message: globalmeshingheap: initialize instance pointer
diff: @@ -315,6 +315,7 @@ protected:
  // check for meshes in all size classes
  void meshAllSizeClasses() {
  MeshArguments args;
  + args.instance = this;
  // FIXME: is it safe to have this function not use internal::allocator?
  auto meshFound = function<void(internal::vector<MiniHeap *> &&)>(
  