:
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             Summary: [Python binding] AMQP null type not sent on wire 
according to AMQP specification
                 Key: PROTON-1091
                 URL: https://issues.apache.org/jira/browse/PROTON-1091
             Project: Qpid Proton
          Issue Type: Bug
          Components: python-binding
            Reporter: Kim van der Riet


When sending AMQP type null as the content of a message, the Python binding 
sends the message with no body at all, and similarly interprets a no-body AMQP 
type message as a null type. This violates the AMQP 1.0 specification on two 
counts:
* A body MUST be present and be one of three types (section 3.2);
* When sending an AMQP null type, there is an assigned AMQP type code (0x40) 
which should be used.

This causes interoperability issues with other clients. For example,  the C++ 
client can't send a null type to a python client without a failure (or _visa 
versa_).



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