From 479f736935f3eadb2d902d8fb00b4e52a0a938f7 Mon Sep 17 00:00:00 2001
From: Niki C <51484888+inventednight@users.noreply.github.com>
Date: Wed, 12 Jun 2024 12:09:59 -0400
Subject: [PATCH] io: improve panic message of `ReadBuf::put_slice()` (#6629)

---
 tokio/src/io/read_buf.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tokio/src/io/read_buf.rs b/tokio/src/io/read_buf.rs
index 283d96e30..ec53ea7a2 100644
--- a/tokio/src/io/read_buf.rs
+++ b/tokio/src/io/read_buf.rs
@@ -248,7 +248,9 @@ impl<'a> ReadBuf<'a> {
     pub fn put_slice(&mut self, buf: &[u8]) {
         assert!(
             self.remaining() >= buf.len(),
-            "buf.len() must fit in remaining()"
+            "buf.len() must fit in remaining(); buf.len() = {}, remaining() = {}",
+            buf.len(),
+            self.remaining()
         );
 
         let amt = buf.len();