Segmentation Fault with Python 3.8.12 REPL Tab Completion

[jusevitch]

I'm getting a segmentation fault when using Tab completion on a CyClpSimplex object in a Python 3.8.12 REPL environment. Minimal working example:

import numpy as np
from cylp.cy import CyClpSimplex

m = CyClpSimplex()
m.  # Press TAB

Output:

Segmentation fault (core dumped)

I'm using CyLP on Ubuntu 20.04 in a conda environment.

Output of pip show cylp:

Name: cylp
Version: 0.91.4
Summary: A Python interface for CLP, CBC, and CGL
Home-page: https://github.com/coin-or/cylp
Author: Mehdi Towhidi (mehdi.towhidi@gerad.ca), Dominique Orban (dominique.orban@gerad.ca)
Author-email: mehdi.towhidi@gerad.ca
License: Eclipse Public License
Location: [REDACTED]
Requires: numpy, scipy
Required-by: 

Output of conda list | grep coin-or:

coin-or-cbc               2.10.5               h9c3ff4c_6    conda-forge
coin-or-cgl               0.60.3               he7e83c3_2    conda-forge
coin-or-clp               1.17.6               h256e9bb_3    conda-forge
coin-or-osi               0.108.6              h3b589db_2    conda-forge
coin-or-utils             2.11.4               h573740c_3    conda-forge

[tkralphs]

Hmm, this would require some digging. I'm not even sue where to start, but I'll try to look into it.

[sbronson]

For me, tab completion segfaults accessing coefMatrix, so this is another way to trigger it:
python -c 'from cylp.cy import CyClpSimplex; CyClpSimplex().coefMatrix'

[tkralphs]

Thanks, this is very helpful.