/usr/lib/python2.7/dist-packages/blockdiag-1.3.2.egg-info/SOURCES.txt is in python-blockdiag 1.3.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/python2.7/dist-packages/blockdiag-1.3.2.egg-info/../../../../share/pyshared/blockdiag-1.3.2.egg-info/SOURCES.txt