From 2eb7e0e0e923d096d2598133cacd6e5ee04a6a04 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Tue, 7 May 2019 12:45:38 -0700
Subject: [PATCH] [serialize] Minor

---
 src/hb-serialize.hh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/hb-serialize.hh b/src/hb-serialize.hh
index 27c8c1778..7e46df265 100644
--- a/src/hb-serialize.hh
+++ b/src/hb-serialize.hh
@@ -165,7 +165,7 @@ struct hb_serialize_context_t
 
     /* Only "pack" if there exist other objects... Otherwise, don't bother.
      * Saves a move. */
-    if (packed.length == 1)
+    if (packed.length <= 1)
       return;
 
     pop_pack ();
@@ -285,7 +285,10 @@ struct hb_serialize_context_t
 
   void resolve_links ()
   {
+    if (unlikely (in_error ())) return;
+
     assert (!current);
+    assert (packed.length > 1);
 
     for (const object_t *parent : ++hb_iter (packed))
     {