From 941a161781d1238a3264ef9ef7edbfa07d0741fb Mon Sep 17 00:00:00 2001
From: Brian Hackett <bhackett1024@gmail.com>
Date: Thu, 13 Dec 2012 15:27:07 -0700
Subject: [PATCH] Bug 821216 - Don't trigger off thread compilation with no
 threads available, r=dvander.

---
 js/src/jsworkers.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/src/jsworkers.cpp b/js/src/jsworkers.cpp
index 59e70b27a05..34bc6ef78b1 100644
--- a/js/src/jsworkers.cpp
+++ b/js/src/jsworkers.cpp
@@ -20,7 +20,7 @@ using mozilla::DebugOnly;
 bool
 js::OffThreadCompilationAvailable(JSContext *cx)
 {
-    return cx->runtime->useHelperThreads();
+    return cx->runtime->useHelperThreads() && cx->runtime->helperThreadCount() > 0;
 }
 
 bool