This file is indexed.

/usr/lib/mono/4.0/Mono.CodeContracts.dll is in libmono-codecontracts4.0-cil 2.10.8.1-1ubuntu2.3.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/mono/4.0/../gac/Mono.CodeContracts/4.0.0.0__0738eb9f132ed756/Mono.CodeContracts.dll