/usr/lib/x86_64-linux-gnu/libgarcon-1.so is in libgarcon-1-0-dev 0.4.0-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libgarcon-1.so.0.0.0
/usr/lib/x86_64-linux-gnu/libgarcon-1.so.0.0.0