/usr/share/perl5/PPIx/Regexp/Structure/ is in libppix-regexp-perl 0.050-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/PPIx/Regexp/Structure/Assertion.pm
/usr/share/perl5/PPIx/Regexp/Structure/BranchReset.pm
/usr/share/perl5/PPIx/Regexp/Structure/Capture.pm
/usr/share/perl5/PPIx/Regexp/Structure/CharClass.pm
/usr/share/perl5/PPIx/Regexp/Structure/Code.pm
/usr/share/perl5/PPIx/Regexp/Structure/Main.pm
/usr/share/perl5/PPIx/Regexp/Structure/Modifier.pm
/usr/share/perl5/PPIx/Regexp/Structure/NamedCapture.pm
/usr/share/perl5/PPIx/Regexp/Structure/Quantifier.pm
/usr/share/perl5/PPIx/Regexp/Structure/RegexSet.pm
/usr/share/perl5/PPIx/Regexp/Structure/Regexp.pm
/usr/share/perl5/PPIx/Regexp/Structure/Replacement.pm
/usr/share/perl5/PPIx/Regexp/Structure/Subexpression.pm
/usr/share/perl5/PPIx/Regexp/Structure/Switch.pm
/usr/share/perl5/PPIx/Regexp/Structure/Unknown.pm