Error that causes the "xonsh" kernel to crash (whereas the "xonsh_kernel" kernel times out, doesn't give output, doesn't crash)

jup_xonsh_stderr.log

[I 19:36:00.116 NotebookApp] Serving notebooks from local directory: /home/louis/Path/To/Notebooks
[I 19:36:00.117 NotebookApp] 0 active kernels 
[I 19:36:00.117 NotebookApp] The IPython Notebook is running at: http://localhost:8888/
[I 19:36:00.117 NotebookApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[I 19:36:09.537 NotebookApp] Kernel started: 7e43c496-d209-4473-8bab-9f6d323b7ab0
[I 19:36:17.624 NotebookApp] Kernel shutdown: 7e43c496-d209-4473-8bab-9f6d323b7ab0
[I 19:36:17.658 NotebookApp] Kernel started: 25e9b6b8-af99-4279-b7d3-bd99cfe0cb4b
[W 19:36:19.636 NotebookApp] Timeout waiting for kernel_info reply from 7e43c496-d209-4473-8bab-9f6d323b7ab0
[E 19:36:19.638 NotebookApp] Error opening stream: HTTP 404: Not Found (Kernel does not exist: 7e43c496-d209-4473-8bab-9f6d323b7ab0)
NOW USING PYTHON 3 KERNEL
[W 19:37:08.692 NotebookApp] 404 GET /static/components/backbone/backbone-min.map (127.0.0.1) 34.96ms referer=http://localhost:8888/notebooks/ch1/Chapter%201.ipynb
NOW USING 'XONSH' KERNEL
[I 19:37:29.329 NotebookApp] Kernel shutdown: 25e9b6b8-af99-4279-b7d3-bd99cfe0cb4b
[I 19:37:29.384 NotebookApp] Kernel started: 99d9a3b5-85f7-4bee-9680-02429e007a1d
[W 19:37:39.403 NotebookApp] Timeout waiting for kernel_info reply from 99d9a3b5-85f7-4bee-9680-02429e007a1d
[I 19:38:09.511 NotebookApp] Saving file at /ch1/Chapter 1.ipynb
ATTEMPTED CALCULATION USING 'XONSH' KERNEL
NOW USING 'XONSH_KERNEL' KERNEL
[I 19:38:37.940 NotebookApp] Kernel shutdown: 99d9a3b5-85f7-4bee-9680-02429e007a1d
[I 19:38:37.988 NotebookApp] Kernel started: f88e7339-c0b9-45a0-b0aa-c34b112bcac4
/home/louis/anaconda3/lib/python3.5/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
[I 19:38:43.988 NotebookApp] KernelRestarter: restarting kernel (1/5)
[W 19:38:48.019 NotebookApp] Timeout waiting for kernel_info reply from f88e7339-c0b9-45a0-b0aa-c34b112bcac4
/home/louis/anaconda3/lib/python3.5/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
[I 19:38:53.008 NotebookApp] KernelRestarter: restarting kernel (1/5)
WARNING:root:kernel f88e7339-c0b9-45a0-b0aa-c34b112bcac4 restarted
/home/louis/anaconda3/lib/python3.5/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
[I 19:38:59.037 NotebookApp] KernelRestarter: restarting kernel (1/5)
WARNING:root:kernel f88e7339-c0b9-45a0-b0aa-c34b112bcac4 restarted
ATTEMPTED TO START 'XONSH_KERNEL' KERNEL AND IT DIED
/home/louis/anaconda3/lib/python3.5/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
[I 19:39:08.056 NotebookApp] KernelRestarter: restarting kernel (1/5)
WARNING:root:kernel f88e7339-c0b9-45a0-b0aa-c34b112bcac4 restarted
/home/louis/anaconda3/lib/python3.5/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
[I 19:39:14.083 NotebookApp] KernelRestarter: restarting kernel (1/5)
WARNING:root:kernel f88e7339-c0b9-45a0-b0aa-c34b112bcac4 restarted
/home/louis/anaconda3/lib/python3.5/site-packages/IPython/kernel/__init__.py:13: ShimWarning: The `IPython.kernel` package has been deprecated. You should import from ipykernel or jupyter_client instead.
  "You should import from ipykernel or jupyter_client instead.", ShimWarning)
[I 19:39:23.100 NotebookApp] KernelRestarter: restarting kernel (1/5)
WARNING:root:kernel f88e7339-c0b9-45a0-b0aa-c34b112bcac4 restarted
[I 19:39:23.480 NotebookApp] interrupted
[C 19:39:25.416 NotebookApp] received signal 2, stopping
[I 19:39:25.417 NotebookApp] Shutting down kernels
[I 19:39:26.440 NotebookApp] Kernel shutdown: f88e7339-c0b9-45a0-b0aa-c34b112bcac4
KILLED NOTEBOOK

