Unbreak NaCL build

src/objects.cc

 // Copyright 2013 the V8 project 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 "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/allocation-site-scopes.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 6618 matching lines @@
   uint32_t index = 0;
   bool is_element = name->AsArrayIndex(&index);
 
   Handle<Object> old_value = isolate->factory()->the_hole_value();
   bool is_observed = object->map()->is_observed() &&
                      *name != isolate->heap()->hidden_string();
   bool preexists = false;
   if (is_observed) {
     if (is_element) {
       Maybe<bool> maybe = HasOwnElement(object, index);
-      ASSERT(maybe.has_value);
+      // Workaround for a GCC 4.4.3 bug which leads to "‘preexists’ may be used
+      // uninitialized in this function".
+      if (!maybe.has_value) {
+        ASSERT(false);
+        return isolate->factory()->undefined_value();
+      }
       preexists = maybe.value;
       if (preexists && GetOwnElementAccessorPair(object, index).is_null()) {
         old_value =
             Object::GetElement(isolate, object, index).ToHandleChecked();
       }
     } else {
       LookupResult lookup(isolate);
       object->LookupOwn(name, &lookup, true);
       preexists = lookup.IsProperty();
       if (preexists && lookup.IsDataProperty()) {
@@ skipping 10314 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal