rm: 'rm -rf ./' (and ./// variants) silently deletes current directory contents, bypassing dot protection

rm -rf . is correctly refused, but cleantrailingslashes normalizes ./// to ./ while pathiscurrentorparentdirectory only matches ./.. and /.//.., not ./ or ../. So rm -rf ./ recursively deletes the directory's contents and then prints a misleading cannot remove './': Invalid input. Impact: all...