From 5ae48b06e156b4c8e83d4888f982f038232c044f Mon Sep 17 00:00:00 2001
From: Dan Gohman <sunfish@mozilla.com>
Date: Thu, 29 Nov 2018 06:22:39 -0800
Subject: [PATCH] Fix the pthread_detach assert on Darwin.

---
 lib/execute/signalhandlers/SignalHandlers.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/execute/signalhandlers/SignalHandlers.cpp b/lib/execute/signalhandlers/SignalHandlers.cpp
index 71ba9c3a02..f47d7ec7f9 100644
--- a/lib/execute/signalhandlers/SignalHandlers.cpp
+++ b/lib/execute/signalhandlers/SignalHandlers.cpp
@@ -772,7 +772,7 @@ EnsureDarwinMachPorts()
         return false;
     }
     r = pthread_detach(handlerThread);
-    assert(r != 0);
+    assert(r == 0);
 
     // In addition to the process-wide signal handler setup, OSX needs each
     // thread configured to send its exceptions to sMachDebugPort. While there