1 files changed, 6 insertions, 1 deletions
diff --git a/Source/WTF/wtf/ThreadIdentifierDataPthreads.cpp b/Source/WTF/wtf/ThreadIdentifierDataPthreads.cpp
index bd62288f8..0bebfe93b 100644
--- a/Source/WTF/wtf/ThreadIdentifierDataPthreads.cpp
+++ b/Source/WTF/wtf/ThreadIdentifierDataPthreads.cpp
@@ -56,7 +56,8 @@ ThreadIdentifierData::~ThreadIdentifierData()
 
 void ThreadIdentifierData::initializeOnce()
 {
-    if (pthread_key_create(&m_key, destruct))
+    int error = pthread_key_create(&m_key, destruct);
+    if (error)
         CRASH();
 }
 
@@ -71,6 +72,10 @@ ThreadIdentifier ThreadIdentifierData::identifier()
 void ThreadIdentifierData::initialize(ThreadIdentifier id)
 {
     ASSERT(!identifier());
+    // Ideally we'd have this as a release assert everywhere, but that would hurt performane.
+    // Having this release assert here means that we will catch "didn't call
+    // WTF::initializeThreading() soon enough" bugs in release mode.
+    RELEASE_ASSERT(m_key != PTHREAD_KEYS_MAX);
     pthread_setspecific(m_key, new ThreadIdentifierData(id));
 }