Joan Solà Ortega · 0c4fa21a
--- a/src/processor_tracker_feature.cpp
+++ b/src/processor_tracker_feature.cpp
-        auto constraint  = createConstraint(feature_in_last, feature_in_origin);
-        feature_in_last  ->addConstraint(constraint);
-        feature_in_origin->addConstrainedBy(constraint);
+        auto ctr_ptr  = createConstraint(feature_in_last, feature_in_origin);
+        feature_in_last  ->addConstraint(ctr_ptr);
+        feature_in_origin->addConstrainedBy(ctr_ptr);
+
+        if (ctr_ptr != nullptr) // constraint links
+        {
+            FrameBasePtr frm = ctr_ptr->getFrameOtherPtr();
+            if (frm)
+                frm->addConstrainedBy(ctr_ptr);
+            CaptureBasePtr cap = ctr_ptr->getCaptureOtherPtr();
+            if (cap)
+                cap->addConstrainedBy(ctr_ptr);
+        }