Check if there are insets before using them

If there are no insets, there will be no infill or skin area and everything can remain empty.

Fixes Ultimaker/Cura#10657.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/skin.cpp b/src/skin.cpp
index 0da59c7ed..204bf3bfd 100644
--- a/src/skin.cpp
+++ b/src/skin.cpp
@@ -187,7 +187,10 @@ void SkinInfillAreaComputation::generateSkinAndInfillAreas()
  */
 void SkinInfillAreaComputation::generateSkinAndInfillAreas(SliceLayerPart& part)
 {
-
+    if(part.insets.empty())
+    {
+        return;
+    }
     Polygons original_outline = part.insets.back().offset(-innermost_wall_line_width / 2);
 
     // make a copy of the outline which we later intersect and union with the resized skins to ensure the resized skin isn't too large or removed completely.