From 70fe8a6dc4a903bae3f630ac1dcc5cd27faa9e02 Mon Sep 17 00:00:00 2001
From: Sidney Cammeresi <sac@cheesecake.org>
Date: Wed, 22 Apr 2026 21:21:55 -0700
Subject: [PATCH] Add `Sender` diagnostic item for `std::sync::mpsc::Sender`

Similar to the existing `Receiver` item, it will be used in Clippy to
detect uses of `is_disconnected` that are racy.
---
 library/std/src/sync/mpsc.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/library/std/src/sync/mpsc.rs b/library/std/src/sync/mpsc.rs
index a1c49bb83010c..460ad02c67d2c 100644
--- a/library/std/src/sync/mpsc.rs
+++ b/library/std/src/sync/mpsc.rs
@@ -330,6 +330,7 @@ pub struct IntoIter<T> {
 /// assert_eq!(3, msg + msg2);
 /// ```
 #[stable(feature = "rust1", since = "1.0.0")]
+#[cfg_attr(not(test), rustc_diagnostic_item = "MpscSender")]
 pub struct Sender<T> {
     inner: mpmc::Sender<T>,
 }