Re: [Discuss-gnuradio] possible bug with hier_block2_detail::msg_disconnect

[Johnathan Corgan]

On 09/29/2013 09:27 PM, Mark Cottrell wrote:

> I am working with gnuradio 3.7.2git-28-g639e154d and I have a
> hierarchical block with a message output that I have been using as part
> of a larger flowgraph.  Yesterday I found that whenever I call
> msg_disconnect on the top block with the hier block as the source, I get
> an error logged about it having no subscribers.  I verified this by
> printing out the subscribers in calls to message_port_sub and
> message_port_unsub.
> 
> It seems that when you call msg_connect, the call to message_port_sub is
> not made until the flowgraph has been flattened, so the subscription
> does not belong to the hier block, it belongs to the block inside the
> hier block that has the message output.  However, when you call
> msg_disconnect, it simply attempts to call message_port_unsub on on the
> hier block, which fails, as the hier block has no subscriptions.
> 
> To get around this, I simply commented out the call to
> message_port_unsub in msg_disconnect, but this isn't ideal and won't fix
> the problem in all cases.
> 
> So my question is, is this a bug? If so, is it known about, and if not
> can an issue please be raised to track it?

(Sorry for the delay in getting to this.)

This indeed sounds like a bug.  Can you create a ticket for this on the
gnuradio.org website, and attach a script that creates the error for you?

-- 
Johnathan Corgan, Corgan Labs
SDR Training and Development Services
http://corganlabs.com

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