From 6be2857a6cc551f63cd79d9d59322fbb2ce9103d Mon Sep 17 00:00:00 2001
From: Mark Rousskov <mark.simulacrum@gmail.com>
Date: Sat, 10 Aug 2019 16:19:25 -0400
Subject: [PATCH] Replace Arc with Rc around external_traits

---
 src/librustdoc/clean/mod.rs | 2 +-
 src/librustdoc/core.rs      | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/librustdoc/clean/mod.rs b/src/librustdoc/clean/mod.rs
index ee76bf35cab..af4fe62bcbc 100644
--- a/src/librustdoc/clean/mod.rs
+++ b/src/librustdoc/clean/mod.rs
@@ -131,7 +131,7 @@ pub struct Crate {
     pub primitives: Vec<(DefId, PrimitiveType, Attributes)>,
     // These are later on moved into `CACHEKEY`, leaving the map empty.
     // Only here so that they can be filtered through the rustdoc passes.
-    pub external_traits: Arc<RefCell<FxHashMap<DefId, Trait>>>,
+    pub external_traits: Rc<RefCell<FxHashMap<DefId, Trait>>>,
     pub masked_crates: FxHashSet<CrateNum>,
 }
 
diff --git a/src/librustdoc/core.rs b/src/librustdoc/core.rs
index 6b524e1206f..a14ddc706d5 100644
--- a/src/librustdoc/core.rs
+++ b/src/librustdoc/core.rs
@@ -26,7 +26,6 @@
 use std::cell::RefCell;
 use std::mem;
 use rustc_data_structures::sync::{self, Lrc};
-use std::sync::Arc;
 use std::rc::Rc;
 
 use crate::config::{Options as RustdocOptions, RenderOptions};
@@ -49,7 +48,7 @@ pub struct DocContext<'tcx> {
     /// Later on moved into `html::render::CACHE_KEY`
     pub renderinfo: RefCell<RenderInfo>,
     /// Later on moved through `clean::Crate` into `html::render::CACHE_KEY`
-    pub external_traits: Arc<RefCell<FxHashMap<DefId, clean::Trait>>>,
+    pub external_traits: Rc<RefCell<FxHashMap<DefId, clean::Trait>>>,
     /// Used while populating `external_traits` to ensure we don't process the same trait twice at
     /// the same time.
     pub active_extern_traits: RefCell<Vec<DefId>>,
-- 
2.44.0