python Segmentation fault: 11 when running the partition function of leidenalg about leidenalg

[vtraag]

It is unclear to me what might be the problem. Perhaps you had installed conflicting versions of igraph somehow? What combination of versions of python-igraph and leidenalg gave this problem? Apparently you didn't experience a problem for the combination python-igraph==0.10.4 + leidenalg==0.9.1. But what is the python-igraph version that gives a problem for leidenalg==0.10.1? Also, how did you install the libraries?

[GLking123]

The same issue occurs with igraph=0.9.9 and leidenalg=0.10.2.
Is my igraph version too low?

[szhorvat]

Yes.

[vtraag]

Indeed, as specified in pyproject.toml the dependency requirements are igraph >= 0.10.0,< 0.12 for leidenalg=0.10.2. Normally, you should then not be able to install igraph=0.9.9 while also installing leidenalg=0.10.2. I'm not sure how this happened, but if you upgrade igraph, it should all be fine.