add third argument to addPath

Author: robrichard

src/execution/execute.js

@@ -932,7 +932,7 @@ function completeAsyncIteratorValue(
   completedResults: Array<mixed>,
   iterator: AsyncIterator<mixed>,
 ): Promise<$ReadOnlyArray<mixed>> {
-  const fieldPath = addPath(path, index);
+  const fieldPath = addPath(path, index, undefined);
   return iterator.next().then(
     ({ value, done }) => {
       if (done) {