From 780a461d926a05c0d18847a24b1bec596e4f399d Mon Sep 17 00:00:00 2001
From: Mingun <Alexander_Sergey@mail.ru>
Date: Mon, 26 Oct 2020 22:06:00 +0500
Subject: [PATCH] Generate one deserializer rather than in each arm

---
 serde_derive/src/de.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/serde_derive/src/de.rs b/serde_derive/src/de.rs
index 2dfe87ef..2e86fd86 100644
--- a/serde_derive/src/de.rs
+++ b/serde_derive/src/de.rs
@@ -1356,9 +1356,7 @@ fn deserialize_internally_tagged_enum(
                 params,
                 variant,
                 cattrs,
-                quote! {
-                    _serde::__private::de::ContentDeserializer::<__D::Error>::new(__tagged.content)
-                },
+                quote!(__deserializer),
             ));
 
             quote! {
@@ -1377,6 +1375,7 @@ fn deserialize_internally_tagged_enum(
         let __tagged = try!(_serde::Deserializer::deserialize_any(
             __deserializer,
             _serde::__private::de::TaggedContentVisitor::<__Field>::new(#tag, #expecting)));
+        let __deserializer = _serde::__private::de::ContentDeserializer::<__D::Error>::new(__tagged.content);
 
         match __tagged.tag {
             #(#variant_arms)*