Help troubleshoot edge_control_points

The following snippet produces an output with nice curvey edges:

from graph_tool import load_graph, Graph
from graph_tool.draw import graph_draw

g = Graph()                                                                                                                                                                        
pos = g.new_vertex_property('vector<float>')                                                                                                                                       
pos[g.vertex(0)] = [0, 0]                                                                                                                                                          
pos[g.vertex(1)] = [0, 1]                                                                                                                                                          
pos[g.vertex(2)] = [1, 0]                                                                                                                                                          
pos[g.vertex(3)] = [1, 1]                                                                                                                                                          
g.add_edge(g.vertex(0), g.vertex(3))                                                                                                                                               
g.add_edge(g.vertex(1), g.vertex(2))                                                                                                                                               
g.vertex_properties['pos'] = pos                                                                                                                                                   
ctl = g.new_edge_property('vector<float>')
for e in g.edges():
    ctl[e] = [0, 0, 0.25, 0.2, 0.75, 0.2, 1, 0]
graph_draw(g, pos=g.vp.pos, edge_control_points=ctl, output='tmp.eps')

But when I replace the graph here with one loaded from the attached .gt
file, I get no edges drawn at al. If I take out the `pos` argument though,
the curvey edges come back. Suggestions for getting both positions and
curvey edges?

This looks like a bug. Could you please open an issue for it at the
website, with the example you sent? Thanks.


Done <; . Thanks.