1 files changed, 8 insertions, 0 deletions
diff --git a/thirdparty/embree/kernels/bvh/bvh_node_qaabb.h b/thirdparty/embree/kernels/bvh/bvh_node_qaabb.h
index 2afc8c98e7..99671ddc5a 100644
--- a/thirdparty/embree/kernels/bvh/bvh_node_qaabb.h
+++ b/thirdparty/embree/kernels/bvh/bvh_node_qaabb.h
@@ -190,6 +190,14 @@ namespace embree
       template<typename BuildRecord>
       __forceinline NodeRef operator() (const BuildRecord& precord, const BuildRecord* crecords, NodeRef ref, NodeRef* children, const size_t num) const
       {
+#if defined(DEBUG)
+        // check that empty children are only at the end of the child list
+        bool emptyChild = false;
+        for (size_t i=0; i<num; i++) {
+          emptyChild |= (children[i] == NodeRef::emptyNode);
+          assert(emptyChild == (children[i] == NodeRef::emptyNode));
+        }
+#endif
         QuantizedNode_t* node = ref.quantizedNode();
         for (size_t i=0; i<num; i++) node->setRef(i,children[i]);
         return ref;