[async-functions] support await expressions in finally statements

src/runtime/runtime-generator.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/factory.h"
 #include "src/frames-inl.h"
 #include "src/objects-inl.h"
@@ skipping 14 matching lines @@
   int size = function->shared()->bytecode_array()->register_count();
   Handle<FixedArray> register_file = isolate->factory()->NewFixedArray(size);
 
   Handle<JSGeneratorObject> generator =
       isolate->factory()->NewJSGeneratorObject(function);
   generator->set_function(*function);
   generator->set_context(isolate->context());
   generator->set_receiver(*receiver);
   generator->set_register_file(*register_file);
   generator->set_continuation(JSGeneratorObject::kGeneratorExecuting);
+  generator->set_resume_mode(JSGeneratorObject::kNext);
   return *generator;
 }
 
 RUNTIME_FUNCTION(Runtime_GeneratorClose) {
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
   generator->set_continuation(JSGeneratorObject::kGeneratorClosed);
 
@@ skipping 52 matching lines @@
   HandleScope scope(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_HANDLE_CHECKED(JSGeneratorObject, generator, 0);
 
   if (!generator->is_suspended()) return isolate->heap()->undefined_value();
   return Smi::FromInt(generator->source_position());
 }
 
 }  // namespace internal
 }  // namespace v8