From d17155f5d26f7ecb75d24d190c28a46f179c5d37 Mon Sep 17 00:00:00 2001
From: Garret Rieger <grieger@google.com>
Date: Wed, 13 Oct 2021 14:40:00 -0700
Subject: [PATCH] [repacker] use possibly updated root idx after
 isolate_subgraph.

isolate_subgraph can change the root indices in some cases. So operations after the isolation need to use the roots from the output of isolate_subgraph.
---
 src/hb-repacker.hh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/hb-repacker.hh b/src/hb-repacker.hh
index 14e105694..288bae55f 100644
--- a/src/hb-repacker.hh
+++ b/src/hb-repacker.hh
@@ -1048,7 +1048,8 @@ static bool _try_isolating_subgraphs (const hb_vector_t<graph_t::overflow_record
     hb_set_t roots;
     roots.add (root);
     sorted_graph.isolate_subgraph (roots);
-    sorted_graph.move_to_new_space (root);
+    for (unsigned new_root : roots)
+      sorted_graph.move_to_new_space (new_root);
     return true;
   }
   return false;