pkgs/applications/misc/prusa-slicer/meshboolean-const.patch

   1 diff --git a/src/libslic3r/MeshBoolean.cpp b/src/libslic3r/MeshBoolean.cpp
   2 index 31fdc35..32acbf8 100644
   3 --- a/src/libslic3r/MeshBoolean.cpp
   4 +++ b/src/libslic3r/MeshBoolean.cpp
   5 @@ -147,12 +147,12 @@ template<class _Mesh> TriangleMesh cgal_to_triangle_mesh(const _Mesh &cgalmesh)
   6      const auto &vertices = cgalmesh.vertices();
   7      int vsize = int(vertices.size());
   8
   9 -    for (auto &vi : vertices) {
  10 +    for (const auto &vi : vertices) {
  11          auto &v = cgalmesh.point(vi); // Don't ask...
  12          its.vertices.emplace_back(to_vec3f(v));
  13      }
  14
  15 -    for (auto &face : faces) {
  16 +    for (const auto &face : faces) {
  17          auto vtc = cgalmesh.vertices_around_face(cgalmesh.halfedge(face));
  18
  19          int i = 0;