diff options
| -rw-r--r-- | source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc b/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc index 2544bb1642c..e1959c8bf5e 100644 --- a/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc +++ b/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc @@ -653,11 +653,17 @@ void update_list_orig_pointers(const ListBase *listbase_orig, { T *element_orig = reinterpret_cast<T *>(listbase_orig->first); T *element_cow = reinterpret_cast<T *>(listbase->first); - while (element_orig != nullptr) { + + /* Both lists should have the same number of elements, so the check on + * `element_cow` is just to prevent a crash if this is not the case. */ + while (element_orig != nullptr && element_cow != nullptr) { element_cow->*orig_field = element_orig; element_cow = element_cow->next; element_orig = element_orig->next; } + + BLI_assert((element_orig == nullptr && element_cow == nullptr) || + !"list of pointers of different sizes, unable to reliably set orig pointer"); } void update_particle_system_orig_pointers(const Object *object_orig, Object *object_cow) |