From e4e7eb2d5891ceb9241f769540dd413e90020971 Mon Sep 17 00:00:00 2001
From: Vadim Petrochenkov <vadim.petrochenkov@gmail.com>
Date: Sun, 30 Jun 2019 13:00:45 +0300
Subject: Feature gate `rustc` attributes harder

---
 src/libsyntax/feature_gate.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/libsyntax/feature_gate.rs')

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 9aea995831e..6037b06eaf2 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -1669,6 +1669,14 @@ impl<'a> Context<'a> {
             }
             debug!("check_attribute: {:?} is builtin, {:?}, {:?}", attr.path, ty, gateage);
             return;
+        } else {
+            for segment in &attr.path.segments {
+                if segment.ident.as_str().starts_with("rustc") {
+                    let msg = "attributes starting with `rustc` are \
+                               reserved for use by the `rustc` compiler";
+                    gate_feature!(self, rustc_attrs, segment.ident.span, msg);
+                }
+            }
         }
         for &(n, ty) in self.plugin_attributes {
             if attr.path == n {
-- 
cgit 1.4.1-3-g733a5