From b681433b9d40ce1d851d22bedb7ccb483bedda06 Mon Sep 17 00:00:00 2001
From: Oliver Scherer <github35764891676564198441@oli-obk.de>
Date: Thu, 7 Feb 2019 14:19:06 +0100
Subject: Use `Rc<[Symbol]>` instead of `Vec<Symbol>` to reduce # of allocs

---
 src/librustc_allocator/expand.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'src/librustc_allocator')

diff --git a/src/librustc_allocator/expand.rs b/src/librustc_allocator/expand.rs
index b877c80af1a..758a0d63886 100644
--- a/src/librustc_allocator/expand.rs
+++ b/src/librustc_allocator/expand.rs
@@ -91,9 +91,9 @@ impl MutVisitor for ExpandAllocatorDirectives<'_> {
             call_site: item.span, // use the call site of the static
             def_site: None,
             format: MacroAttribute(Symbol::intern(name)),
-            allow_internal_unstable: vec![
+            allow_internal_unstable: Some(vec![
                 Symbol::intern("rustc_attrs"),
-            ],
+            ].into()),
             allow_internal_unsafe: false,
             local_inner_macros: false,
             edition: hygiene::default_edition(),
-- 
cgit 1.4.1-3-g733a5