Block does not stop cleanly.

[thasti]

Because of the "while True"-conditions in the run()-function, there is no clean exit when a python flow graph is stopped using the .stop() method. This leads to not freeing the TCP port and the remaining flow graph, especially when running a flow graph containing gr-gpredict-doppler from a python application and using the .start(), .stop() and .wait() flow graph methods.

It works in GNU Radio Companion because it kills flow graphs instead of stopping them, but this behaviour should be avoided.