/usr/lib/ is in gcc-python3-plugin 0.15-4.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/gcc/
/usr/lib/gcc/x86_64-linux-gnu/
/usr/lib/gcc/x86_64-linux-gnu/7/
/usr/lib/gcc/x86_64-linux-gnu/7/plugin/
/usr/lib/gcc/x86_64-linux-gnu/7/plugin/libgcc-c-api.so
/usr/lib/gcc/x86_64-linux-gnu/7/plugin/python3/
/usr/lib/gcc/x86_64-linux-gnu/7/plugin/python3.so
/usr/lib/python3/
/usr/lib/python3/dist-packages/
/usr/lib/python3/dist-packages/gccutils/
/usr/lib/python3/dist-packages/gccutils/__init__.py
/usr/lib/python3/dist-packages/gccutils/dot.py
/usr/lib/python3/dist-packages/gccutils/graph/
/usr/lib/python3/dist-packages/gccutils/graph/__init__.py
/usr/lib/python3/dist-packages/gccutils/graph/ivpgraph.py
/usr/lib/python3/dist-packages/gccutils/graph/query.py
/usr/lib/python3/dist-packages/gccutils/graph/stmtgraph.py
/usr/lib/python3/dist-packages/gccutils/graph/supergraph.py
/usr/lib/python3/dist-packages/gccutils/selftests.py
/usr/lib/python3/dist-packages/libcpychecker/
/usr/lib/python3/dist-packages/libcpychecker/PyArg_ParseTuple.py
/usr/lib/python3/dist-packages/libcpychecker/Py_BuildValue.py
/usr/lib/python3/dist-packages/libcpychecker/__init__.py
/usr/lib/python3/dist-packages/libcpychecker/absinterp.py
/usr/lib/python3/dist-packages/libcpychecker/attributes.py
/usr/lib/python3/dist-packages/libcpychecker/c_stdio.py
/usr/lib/python3/dist-packages/libcpychecker/compat.py
/usr/lib/python3/dist-packages/libcpychecker/diagnostics.py
/usr/lib/python3/dist-packages/libcpychecker/formatstrings.py
/usr/lib/python3/dist-packages/libcpychecker/initializers.py
/usr/lib/python3/dist-packages/libcpychecker/refcounts.py
/usr/lib/python3/dist-packages/libcpychecker/types.py
/usr/lib/python3/dist-packages/libcpychecker/utils.py
/usr/lib/python3/dist-packages/libcpychecker/visualizations.py
/usr/lib/gcc/x86_64-linux-gnu/7/plugin/python3/gccutils
/usr/lib/gcc/x86_64-linux-gnu/7/plugin/python3/libcpychecker