/usr/lib/python2.7/dist-packages/social_auth/backends/pipeline/associate.py is in python-django-social-auth 0.7.23-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/social_auth/backends/pipeline/../../../../../../share/pyshared/social_auth/backends/pipeline/associate.py