/usr/lib/x86_64-linux-gnu/libstarlink_ast_pass2.so is in libstarlink-ast-dev 8.6.2+dfsg-2.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libstarlink_ast.so
/usr/lib/x86_64-linux-gnu/libstarlink_ast.so