From 8380539ecb88fba56a8fc0812df6fa52acab4123 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20K=C3=A5re=20Alsaker?= <john.kare.alsaker@gmail.com>
Date: Sun, 1 Apr 2018 08:21:49 +0200
Subject: [PATCH] Make sure Session.next_node_id is only used on one thread

---
 src/librustc/session/mod.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/librustc/session/mod.rs b/src/librustc/session/mod.rs
index 96f41d55454e..81012754a771 100644
--- a/src/librustc/session/mod.rs
+++ b/src/librustc/session/mod.rs
@@ -141,7 +141,7 @@ pub struct Session {
     /// Data about code being compiled, gathered during compilation.
     pub code_stats: Lock<CodeStats>,
 
-    next_node_id: Cell<ast::NodeId>,
+    next_node_id: OneThread<Cell<ast::NodeId>>,
 
     /// If -zfuel=crate=n is specified, Some(crate).
     optimization_fuel_crate: Option<String>,
@@ -1107,7 +1107,7 @@ pub fn build_session_(
         type_length_limit: Once::new(),
         const_eval_stack_frame_limit: 100,
         const_eval_step_limit: 1_000_000,
-        next_node_id: Cell::new(NodeId::new(1)),
+        next_node_id: OneThread::new(Cell::new(NodeId::new(1))),
         injected_allocator: Cell::new(None),
         allocator_kind: Cell::new(None),
         injected_panic_runtime: Cell::new(None),