From 1572ba281acb7fb3510d97e0f52bea83a1d6050d Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Mon, 21 Nov 2022 22:26:44 -0700
Subject: [PATCH] [subset-cff] Return in subr closure if already seen subr

Not sure why this was not done before.
---
 src/hb-subset-cff-common.hh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/hb-subset-cff-common.hh b/src/hb-subset-cff-common.hh
index b4e2832e1..338b0acf7 100644
--- a/src/hb-subset-cff-common.hh
+++ b/src/hb-subset-cff-common.hh
@@ -825,6 +825,8 @@ struct subr_subsetter_t
 				  hb_set_t *closure,
 				  const subr_subset_param_t &param)
   {
+    if (closure->has (subr_num))
+      return;
     closure->add (subr_num);
     collect_subr_refs_in_str (subrs[subr_num], param);
   }