Notebook failing to connect to kernel

[573]

Steps to reproduce:

git clone https://github.com/abingham/jupyter-elm-kernel
copy default.nix and requirements.txt there

In a nix-enabled shell run:

nix-shell -I nixpkgs=https://github.com/NixOS/nixpkgs-channels/archive/nixos-18.03.tar.gz

I had to use nixos-18.03 to overcome the requirement to upgrade to elm 0.19 (elm-make renamed to elm make which would require kernel.json edits).

Also had to use pyzmq==17.1.3 instaed of pyzmq==18.0.0 (current latest version) to overcome https://github.com/zeromq/pyzmq/issues/946 (had exact same error).

Reproducing the following error when opening the notebook after jupyter notebook:

[I 09:16:59.447 NotebookApp] Adapting to protocol v5.1 for kernel 8b6ce4f9-db58-4082-a242-8d67b7580676 /mnt/c/Users/myuser/pip-inside-nix-shell/venv/lib/python3.6/site-packages/notebook/base/zmqhandlers.py:284: RuntimeWarning: coroutine 'WebSocketHandler.get' was never awaited super(AuthenticatedZMQStreamHandler, self).get(*args, **kwargs)

[abingham]

I don't want to leave you hanging here, but I have no idea off the top of my head what's going on. And I also don't have any time to put into this right now. My guess is that the kernel needs to be updated to account for changes in zmq or something, though.