Python: Polyline.GetSegments() returns last element with <NULL> causing segfault

[boblyx]

Tested on 8.0.1, 8.4.0, 8.6.0, 8.6.1, on Debian Bookworm, Python 3.10.13 (gcc 12.2) Given this sample code:

from rhino3dm import Point3d, Polyline
pl = Polyline(4)
points = [[1,1,1], [2,2,2], [3,3,3], [4,4,4], [1,1,1]]
for i,p in enumerate(points):
    pl.Add(p[0], p[1], p[2])
a = None
try:
    a = pl.GetSegments()
except Exception as e:
    print(e)
print(a)

The print output:

(<rhino3dm._rhino3dm.LineCurve object at 0x7ec362f999b0>, <rhino3dm._rhino3dm.LineCurve object at 0x7ec34c143ab0>, <NULL>)

Accessing the object results in a segmentation fault. Testing the same thing in RhinoCommon gives me 4 lines as expected.

[fraguada]

Thanks for reporting this. We were incorrectly creating an array with Polyline.Count instead of Polyline.Count - 1. This set of actions should produce some wheels with the fixed code: https://github.com/mcneel/rhino3dm/actions/runs/9544446906

[fraguada]

@boblyx if an ubuntu build works for you, try: https://github.com/mcneel/rhino3dm/actions/runs/9544446906/artifacts/1607659788

[boblyx]

Thanks @fraguada I have tested it and the wheel you linked (https://github.com/mcneel/rhino3dm/actions/runs/9544446906/artifacts/1607659788) now displays the correct behaviour.