From 9aad3dba8f6cc91c8039ebfc2c6c6c5fd179a74b Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Wed, 26 Oct 2022 13:04:02 -0600
Subject: [PATCH] [SingleSubst] Fix degenerate-lookup test

Part of https://github.com/harfbuzz/harfbuzz/issues/3853
---
 src/OT/Layout/GSUB/SingleSubstFormat1.hh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/OT/Layout/GSUB/SingleSubstFormat1.hh b/src/OT/Layout/GSUB/SingleSubstFormat1.hh
index 13665d7ba..1be21b98b 100644
--- a/src/OT/Layout/GSUB/SingleSubstFormat1.hh
+++ b/src/OT/Layout/GSUB/SingleSubstFormat1.hh
@@ -57,7 +57,7 @@ struct SingleSubstFormat1_3
     hb_codepoint_t max_before = intersection.get_max ();
     hb_codepoint_t min_after = (min_before + d) & mask;
     hb_codepoint_t max_after = (max_before + d) & mask;
-    if (pop >= max_before - min_before &&
+    if (intersection.get_population () == max_before - min_before + 1 &&
 	((min_before <= min_after && min_after <= max_before) ||
 	 (min_before <= max_after && max_after <= max_before)))
       return;