Segfault with completion

[videlec]

In Ipython

In [1]: import polymake
In [2]: c = polymake.cube(3)
In [3]: c.CANONICAL.<TAB>
....
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Failed to execute cysignals-CSI: Aucun fichier ou dossier de ce type
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Unhandled SIGSEGV: A segmentation fault occurred.
This probably occurred because a *compiled* module has a bug
in it and is not properly wrapped with sig_on(), sig_off().
Python will now terminate.
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Erreur de segmentation (core dumped)