/usr/share/doc/cpp-arm-linux-gnueabi/README.Bugs is in gcc-arm-linux-gnueabi 4:7.3.0-3ubuntu2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/cpp-arm-linux-gnueabi/../gcc-7-arm-linux-gnueabi-base/README.Bugs