From 7eeb169f9b51e2a30997d6c92aa3e170a2927b7f Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sun, 5 Mar 2023 10:16:06 -0800
Subject: [PATCH] Fix message duplication between error Display and source()

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

diff --git a/src/error.rs b/src/error.rs
index 1875ef08b..0898baf90 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -319,7 +319,7 @@ impl serde::de::StdError for Error {
     #[cfg(feature = "std")]
     fn source(&self) -> Option<&(dyn error::Error + 'static)> {
         match &self.err.code {
-            ErrorCode::Io(err) => Some(err),
+            ErrorCode::Io(err) => err.source(),
             _ => None,
         }
     }