From 98c71c36d693c5643309baaa06eea70015c01029 Mon Sep 17 00:00:00 2001
From: varkor <github@varkor.com>
Date: Thu, 18 Apr 2019 20:57:15 +0100
Subject: Check async in trait methods

---
 src/libsyntax/feature_gate.rs | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/libsyntax')

diff --git a/src/libsyntax/feature_gate.rs b/src/libsyntax/feature_gate.rs
index 30a603ac3bd..bc87a88f9f1 100644
--- a/src/libsyntax/feature_gate.rs
+++ b/src/libsyntax/feature_gate.rs
@@ -2068,6 +2068,9 @@ impl<'a> Visitor<'a> for PostExpansionVisitor<'a> {
                 if block.is_none() {
                     self.check_abi(sig.header.abi, ti.span);
                 }
+                if sig.header.asyncness.node.is_async() {
+                    gate_feature_post!(&self, async_await, ti.span, "async fn is unstable");
+                }
                 if sig.decl.c_variadic {
                     gate_feature_post!(&self, c_variadic, ti.span,
                                        "C-variadic functions are unstable");
-- 
cgit 1.4.1-3-g733a5