Add missing feature gate in multiple_supertrait_upcastable doc

rust-lang · Jul 31, 2023 · e617faa · e617faa
1 parent 5082281
commit e617faa
Showing 1 changed file with 1 addition and 0 deletions.
diff --git 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 {}
     ///