/usr/share/perl5/Slic3r/GUI/ is in slic3r 1.2.9+dfsg-2build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/perl5/Slic3r/GUI/3DScene.pm
/usr/share/perl5/Slic3r/GUI/AboutDialog.pm
/usr/share/perl5/Slic3r/GUI/BedShapeDialog.pm
/usr/share/perl5/Slic3r/GUI/BonjourBrowser.pm
/usr/share/perl5/Slic3r/GUI/ConfigWizard.pm
/usr/share/perl5/Slic3r/GUI/MainFrame.pm
/usr/share/perl5/Slic3r/GUI/Notifier.pm
/usr/share/perl5/Slic3r/GUI/OptionsGroup/
/usr/share/perl5/Slic3r/GUI/OptionsGroup.pm
/usr/share/perl5/Slic3r/GUI/OptionsGroup/Field.pm
/usr/share/perl5/Slic3r/GUI/Plater/
/usr/share/perl5/Slic3r/GUI/Plater.pm
/usr/share/perl5/Slic3r/GUI/Plater/2D.pm
/usr/share/perl5/Slic3r/GUI/Plater/2DToolpaths.pm
/usr/share/perl5/Slic3r/GUI/Plater/3D.pm
/usr/share/perl5/Slic3r/GUI/Plater/3DPreview.pm
/usr/share/perl5/Slic3r/GUI/Plater/ObjectCutDialog.pm
/usr/share/perl5/Slic3r/GUI/Plater/ObjectPartsPanel.pm
/usr/share/perl5/Slic3r/GUI/Plater/ObjectSettingsDialog.pm
/usr/share/perl5/Slic3r/GUI/Plater/OverrideSettingsPanel.pm
/usr/share/perl5/Slic3r/GUI/Preferences.pm
/usr/share/perl5/Slic3r/GUI/ProgressStatusBar.pm
/usr/share/perl5/Slic3r/GUI/SimpleTab.pm
/usr/share/perl5/Slic3r/GUI/Tab.pm