Robbie Gemmell created PROTON-833:
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             Summary: transport can emit detach frames with an invalid channel 
number after session end
                 Key: PROTON-833
                 URL: https://issues.apache.org/jira/browse/PROTON-833
             Project: Qpid Proton
          Issue Type: Bug
          Components: proton-j
    Affects Versions: 0.8
            Reporter: Robbie Gemmell


The transport can emit detach frames with an invalid channel number if a local 
link close(+detach?) call is performed (in response to a remote detach) after a 
local session close is performed.

When a session is locally closed by a client with open links on it, if the 
'broker' sends detach frames for any of those links then the application might 
then do a local close on them in response. The client transport then emits 
detach 'response' frames as a result of this, after the session end frame has 
been sent. A side effect of calling close on the session is that the channel 
number is unmapped when the end frame is sent, and the relevant variable set to 
the value -1. When the transport sends the detaches outlined above it then uses 
the -1 value, which is treated as channel 65535 when sent as the unsigned 
channel number.




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