From 851b3e32bd1dd224889de12a87fa57bab091346a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Sun, 8 Oct 2017 12:54:29 +0200
Subject: [PATCH] style: allow re-initializing thread_state as long as it's
 with the same value.

This unbusts running multiple rule-tree benchmarks at the same time.
---
 components/style/thread_state.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/components/style/thread_state.rs b/components/style/thread_state.rs
index 894cdb4a813..d06f47aabe4 100644
--- a/components/style/thread_state.rs
+++ b/components/style/thread_state.rs
@@ -53,7 +53,9 @@ thread_local!(static STATE: RefCell<Option<ThreadState>> = RefCell::new(None));
 pub fn initialize(x: ThreadState) {
     STATE.with(|ref k| {
         if let Some(ref s) = *k.borrow() {
-            panic!("Thread state already initialized as {:?}", s);
+            if x != *s {
+                panic!("Thread state already initialized as {:?}", s);
+            }
         }
         *k.borrow_mut() = Some(x);
     });