From e617faabe7cbb721ffa585aef6ab00e2b85da318 Mon Sep 17 00:00:00 2001
From: Gary Guo <gary@garyguo.net>
Date: Mon, 31 Jul 2023 12:28:53 +0100
Subject: [PATCH] Add missing feature gate in multiple_supertrait_upcastable
 doc

---
 compiler/rustc_lint/src/multiple_supertrait_upcastable.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs b/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs
index 53fe0ceb23400..84558ee1f020c 100644
--- a/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs
+++ b/compiler/rustc_lint/src/multiple_supertrait_upcastable.rs
@@ -10,6 +10,7 @@ declare_lint! {
     /// ### Example
     ///
     /// ```rust
+    /// #![feature(multiple_supertrait_upcastable)]
     /// trait A {}
     /// trait B {}
     ///