Please use the issue tracker only to report bugs (i.e. errors in the library that need to be fixed) or feature requests.
Please check if the current git version also has the same problem. An easy way to do this is to use google colab!
For questions about how to compile, install or use the library, please use instead the web forum at https://forum.skewed.de/c/graph-tool.
(If unsure, use the forum first.)
IMPORTANT: When opening new issues, please fill out the required information listed in the issue template!
This small program ends up with a Segmentation fault on my machine.
My guess is that there is some problem when managing reference counts inside the edge_endpoint_property function.
Can you execute it to see if you reproduce the problem?