From 56e5f614947c7f9ddde17c579e2e17b39260b17d Mon Sep 17 00:00:00 2001
From: Joshua Nelson <jyn514@gmail.com>
Date: Fri, 23 Apr 2021 10:52:38 -0400
Subject: [PATCH] Add `cfg_hide` to the list of known attributes

---
 compiler/rustc_passes/src/check_attr.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/compiler/rustc_passes/src/check_attr.rs b/compiler/rustc_passes/src/check_attr.rs
index 3e59fc4f551..8d3c2bb1c7b 100644
--- a/compiler/rustc_passes/src/check_attr.rs
+++ b/compiler/rustc_passes/src/check_attr.rs
@@ -908,6 +908,7 @@ impl CheckAttrVisitor<'tcx> {
                         // plugins: removed, but rustdoc warns about it itself
                         sym::alias
                         | sym::cfg
+                        | sym::cfg_hide
                         | sym::hidden
                         | sym::html_favicon_url
                         | sym::html_logo_url