another fix try

src/free_blocks_allocator.cpp

@@ -206,7 +206,8 @@ void FreeBlocksAllocator::RecreateEPTreeIfNeeded() {
     return;
   std::vector<FreeBlocksRangeInfo> blocks_to_delete;
   // eptree is empty (aka have only initial FTreee), resize it to one eptree
-  for (auto& [node_level, node_it] : std::views::reverse(last.base().nodes())) {
+  auto nodes = last.base().nodes();
+  for (auto& [node_level, node_it] : std::views::reverse(nodes)) {
     if (node_level->header() == &eptree.tree_header()->current_tree) {
       // this is the root, reinitialize it
       node_level->Init(1);

src/free_blocks_allocator_tree.h

@@ -801,12 +801,14 @@ class PTreeIterator {
       }
       uint16_t node_offset = (*rparent->iterator).value;
       for (auto parent = rparent.base(); parent != parents_.end(); ++parent) {
-        *parent = {{node_ref<ParentNodeDetails>{block_, node_offset}}};
-        parent->iterator = parent->node->begin();
+        parent_node_info new_parent{{{block_, node_offset}}};
+        new_parent.iterator = new_parent.node->begin();
+        *parent = std::move(new_parent);
         node_offset = (*parent->iterator).value;
       }
-      leaf_ = {{node_ref<LeafNodeDetails>{block_, node_offset}}};
-      leaf_->iterator = leaf_->node->begin();
+      leaf_node_info new_leaf{{{block_, node_offset}}};
+      new_leaf.iterator = new_leaf.node->begin();
+      leaf_ = std::move(new_leaf);
     }
     return *this;
   }
@@ -823,13 +825,15 @@ class PTreeIterator {
       }
       uint16_t node_offset = (*--rparent->iterator).value;  // TODO: by ref
       for (auto parent = rparent.base(); parent != parents_.end(); ++parent) {
-        *parent = {{node_ref<ParentNodeDetails>{block_, node_offset}}};
-        parent->iterator = parent->node->end();
-        --parent->iterator;
+        parent_node_info new_parent{{{block_, node_offset}}};
+        new_parent.iterator = new_parent.node->end();
+        --new_parent.iterator;
+        *parent = std::move(new_parent);
         node_offset = (*parent->iterator).value;  // TODO: by ref
       }
-      leaf_ = {{node_ref<LeafNodeDetails>{block_, node_offset}}};
-      leaf_->iterator = leaf_->node->end();
+      leaf_node_info new_leaf{{{block_, node_offset}}};
+      new_leaf.iterator = new_leaf.node->end();
+      leaf_ = std::move(new_leaf);
     }
     --leaf_->iterator;
     return *this;