From 44a5de3a97c6092547d4994c7b10922fbdce15b8 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Sat, 3 Dec 2022 12:50:32 -0700
Subject: [PATCH] [Device] Save a snap/revert

---
 src/hb-ot-layout-common.hh | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/hb-ot-layout-common.hh b/src/hb-ot-layout-common.hh
index b1b47ded3..87c0ae2f5 100644
--- a/src/hb-ot-layout-common.hh
+++ b/src/hb-ot-layout-common.hh
@@ -3455,16 +3455,14 @@ struct VariationDevice
   {
     TRACE_SERIALIZE (this);
     if (!layout_variation_idx_delta_map) return_trace (nullptr);
-    auto snap = c->snapshot ();
-    auto *out = c->embed (this);
-    if (unlikely (!out)) return_trace (nullptr);
 
     hb_pair_t<unsigned, int> *v;
     if (!layout_variation_idx_delta_map->has (varIdx, &v))
-    {
-      c->revert (snap);
       return_trace (nullptr);
-    }
+
+    auto *out = c->embed (this);
+    if (unlikely (!out)) return_trace (nullptr);
+
     unsigned new_idx = hb_first (*v);
     out->varIdx = new_idx;
     return_trace (out);