From 99bc52f6851067661fda3a785b77a548b3702b33 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sat, 9 May 2020 17:12:11 -0700
Subject: [PATCH] Support no-default-features mode in Formatter's impl

---
 serde/src/ser/impls.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/serde/src/ser/impls.rs b/serde/src/ser/impls.rs
index a1346bfa..f78d372f 100644
--- a/serde/src/ser/impls.rs
+++ b/serde/src/ser/impls.rs
@@ -1003,4 +1003,11 @@ impl<'a, 'b> Serializer for &'a mut fmt::Formatter<'b> {
     ) -> Result<Self::SerializeStructVariant, fmt::Error> {
         Err(fmt::Error)
     }
+
+    fn collect_str<T: ?Sized>(self, value: &T) -> fmt::Result
+    where
+        T: Display,
+    {
+        Display::fmt(value, self)
+    }
 }