From a158fb33effaee88bfce664a4dd201c61ff4bb10 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Beno=C3=AEt=20du=20Garreau?= <bdgdlm@outlook.com>
Date: Wed, 31 Jan 2024 11:05:41 +0100
Subject: [PATCH] Improve `io::Read::read_buf_exact` error case

- Use `const_io_error` instead of `Error::new`
- Use the same message as `read_exact`
---
 library/std/src/io/mod.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/library/std/src/io/mod.rs b/library/std/src/io/mod.rs
index 8fca66fa17c..ee79d47ddd9 100644
--- a/library/std/src/io/mod.rs
+++ b/library/std/src/io/mod.rs
@@ -994,7 +994,10 @@ fn read_buf_exact(&mut self, mut cursor: BorrowedCursor<'_>) -> Result<()> {
             }
 
             if cursor.written() == prev_written {
-                return Err(Error::new(ErrorKind::UnexpectedEof, "failed to fill buffer"));
+                return Err(error::const_io_error!(
+                    ErrorKind::UnexpectedEof,
+                    "failed to fill whole buffer"
+                ));
             }
         }