Check for non-ignored children instead of all of them

dag_in_context/src/greedy_dag_extractor.rs

@@ -230,7 +230,15 @@ pub fn extract(
             continue;
         }
 
-        if node.children.iter().all(|c| costs.contains_key(n2c(c))) {
+        let ignored_children = cm.ignored_children(&node.op);
+        let all_non_ignored_children_have_costs = node
+            .children
+            .iter()
+            .enumerate()
+            .filter(|(i, _c)| !ignored_children.contains(i))
+            .all(|(_i, c)| costs.contains_key(n2c(c)));
+
+        if all_non_ignored_children_have_costs {
             let prev_cost = match costs.get(class_id) {
                 Some(cost_set) => cost_set.total,
                 None => std::f64::INFINITY.try_into().unwrap(),