3 files changed, 7 insertions, 0 deletions
diff --git a/src/GudhUI/utils/Critical_points.h b/src/GudhUI/utils/Critical_points.h
index b88293e9..2a18e079 100644
--- a/src/GudhUI/utils/Critical_points.h
+++ b/src/GudhUI/utils/Critical_points.h
@@ -105,6 +105,9 @@ template<typename SkBlComplex> class Critical_points {
     if (link.empty())
       return 0;
 
+    Edge_contractor<Complex> contractor(link, link.num_vertices() - 1);
+    (void)contractor;
+
     if (link.num_connected_components() > 1)
       // one than more CC -> not contractible
       return 0;
diff --git a/src/GudhUI/utils/Is_manifold.h b/src/GudhUI/utils/Is_manifold.h
index 6dd7898e..d0974463 100644
--- a/src/GudhUI/utils/Is_manifold.h
+++ b/src/GudhUI/utils/Is_manifold.h
@@ -76,6 +76,8 @@ template<typename SkBlComplex> class Is_manifold {
 
   bool is_k_sphere(Vertex_handle v, int k) {
     auto link = input_complex_.link(v);
+    Edge_contractor<Complex> contractor(link, link.num_vertices() - 1);
+    (void)contractor;
     return (is_sphere_simplex(link) == k);
   }
 
diff --git a/src/GudhUI/utils/Vertex_collapsor.h b/src/GudhUI/utils/Vertex_collapsor.h
index 3f0e7ffd..568dab2f 100644
--- a/src/GudhUI/utils/Vertex_collapsor.h
+++ b/src/GudhUI/utils/Vertex_collapsor.h
@@ -80,6 +80,8 @@ template<typename SkBlComplex> class Vertex_collapsor {
     if (link.empty()) return false;
     if (link.is_cone()) return true;
     if (link.num_connected_components() > 1) return false;
+    Edge_contractor<Complex> contractor(link, link.num_vertices() - 1);
+    (void)contractor;
     return (link.num_vertices() == 1);
   }
 };