From 6120f50c8f52ff2e8e3c7d4f86f17fc259dcec50 Mon Sep 17 00:00:00 2001
From: ariza <ariza@adobe.com>
Date: Wed, 19 Feb 2020 13:55:39 -0800
Subject: [PATCH] fix Head with link.bias

---
 src/hb-serialize.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-serialize.hh b/src/hb-serialize.hh
index 5609b6369..21e8bcc23 100644
--- a/src/hb-serialize.hh
+++ b/src/hb-serialize.hh
@@ -324,7 +324,7 @@ struct hb_serialize_context_t
 	if (unlikely (!child)) { err_other_error(); return; }
 	unsigned offset;
 	switch ((whence_t)link.whence) {
-	case Head:     offset = child->head - parent->head; break;
+	case Head:     offset = (child->head - parent->head) - link.bias; break;
 	case Tail:     offset = child->head - parent->tail; break;
 	case Absolute: offset = (head - start) + (child->head - tail); break;
 	default: assert (0);