Hi there, I'm trying to get the internal data of the Packer object in order to avoid unneeded copying, as documented [here](https://msgpack-python.readthedocs.io/en/latest/advanced.html). The code is as follow : ````python 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 : ````bash [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 !