/usr/lib/x86_64-linux-gnu/ is in libparams-validate-perl 1.13-1+b1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.20/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Params/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Params/Validate/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Params/Validate/XS/
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Params/Validate/XS/XS.so
/usr/lib/x86_64-linux-gnu/perl5/5.20/auto/Params/Validate/XS/XS.bs
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/ValidateXS.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/Validate.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/ValidatePP.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/Validate/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/Validate/XS.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/Validate/PP.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Params/Validate/Constants.pm
/usr/lib/x86_64-linux-gnu/perl5/5.20/Attribute/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Attribute/Params/
/usr/lib/x86_64-linux-gnu/perl5/5.20/Attribute/Params/Validate.pm