Report promise reject with no handler (behind a flag).

src/messages.cc

 // Copyright 2011 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/api.h"
 #include "src/execution.h"
 #include "src/heap/spaces-inl.h"
 #include "src/messages.h"
@@ skipping 16 matching lines @@
     SmartArrayPointer<char> data_str;
     if (data->IsString())
       data_str = Handle<String>::cast(data)->ToCString(DISALLOW_NULLS);
     PrintF("%s:%i: %s\n", data_str.get() ? data_str.get() : "<unknown>",
            loc->start_pos(), str.get());
   }
 }
 
 
 Handle<JSMessageObject> MessageHandler::MakeMessageObject(
-    Isolate* isolate,
-    const char* type,
-    MessageLocation* loc,
-    Vector< Handle<Object> > args,
+    Isolate* isolate, const char* type, MessageLocation* loc,
+    Vector<Handle<Object> > args, Handle<JSObject> promise,
     Handle<JSArray> stack_frames) {
   Factory* factory = isolate->factory();
   Handle<String> type_handle = factory->InternalizeUtf8String(type);
   Handle<FixedArray> arguments_elements =
       factory->NewFixedArray(args.length());
   for (int i = 0; i < args.length(); i++) {
     arguments_elements->set(i, *args[i]);
   }
   Handle<JSArray> arguments_handle =
       factory->NewJSArrayWithElements(arguments_elements);
 
   int start = 0;
   int end = 0;
   Handle<Object> script_handle = factory->undefined_value();
   if (loc) {
     start = loc->start_pos();
     end = loc->end_pos();
     script_handle = Script::GetWrapper(loc->script());
   }
 
   Handle<Object> stack_frames_handle = stack_frames.is_null()
       ? Handle<Object>::cast(factory->undefined_value())
       : Handle<Object>::cast(stack_frames);
 
-  Handle<JSMessageObject> message =
-      factory->NewJSMessageObject(type_handle,
-                                  arguments_handle,
-                                  start,
-                                  end,
-                                  script_handle,
-                                  stack_frames_handle);
+  Handle<Object> promise_handle =
+      promise.is_null() ? Handle<Object>::cast(factory->undefined_value())
+                        : Handle<Object>::cast(promise);
+
+  Handle<JSMessageObject> message = factory->NewJSMessageObject(
+      type_handle, arguments_handle, promise_handle, start, end, script_handle,
+      stack_frames_handle);
 
   return message;
 }
 
 
 void MessageHandler::ReportMessage(Isolate* isolate,
                                    MessageLocation* loc,
                                    Handle<Object> message) {
   // We are calling into embedder's code which can throw exceptions.
   // Thus we need to save current exception state, reset it to the clean one
@@ skipping 74 matching lines @@
 
 SmartArrayPointer<char> MessageHandler::GetLocalizedMessage(
     Isolate* isolate,
     Handle<Object> data) {
   HandleScope scope(isolate);
   return GetMessage(isolate, data)->ToCString(DISALLOW_NULLS);
 }
 
 
 } }  // namespace v8::internal