bug#36463: jupyter terminal out of pty devices

[Ludovic Courtès]

Hello,

Steffen Rytter Postas <address@hidden> skribis:

> Both environments use the same command to execute, and are using `guix
> environment` to start the Jupyter notebook system:
>
> `LC_ALL=C guix environment -C -N --pure -m env.scm -- jupyter-notebook`
>
> The `env.scm` file used, is as follows:
>
>
> (define-packages '(
>     "glibc-utf8-locales"
>     "coreutils-minimal"
>     "bash"
>     "python"
>     "jupyter"
>     ))
> (use-modules (gnu packages))
> (packages->manifest (map specification->package packages))

Without ‘-C’, the Jupyter terminal is indeed working for me:

  guix environment --ad-hoc jupyter python-ipython python-ipykernel \
     bash coreutils --pure -- jupyter notebook

(Though for some reason IceCat displays white boxes instead of the
actual characters in the terminal, unless I zoom in or out.  But that’s
another problem…)

> "/gnu/store/h8l1pby3cm6b4fxsfwwr65b4d1hyh6cs-python-3.7.0/lib/python3.7/pty.py",
> line 96, in fork
>         master_fd, slave_fd = openpty()
>       File
> "/gnu/store/h8l1pby3cm6b4fxsfwwr65b4d1hyh6cs-python-3.7.0/lib/python3.7/pty.py",
> line 29, in openpty
>         master_fd, slave_name = _open_terminal()
>       File
> "/gnu/store/h8l1pby3cm6b4fxsfwwr65b4d1hyh6cs-python-3.7.0/lib/python3.7/pty.py",
> line 59, in _open_terminal
>         raise OSError('out of pty devices')
>     OSError: out of pty devices
> [W 18:56:52.377 NotebookApp] Unhandled error
>
> So it seems that there's an issue with pty devices when running these
> systems as a container.

I could reproduce the problem, and AFAICS commit
935e79af61f4d903e562362cdd828be807e15581 fixes it.

Let me know if it’s all fine now!

Thanks,
Ludo’.