--- a/btrfs-list.c	2012-12-30 12:20:01.394137593 +0100
+++ b/btrfs-list.c	2012-12-30 12:22:47.242452906 +0100
@@ -1004,6 +1004,23 @@
 	return 0;
 }
 
+static void __drop_deleting_roots(struct root_lookup *root_lookup)
+{
+	struct rb_node *n;
+
+again:
+	n = rb_first(&root_lookup->root);
+	while (n) {
+		struct root_info *entry = rb_entry(n, struct root_info, rb_node);
+		if (!entry->ref_tree) {
+			rb_erase(n, &root_lookup->root);
+			free(entry);
+			goto again;
+		}
+		n = rb_next(n);
+	}
+}
+
 static int __list_subvol_search(int fd, struct root_lookup *root_lookup)
 {
 	int ret;
@@ -1123,6 +1140,8 @@
 			break;
 	}
 
+	__drop_deleting_roots(root_lookup);
+
 	return 0;
 }