title: What does an "Executing <Handle <TaskWakeupMethWrapper..." warning in python asyncio mean
body: <p>The message below is being printed while setting the result of an asyncio future. </p>
  
  <pre><code>Executing &lt;Handle &lt;TaskWakeupMethWrapper object at 0x7fc3435141f8&gt;(&lt;Future finis...ection.py:260&gt;) created at /media/stuff/stuff/projects/dare/dcds/dcds/common/connection.py:221&gt; took 1.723 seconds
  </code></pre>
  
  <p>I have no idea where even to start looking for the cause. But if I turn off the asyncio debug mode it crashes and shows me this.</p>
  
  <pre><code>Task was destroyed but it is pending!
  task: &lt;Task pending coro=&lt;upload.&lt;locals&gt;.upload_coro() done, defined at /media/stuff/stuff/projects/dare/dcds/dcds/__main__.py:58&gt; wait_for=&lt;Future pending cb=[&lt;TaskWakeupMethWrapper object at 0x7fdf5df01d38&gt;()]&gt; cb=[_chain_future.&lt;locals&gt;._call_set_state() at /home/elviento/anaconda3/lib/python3.6/asyncio/futures.py:414]&gt;
  </code></pre>