Mark await expressions as caught or uncaught

src/isolate.cc

Index: src/isolate.cc
diff --git a/src/isolate.cc b/src/isolate.cc
index c7b7486d1e6be0e650d1357e7ca9357efc445745..1b96583cb093cd44eb2022945e59b2a6bc185322 100644
--- a/src/isolate.cc
+++ b/src/isolate.cc
@@ -1311,6 +1311,8 @@ Isolate::CatchType Isolate::PredictExceptionCatcher() {
       JavaScriptFrame* js_frame = static_cast<JavaScriptFrame*>(frame);
       HandlerTable::CatchPrediction prediction = PredictException(js_frame);
       if (prediction == HandlerTable::DESUGARING) return CAUGHT_BY_DESUGARING;
+      if (prediction == HandlerTable::ASYNC_AWAIT) return CAUGHT_BY_ASYNC_AWAIT;
+      if (prediction == HandlerTable::PROMISE) return CAUGHT_BY_PROMISE;
       if (prediction != HandlerTable::UNCAUGHT) return CAUGHT_BY_JAVASCRIPT;
     }
 
@@ -1714,6 +1716,7 @@ Handle<Object> Isolate::GetPromiseOnStackOnThrow() {
   for (JavaScriptFrameIterator it(this); !it.done(); it.Advance()) {
     switch (PredictException(it.frame())) {
       case HandlerTable::UNCAUGHT:
+      case HandlerTable::ASYNC_AWAIT:
         break;
       case HandlerTable::CAUGHT:
       case HandlerTable::DESUGARING: