diff --git a/src/libslic3r/BoundingBox.hpp b/src/libslic3r/BoundingBox.hpp
index 9a4c68a147..f8da75ac6d 100644
--- a/src/libslic3r/BoundingBox.hpp
+++ b/src/libslic3r/BoundingBox.hpp
@@ -68,7 +68,9 @@ private:
     template<bool IncludeBoundary = false, class BoundingBoxType, class It, class = IteratorOnly<It>>
     static void construct(BoundingBoxType &out, It from, It to)
     {
-        if (from != to) {
+        if (from == to) {
+            out.defined = false;
+        } else {
             auto it = from;
             out.min = it->template cast<typename PointType::Scalar>();
             out.max = out.min;
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 5340599722..cdd5874810 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -1611,7 +1611,7 @@ void PrintObject::discover_vertical_shells()
                                                                  to_polygons(m_layers[idx_layer + 1]->lslices) :
                                                                  Polygons{};
                             object_volume = intersection(shrinked_bottom_slice, shrinked_upper_slice);
-                            internal_volume = closing(polygonsInternal, SCALED_EPSILON);
+                            internal_volume = closing(polygonsInternal, float(SCALED_EPSILON));
                         }
 
                         // The regularization operation may cause scattered tiny drops on the smooth parts of the model, filter them out
diff --git a/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp b/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
index 6f372123b1..52d0037819 100644
--- a/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
+++ b/src/slic3r/GUI/Gizmos/GLGizmoCut.cpp
@@ -3022,7 +3022,7 @@ void GLGizmoCut3D::toggle_model_objects_visibility()
 {
     bool has_active_volume = false;
     std::vector<std::shared_ptr<SceneRaycasterItem>>* raycasters = m_parent.get_raycasters_for_picking(SceneRaycaster::EType::Volume);
-    for (const auto raycaster : *raycasters)
+    for (const std::shared_ptr<SceneRaycasterItem> &raycaster : *raycasters)
         if (raycaster->is_active()) {
             has_active_volume = true;
             break;