Hello. freecad included non-free content. File list: "freecad-0.15.4671/src/Gui/Icons/edit-cut.svg" "freecad-0.15.4671/src/Mod/Mesh/Gui/Resources/icons/mesh_cut.svg" See: https://lintian.debian.org/tags/license-problem-cc-by-nc-sa.html (freecad Section). This files license is cc-by-nc-sa. It is non-free. Thanks.
Has upstream been informed?
These files are not CC-BY-NC-SA, I have no idea why Debian's lintian flagged them as such. edit-cut.svg is taken from the Tango Icons theme, which was once CC-BY-SA and is now in the Public Domain: https://github.com/FreeCAD/FreeCAD/blob/master/src/Gui/Icons/edit-cut.svg https://commons.wikimedia.org/wiki/File:Edit-cut.svg http://tango.freedesktop.org/Frequently_Asked_Questions#Terms_of_Use.3F mesh_cut.svg is clearly derived from edit-cut.svg: https://github.com/FreeCAD/FreeCAD/blob/master/src/Mod/Mesh/Gui/Resources/icons/mesh_cut.svg There is no evidence of this file being licensed CC-BY-NC-SA, in fact, because the original work is Public Domain, their "artwork license declaration would apply", making it LGPL: http://www.freecadweb.org/wiki/?title=FAQ#Licensing.2C_copying_and_reuse Closing as NOTABUG.