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Console stuck in connecting to kernel upon starting spyder

See original GitHub issue

Problem Description

What steps will reproduce the problem?

Starting spyder after the latest update. Console is stuck in “connecting to kernel”

Traceback

  File "C:\Conda\envs\py36\lib\site-packages\spyder\plugins\__init__.py", line 514, in <lambda>
    toggled=lambda checked: self.toggle_view(checked),
  File "C:\Conda\envs\py36\lib\site-packages\spyder\plugins\ipythonconsole.py", line 725, in toggle_view
    self.create_new_client(give_focus=False)
  File "C:\Conda\envs\py36\lib\site-packages\spyder\plugins\ipythonconsole.py", line 1038, in create_new_client
    self.connect_client_to_kernel(client)
  File "C:\Conda\envs\py36\lib\site-packages\spyder\plugins\ipythonconsole.py", line 1073, in connect_client_to_kernel
    kc.start_channels(shell=True, iopub=True)
  File "C:\Conda\envs\py36\lib\site-packages\qtconsole\kernel_mixins.py", line 43, in start_channels
    super(QtKernelClientMixin, self).start_channels(*args, **kw)
  File "C:\Conda\envs\py36\lib\site-packages\jupyter_client\threaded.py", line 212, in start_channels
    self.shell_channel._inspect = self._check_kernel_info_reply
  File "C:\Conda\envs\py36\lib\site-packages\jupyter_client\client.py", line 143, in shell_channel
    socket, self.session, self.ioloop
  File "C:\Conda\envs\py36\lib\site-packages\jupyter_client\threaded.py", line 205, in ioloop
    self._ioloop = ioloop.IOLoop()
  File "C:\Conda\envs\py36\lib\site-packages\tornado\util.py", line 312, in __new__
    instance.initialize(*args, **init_kwargs)
  File "C:\Conda\envs\py36\lib\site-packages\zmq\eventloop\ioloop.py", line 139, in initialize
    super(ZMQIOLoop, self).initialize(impl=impl, **kwargs)
  File "C:\Conda\envs\py36\lib\site-packages\tornado\ioloop.py", line 845, in initialize
    super(PollIOLoop, self).initialize(**kwargs)
  File "C:\Conda\envs\py36\lib\site-packages\tornado\ioloop.py", line 357, in initialize
    self.make_current()
  File "C:\Conda\envs\py36\lib\site-packages\tornado\ioloop.py", line 315, in make_current
    assert asyncio is None
AssertionError

Package Versions

Spyder 3.2.7 ``
Python 3.6.4
Qt 5.10.0
PyQt5 5.10
Windows 10

Dependencies

pyflakes >=0.6.0 :  1.6.0 (OK)
pycodestyle >=2.3:  2.3.1 (OK)
pygments >=2.0   :  2.2.0 (OK)
pandas >=0.13.1  :  0.22.0 (OK)
numpy >=1.7      :  1.14.1 (OK)
sphinx >=0.6.6   :  1.7.1 (OK)
rope >=0.9.4     :  0.10.7 (OK)
jedi >=0.9.0     :  0.11.1 (OK)
nbconvert >=4.0  :  5.3.1 (OK)
sympy >=0.7.3    :  1.1.1 (OK)
cython >=0.21    :  0.27.3 (OK)
qtconsole >=4.2.0:  4.3.1 (OK)
IPython >=4.0    :  6.2.1 (OK)
pylint >=0.25    :  1.8.2 (OK)