From 2f57cecf13b091448eb4dfc4c04952930e255273 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Fri, 16 Mar 2018 23:38:50 +0100
Subject: [PATCH] format! -> format_args! for an error message

---
 serde/src/private/de.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/serde/src/private/de.rs b/serde/src/private/de.rs
index 7bc15947..80e7e8c7 100644
--- a/serde/src/private/de.rs
+++ b/serde/src/private/de.rs
@@ -2109,7 +2109,7 @@ impl<'a, 'de, E> Deserializer<'de> for FlatMapDeserializer<'a, 'de, E>
                         continue;
                     }
                 }
-                None => return Err(Error::custom(format!(
+                None => return Err(Error::custom(format_args!(
                     "no variant of enum {} not found in flattened data",
                     name
                 )))