PureData memory leak becomes virulent when LFOs are running

[toniarnold]

Both Pd 0.47.1 for OS X and Pd 0.46.2 for Raspbian slowly, but steadily leak memory when an LFO is running, what effectively makes bulbs.pd unusable as a long-running system service. Reproducible in local control mode without actual bulbs when running the server with

./bulbs.py --mock

[toniarnold]

Commit pure-data/pure-data@ccad7db seems to fix the memory leak - but there are stability issues under heavy load when running as a service:
systemd[1]: bulbs-pd.service: main process exited, code=killed, status=11/SEGV
To use it nevertheless, clone
https://github.com/pure-data/pure-data.git
and checkout the branch
update/0.48.0
To build Pd-vanilla only on Raspbian Jessie according to
https://puredata.info/docs/developer/BuildingPd
https://puredata.info/docs/developer/Debian
the required build dependency is
sudo apt-get build-dep puredata
For running the binary in bulbs-pd.service, I have blindly installed it aside stable 0.46.2-1 and ignored the warnings about missing dependencies for now:
sudo cp ./pure-data/bin/pd /usr/bin/pd-0.48.0