From 5ac431fb084e32b8ea86b800c98738ce49ddab37 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson+github@slimy.greenend.org.uk>
Date: Sat, 12 Dec 2020 13:37:29 +0000
Subject: [PATCH] WriterPanicked: Use debug_struct

Co-authored-by: Ivan Tham <pickfire@riseup.net>
---
 library/std/src/io/buffered/bufwriter.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/library/std/src/io/buffered/bufwriter.rs b/library/std/src/io/buffered/bufwriter.rs
index 94e625b9410..4319febbf91 100644
--- a/library/std/src/io/buffered/bufwriter.rs
+++ b/library/std/src/io/buffered/bufwriter.rs
@@ -382,7 +382,9 @@ impl fmt::Display for WriterPanicked {
 #[unstable(feature = "bufwriter_into_raw_parts", issue = "none")]
 impl fmt::Debug for WriterPanicked {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "WriterPanicked{{..buf.len={}..}}", self.buf.len())
+        fmt.debug_struct("WriterPanicked")
+            .field("buffer", &format_args!("{}/{}", self.buf.len(), self.buf.capacity()))
+            .finish()
     }
 }