Don't get the TLS for invalid TLS indexes. This...

base/thread_local_storage_win.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/thread_local_storage.h"
 
 #include <windows.h>
 
 #include "base/logging.h"
 
@@ skipping 82 matching lines @@
 
 void ThreadLocalStorage::Slot::Set(void* value) {
   void** tls_data = static_cast<void**>(TlsGetValue(tls_key_));
   if (!tls_data)
     tls_data = ThreadLocalStorage::Initialize();
   DCHECK(slot_ >= 0 && slot_ < kThreadLocalStorageSize);
   tls_data[slot_] = value;
 }
 
 void ThreadLocalStorage::ThreadExit() {
+  if (tls_key_ == TLS_OUT_OF_INDEXES)
+    return;
+
   void** tls_data = static_cast<void**>(TlsGetValue(tls_key_));
 
   // Maybe we have never initialized TLS for this thread.
   if (!tls_data)
     return;
 
   for (int slot = 0; slot < tls_max_; slot++) {
     if (tls_destructors_[slot] != NULL) {
       void* value = tls_data[slot];
       tls_destructors_[slot](value);
@@ skipping 62 matching lines @@
 #else  // _WIN64
 
 #pragma data_seg(".CRT$XLB")
 PIMAGE_TLS_CALLBACK p_thread_callback = OnThreadExit;
 
 // Reset the default section.
 #pragma data_seg()
 
 #endif  // _WIN64