1 files changed, 8 insertions, 0 deletions
diff --git a/thirdparty/embree/kernels/bvh/bvh_node_aabb_mb.h b/thirdparty/embree/kernels/bvh/bvh_node_aabb_mb.h
index c4cea7d8ba..001f526c25 100644
--- a/thirdparty/embree/kernels/bvh/bvh_node_aabb_mb.h
+++ b/thirdparty/embree/kernels/bvh/bvh_node_aabb_mb.h
@@ -31,6 +31,14 @@ namespace embree
       template<typename BuildRecord>
       __forceinline NodeRecordMB operator() (const BuildRecord& precord, const BuildRecord* crecords, NodeRef ref, NodeRecordMB* 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].ref == NodeRef::emptyNode);
+          assert(emptyChild == (children[i].ref == NodeRef::emptyNode));
+        }
+#endif
         AABBNodeMB_t* node = ref.getAABBNodeMB();
         
         LBBox3fa bounds = empty;