jup_xonsh_stdout.log

Created new window in existing browser session.
NOW USING 'XONSH' KERNEL
ATTEMPTED CALCULATION USING 'XONSH' KERNEL
NOW USING 'XONSH_KERNEL' KERNEL
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/home/louis/anaconda3/lib/python3.5/runpy.py in _run_module_as_main(mod_name='xonsh_kernel', alter_argv=1)
    168         sys.argv[0] = mod_spec.origin
    169     return _run_code(code, main_globals, None,
--> 170                      "__main__", mod_spec)
        mod_spec = ModuleSpec(name='xonsh_kernel', loader=<_frozen_importlib_external.SourceFileLoader object at 0x7fc97d07d780>, origin='/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py')
    171 
    172 def run_module(mod_name, init_globals=None,

/home/louis/anaconda3/lib/python3.5/runpy.py in _run_code(code=<code object <module> at 0x7fc97b3eedb0, file "/...python3.5/site-packages/xonsh_kernel.py", line 1>, run_globals={'IPKernelApp': <class 'ipykernel.kernelapp.IPKernelApp'>, 'MetaKernel': <class 'metakernel._metakernel.MetaKernel'>, 'ProcessMetaKernel': <class 'metakernel.process_metakernel.ProcessMetaKernel'>, 'REPLWrapper': <class 'metakernel.replwrap.REPLWrapper'>, 'XonshKernel': <class '__main__.XonshKernel'>, '__builtins__': <module 'builtins' (built-in)>, '__cached__': '/home/louis/anaconda3/lib/python3.5/site-packages/__pycache__/xonsh_kernel.cpython-35.pyc', '__doc__': None, '__file__': '/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py', '__loader__': <_frozen_importlib_external.SourceFileLoader object>, ...}, init_globals=None, mod_name='__main__', mod_spec=ModuleSpec(name='xonsh_kernel', loader=<_frozen_...da3/lib/python3.5/site-packages/xonsh_kernel.py'), pkg_name='', script_name=None)
     83                        __package__ = pkg_name,
     84                        __spec__ = mod_spec)
---> 85     exec(code, run_globals)
        global exec = undefined
        code = <code object <module> at 0x7fc97b3eedb0, file "/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py", line 1>
        run_globals = {'ProcessMetaKernel': <class 'metakernel.process_metakernel.ProcessMetaKernel'>, 'XonshKernel': <class '__main__.XonshKernel'>, 'MetaKernel': <class 'metakernel._metakernel.MetaKernel'>, 'IPKernelApp': <class 'ipykernel.kernelapp.IPKernelApp'>, 'u': <function u at 0x7fc973a5c7b8>, '__builtins__': <module 'builtins' (built-in)>, 'os': <module 'os' from '/home/louis/anaconda3/lib/python3.5/os.py'>, '__name__': '__main__', '__version__': '0.2.0', '__spec__': ModuleSpec(name='xonsh_kernel', loader=<_frozen_importlib_external.SourceFileLoader object at 0x7fc97d07d780>, origin='/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py'), 'builtins': <module 'builtins' (built-in)>, '__package__': '', '__doc__': None, '__loader__': <_frozen_importlib_external.SourceFileLoader object at 0x7fc97d07d780>, 're': <module 're' from '/home/louis/anaconda3/lib/python3.5/re.py'>, 'REPLWrapper': <class 'metakernel.replwrap.REPLWrapper'>, 'completer': <module 'xonsh.completer' from '/home/louis/.local/lib/python3.5/site-packages/xonsh/completer.py'>, 'print_function': _Feature((2, 6, 0, 'alpha', 2), (3, 0, 0, 'alpha', 0), 65536), '__file__': '/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py', '__cached__': '/home/louis/anaconda3/lib/python3.5/site-packages/__pycache__/xonsh_kernel.cpython-35.pyc'}
     86     return run_globals
     87 

