Issue accessing TTree branch directly from my Python interpreter

[drinkingkazu]

Getting a segfault for attempting to access TTree branch in "my usual" way:

$> python
>>> from ROOT import TChain
>>> ch=TChain("EDepSimEvents")
>>> ch.AddFile("tako.root")
>>> ch.GetEntries()
10
>>> ch.GetEntry(0)
>>> ch.Trajectories
<cppyy.gbl.std.vector<TG4Trajectory> object at 0x5b38630>
>>> ch.Trajectories.size()
8737931403336129456
>>> ch.Trajectories.at(0)
 *** Break *** segmentation violation

Maybe there's an incomplete dictionary generated for this object?
Is this not supported in edep-sim?

For a reference, data file is generated using inputs/example.gdml, also available here.
Thanks for your help!

[drinkingkazu]

Resolved: apparently Trajectories is a public attribute of TG4Event object.
So the following access method works

>>> ch.Event.Trajectories.size()
>>> ch.Event.Trajectories.at(0)

... which respects the scope.