Bug#910247: python3-netgen: importing netgen.gui fails due to MPI_Comm_size()

[Esokrates]

Package: python3-netgen
Version: 6.2.1804+dfsg1-1
Severity: important

Dear Maintainer,

When I try to import netgen.gui in python I observe the following:

user@debian:~$ ipython3
Python 3.6.7rc1 (default, Sep 27 2018, 09:51:25)
Type "copyright", "credits" or "license" for more information.

IPython 5.5.0 -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.

In [1]: import netgen.gui
/usr/lib/python3.6/importlib/_bootstrap.py:219: FutureWarning: pybind11-bound class 'netgen.libngpy._csg.SplineSurface' is using an old-style placement-new '__init__' which has been deprecated. See the upgrade guide in pybind11's docs. This message is only visible when compiled in debug mode.
return f(*args, **kwds)
/usr/lib/python3.6/importlib/_bootstrap.py:219: FutureWarning: pybind11-bound class 'netgen.libngpy._csg.CSGeometry' is using an old-style placement-new '__init__' which has been deprecated. See the upgrade guide in pybind11's docs. This message is only visible when compiled in debug mode.
return f(*args, **kwds)
/usr/lib/python3.6/importlib/_bootstrap.py:219: FutureWarning: pybind11-bound class 'netgen.libngpy._geom2d.SplineGeometry' is using an old-style placement-new '__init__' which has been deprecated. See the upgrade guide in pybind11's docs. This message is only visible when compiled in debug mode.
return f(*args, **kwds)
optfile ./ng.opt does not exist - using default values
togl-version : 2
OCC module loaded
*** The MPI_Comm_size() function was called before MPI_INIT was invoked.
*** This is disallowed by the MPI standard.
*** Your MPI job will now abort.
[debian-sid:10596] Local abort before MPI_INIT completed completed successfully, but am not able to aggregate error messages, and not able to guarantee that all other processes were killed!
user@debian:~$

Therefore I can't really make use of the package.


-- System Information:
Debian Release: buster/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.18.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-netgen depends on:
ii libc6 2.27-6
ii libgcc1 1:8.2.0-7
ii libgl1 1.1.0-1
ii libglu1-mesa [libglu1] 9.0.0-2.1
ii libmetis5 5.1.0.dfsg-5+b2
ii libnglib-6.2.1804 6.2.1804+dfsg1-1
ii libocct-data-exchange-7.3 7.3.0+dfsg1-3
ii libocct-foundation-7.3 7.3.0+dfsg1-3
ii libocct-modeling-algorithms-7.3 7.3.0+dfsg1-3
ii libocct-modeling-data-7.3 7.3.0+dfsg1-3
ii libocct-ocaf-7.3 7.3.0+dfsg1-3
ii libocct-visualization-7.3 7.3.0+dfsg1-3
ii libopenmpi3 3.1.2-5
ii libpython3.6 3.6.7~rc1-1
ii libstdc++6 8.2.0-7
ii libxmu6 2:1.1.2-2
ii python3 3.6.6-1
ii zlib1g 1:1.2.11.dfsg-1

python3-netgen recommends no packages.

python3-netgen suggests no packages.

-- no debconf information

[Drew Parsons]

Package: python3-netgen
Version: 6.2.2006+really6.2.1905+dfsg-10
Followup-For: Bug #910247

As a workaround, initialise MPI before importing netgen.gui.

> from mpi4py import MPI
> import netgen.gui