Bad values for hub-suppressed vertex similarity.

Python 3.7

Graph-tool 2.29

Ubuntu 18.04.2

I'm getting hub-suppressed vertex similarity numbers that don't make sense (ie, they are >1). This can be reproduced using the attached graph-tool file and the following lines of code

import graph_tool.all as gt
g = gt.load_graph('example.gt')
gt.vertex_similarity(g,sim_type='hub-suppressed', 
                     vertex_pairs=[[213574,256329]])

This produces a similarity of 8.28571429

example.gt

NOTE: I compiled graph-tool manually:

================================================================================
                             CONFIGURATION SUMMARY                              
================================================================================
Using python version:   3.7.4
Python interpreter:     /usr/local/anaconda/bin/python
Installation path:      /usr/local/anaconda/lib/python3.7/site-packages/graph_tool

C++ compiler (CXX):     g++ -std=gnu++17
C++ compiler version:   7
...

It looks like my boost version is 1.65.1 (that's what I found in boost/version.hpp in the directory specified in Boost CPP flags)

Thank you.