[Discuss-gnuradio] hier_block2 and message_source

[David Li]

Hi,

I have two classes A and B both derived from hier_block2. A also
contains a message_source. The intention is to connect A with B inside a
top_block:


class A(gr.hier_block2):

    def __init__(self):
  
        self._source = gr.message_source()

....

class B(gr.hier_block2):
....


I connect the message_queue (in A) with B in a top_block like:

connect(A._source, B)
run()

The subsequent run() command crashed with:

python: /usr/include/boost/shared_ptr.hpp:253: T*
boost::shared_ptr<T>::operator->() const [with T = gr_basic_block]:
Assertion `px != 0' failed.
Aborted

Did I connect the wrong components?

Thanks.

- David