/usr/lib/x86_64-linux-gnu/libicalvcal.so is in libical2-dev 2.0.0-4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libicalvcal.so.2
/usr/lib/x86_64-linux-gnu/libicalvcal.so.2