From 792071de4075cb9af0793f0d7c70da0780923bb6 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 22 Oct 2018 23:38:34 -0700
Subject: [PATCH] [morx] Leave ligature on stack after ligating

Test with Apple Color Emoji.ttf of ~66MB and following sequence:

./hb-shape Apple\ Color\ Emoji-old.ttf --font-funcs=ot -u U+1F468,200d,U+1F469,200d,U+1F467,200d,1f466

Should form full family if matching works correctly.  It first makes
family of three, then makes family of four out of that and the last
two characters.

Fixes https://github.com/harfbuzz/harfbuzz/issues/1292
---
 src/hb-aat-layout-morx-table.hh | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/hb-aat-layout-morx-table.hh b/src/hb-aat-layout-morx-table.hh
index 651af2188..ddb444c21 100644
--- a/src/hb-aat-layout-morx-table.hh
+++ b/src/hb-aat-layout-morx-table.hh
@@ -442,7 +442,6 @@ struct LigatureSubtable
 	  action_idx++;
 	}
 	while (!(action & LigActionLast));
-	match_length = 0;
 	buffer->move_to (end);
       }