/usr/lib/x86_64-linux-gnu/libunwind-coredump.so is in libunwind-dev 1.1-4.1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libunwind-coredump.so.0.0.0
/usr/lib/x86_64-linux-gnu/libunwind-coredump.so.0.0.0