PyROOT crash after canvas.GetListOfPrimitives() call

I am seeing a crash when calling the GetListOfPrimitives() function of a TCanvas object in PyROOT. See very simple example code below to reproduce it. In the simple example, the crash occurs when python exists. It does not occur if I comment out the GetListOfPrimitives() call. Any idea what could be wrong?

I’ve tested this with the ATLAS environment on lxplus and can reproduce it with root 6.12.04-x86_64-slc6-gcc62-opt and python 2.7. However everything is fine with 6.10.06-x86_64-slc6-gcc62-opt.

Example code is:

import ROOT

c=ROOT.TCanvas()

print(c.GetListOfPrimitives())

exit()

The output is:

<ROOT.TList object ("TList") at 0x56081804a110>

pure virtual method called

terminate called without an active exception

Aborted (core dumped)

More information is that according to Andreas Weiden, this works if you make the canvas inside a function.

import ROOT

def f():

    c = ROOT.TCanvas()

    print(c.GetListOfPrimitives())

f()

exit()

Note: I originally reported this at the ROOT Forums.