File "/usr/lib/python3.7/site-packages/electrum/util.py", line 882, in run_with_except_hook
    run_original(*args2, **kwargs2)
  File "/usr/lib/python3.7/site-packages/electrum/interface.py", line 244, in run
    socket = self.get_socket()
  File "/usr/lib/python3.7/site-packages/electrum/interface.py", line 186, in get_socket
    os.fsync(f.fileno())