/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py in <module>()
     74 if __name__ == '__main__':
     75     from IPython.kernel.zmq.kernelapp import IPKernelApp
---> 76     IPKernelApp.launch_instance(kernel_class=XonshKernel)
        global IPKernelApp.launch_instance = <bound method Application.launch_instance of <class 'ipykernel.kernelapp.IPKernelApp'>>
        global kernel_class = undefined
        global XonshKernel = <class '__main__.XonshKernel'>

/home/louis/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py in launch_instance(cls=<class 'ipykernel.kernelapp.IPKernelApp'>, argv=None, **kwargs={'kernel_class': <class '__main__.XonshKernel'>})
    589         """
    590         app = cls.instance(**kwargs)
--> 591         app.initialize(argv)
        app.initialize = <bound method IPKernelApp.initialize of <ipykernel.kernelapp.IPKernelApp object at 0x7fc973a683c8>>
        argv = None
    592         app.start()
    593 

/home/louis/anaconda3/lib/python3.5/site-packages/ipykernel/kernelapp.py in initialize(self=<ipykernel.kernelapp.IPKernelApp object>, argv=None)

/home/louis/anaconda3/lib/python3.5/site-packages/traitlets/config/application.py in catch_config_error(method=<function IPKernelApp.initialize>, app=<ipykernel.kernelapp.IPKernelApp object>, *args=(None,), **kwargs={})
     73     """
     74     try:
---> 75         return method(app, *args, **kwargs)
        method = <function IPKernelApp.initialize at 0x7fc97394d598>
        app = <ipykernel.kernelapp.IPKernelApp object at 0x7fc973a683c8>
        args = (None,)
        kwargs = {}
     76     except (TraitError, ArgumentError) as e:
     77         app.print_help()

/home/louis/anaconda3/lib/python3.5/site-packages/ipykernel/kernelapp.py in initialize(self=<ipykernel.kernelapp.IPKernelApp object>, argv=None)
    380         self.init_io()
    381         self.init_signal()
--> 382         self.init_kernel()
        self.init_kernel = <bound method IPKernelApp.init_kernel of <ipykernel.kernelapp.IPKernelApp object at 0x7fc973a683c8>>
    383         # shell init steps
    384         self.init_path()

/home/louis/anaconda3/lib/python3.5/site-packages/ipykernel/kernelapp.py in init_kernel(self=<ipykernel.kernelapp.IPKernelApp object>)
    319                                 log=self.log,
    320                                 profile_dir=self.profile_dir,
--> 321                                 user_ns=self.user_ns,
        global user_ns = undefined
        self.user_ns = None
    322         )
    323         kernel.record_ports(self.ports)

/home/louis/anaconda3/lib/python3.5/site-packages/traitlets/config/configurable.py in instance(cls=<class '__main__.XonshKernel'>, *args=(), **kwargs={'iopub_socket': <zmq.sugar.socket.Socket object>, 'log': <logging.Logger object>, 'parent': <ipykernel.kernelapp.IPKernelApp object>, 'profile_dir': <IPython.core.profiledir.ProfileDir object>, 'session': <jupyter_client.session.Session object>, 'shell_streams': [<zmq.eventloop.zmqstream.ZMQStream object>, <zmq.eventloop.zmqstream.ZMQStream object>], 'stdin_socket': <zmq.sugar.socket.Socket object>, 'user_ns': None})
    378         # Create and save the instance
    379         if cls._instance is None:
--> 380             inst = cls(*args, **kwargs)
        inst = undefined
        cls = <class '__main__.XonshKernel'>
        args = ()
        kwargs = {'session': <jupyter_client.session.Session object at 0x7fc973949a90>, 'shell_streams': [<zmq.eventloop.zmqstream.ZMQStream object at 0x7fc97395cd68>, <zmq.eventloop.zmqstream.ZMQStream object at 0x7fc97395cf98>], 'stdin_socket': <zmq.sugar.socket.Socket object at 0x7fc973932a68>, 'profile_dir': <IPython.core.profiledir.ProfileDir object at 0x7fc973949fd0>, 'iopub_socket': <zmq.sugar.socket.Socket object at 0x7fc973932ac8>, 'parent': <ipykernel.kernelapp.IPKernelApp object at 0x7fc973a683c8>, 'user_ns': None, 'log': <logging.Logger object at 0x7fc973a689b0>}
    381             # Now make sure that the instance will also be returned by
    382             # parent classes' _instance attribute.

