Segmentation fault when calling getbuffer() on Packer object

Hi there,

I'm trying to get the internal data of the Packer object in order to avoid unneeded copying, as documented here.

The code is as follow :

import msgpack

def do_the_job():
  packer = msgpack.Packer(autoreset=False)
  packer.pack(1)
  return packer.getbuffer()

bytes(do_the_job())

When running this snippet, I get the following error :

[1]    9018 segmentation fault (core dumped)  python script.py

I am using Ubuntu 18.04.5 LTS together with msgpack 1.0.2.

Thanks in advance for your help and for your work on this package !

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