diff --git a/src/libslic3r/PerimeterGenerator.cpp b/src/libslic3r/PerimeterGenerator.cpp
index 34d8bd28d7..e31f043284 100644
--- a/src/libslic3r/PerimeterGenerator.cpp
+++ b/src/libslic3r/PerimeterGenerator.cpp
@@ -405,6 +405,7 @@ static ExtrusionEntityCollection traverse_loops(const PerimeterGenerator &perime
 
             // Reapply the nearest point search for starting point.
             // We allow polyline reversal because Clipper may have randomly reversed polylines during clipping.
+            if(paths.empty()) continue;
             chain_and_reorder_extrusion_paths(paths, &paths.front().first_point());
             // smothing the overhang degree
             // merge small path between paths which have same overhang degree
diff --git a/src/libslic3r/ShortestPath.cpp b/src/libslic3r/ShortestPath.cpp
index 56b1234c18..a2a2680f52 100644
--- a/src/libslic3r/ShortestPath.cpp
+++ b/src/libslic3r/ShortestPath.cpp
@@ -1042,6 +1042,7 @@ std::vector<std::pair<size_t, bool>> chain_extrusion_paths(std::vector<Extrusion
 void reorder_extrusion_paths(std::vector<ExtrusionPath> &extrusion_paths, const std::vector<std::pair<size_t, bool>> &chain)
 {
 	assert(extrusion_paths.size() == chain.size());
+	if(extrusion_paths.empty()) return;
 	std::vector<ExtrusionPath> out;
 	out.reserve(extrusion_paths.size());
     for (const std::pair<size_t, bool> &idx : chain) {