/home/louis/anaconda3/lib/python3.5/site-packages/metakernel/process_metakernel.py in __init__(self=<__main__.XonshKernel object>, **kwargs={'iopub_socket': <zmq.sugar.socket.Socket object>, 'log': <logging.Logger object>, 'parent': <ipykernel.kernelapp.IPKernelApp object>, 'profile_dir': <IPython.core.profiledir.ProfileDir object>, 'session': <jupyter_client.session.Session object>, 'shell_streams': [<zmq.eventloop.zmqstream.ZMQStream object>, <zmq.eventloop.zmqstream.ZMQStream object>], 'stdin_socket': <zmq.sugar.socket.Socket object>, 'user_ns': None})
     40         self.wrapper = None
     41         self.repr = str
---> 42         self._start()
        self._start = <bound method ProcessMetaKernel._start of <__main__.XonshKernel object at 0x7fc97395cfd0>>
     43 
     44     def _start(self):

/home/louis/anaconda3/lib/python3.5/site-packages/metakernel/process_metakernel.py in _start(self=<__main__.XonshKernel object>)
     45         if not self.wrapper is None:
     46             self.wrapper.child.terminate()
---> 47         self.wrapper = self.makeWrapper()
        self.wrapper = None
        self.makeWrapper = <bound method XonshKernel.makeWrapper of <__main__.XonshKernel object at 0x7fc97395cfd0>>
     48 
     49     def do_execute_direct(self, code):

/home/louis/anaconda3/lib/python3.5/site-packages/xonsh_kernel.py in makeWrapper(self=<__main__.XonshKernel object>)
     43         extra_init_cmd = "$PAGER='cat'"
     44         os.environ['PAGER'] = 'cat'
---> 45         self.completer = completer.Completer()
        self.completer = undefined
        global completer.Completer = <class 'xonsh.completer.Completer'>
     46         return REPLWrapper('xonsh', prompt_regex, prompt_change_cmd,
     47                            prompt_emit_cmd=prompt_emit_cmd,

/home/louis/.local/lib/python3.5/site-packages/xonsh/completer.py in __init__(self=<xonsh.completer.Completer object>)
     89         try:
     90             # FIXME this could be threaded for faster startup times
---> 91             self._load_bash_complete_funcs()
        self._load_bash_complete_funcs = <bound method Completer._load_bash_complete_funcs of <xonsh.completer.Completer object at 0x7fc978a2d780>>
     92             # or we could make this lazy
     93             self._load_bash_complete_files()

/home/louis/.local/lib/python3.5/site-packages/xonsh/completer.py in _load_bash_complete_funcs(self=<xonsh.completer.Completer object>)
    323     def _load_bash_complete_funcs(self):
    324         self.bash_complete_funcs = bcf = {}
--> 325         inp = self._source_completions()
        inp = undefined
        self._source_completions = <bound method Completer._source_completions of <xonsh.completer.Completer object at 0x7fc978a2d780>>
    326         if len(inp) == 0:
    327             return

/home/louis/.local/lib/python3.5/site-packages/xonsh/completer.py in _source_completions(self=<xonsh.completer.Completer object>)
    313     def _source_completions(self):
    314         srcs = []
--> 315         for f in builtins.__xonsh_env__.get('BASH_COMPLETIONS'):
        f = undefined
        global builtins.__xonsh_env__.get = <built-in method get of dict object at 0x7fc97b3fbc88>
    316             if os.path.isfile(f):
    317                 # We need to "Unixify" Windows paths for Bash to understand

TypeError: 'NoneType' object is not iterable
---------------------------------------------------------------------------
Serving notebooks from local directory: /home/louis/Path/To/Notebook
1 active kernels 
The IPython Notebook is running at: http://localhost:8888/
Shutdown this notebook server (y/[n])?
KILLED NOTEBOOK