Hoist up

Author: eps1lon

packages/react-server/src/ReactFlightServer.js

@@ -3926,18 +3926,8 @@ function emitChunk(
     return;
   }
   // For anything else we need to try to serialize it using JSON.
-  // We stash the outer parent size so we can restore it when we exit.
-  const parentSerializedSize = serializedSize;
-  // We don't reset the serialized size counter from reentry because that indicates that we
-  // are outlining a model and we actually want to include that size into the parent since
-  // it will still block the parent row. It only restores to zero at the top of the stack.
-  try {
-    // $FlowFixMe[incompatible-type] stringify can return null for undefined but we never do
-    const json: string = stringify(value, task.toJSON);
-    emitModelChunk(request, task.id, json);
-  } finally {
-    serializedSize = parentSerializedSize;
-  }
+  const json: string = stringify(value, task.toJSON);
+  emitModelChunk(request, task.id, json);
 }
 
 function erroredTask(request: Request, task: Task, error: mixed): void {
@@ -3975,8 +3965,11 @@ function retryTask(request: Request, task: Task): void {
   const prevDebugID = debugID;
   task.status = RENDERING;
 
-  // Stash and restore original size e.g. for when we're retrying strings.
+  // We stash the outer parent size so we can restore it when we exit.
   const parentSerializedSize = serializedSize;
+  // We don't reset the serialized size counter from reentry because that indicates that we
+  // are outlining a model and we actually want to include that size into the parent since
+  // it will still block the parent row. It only restores to zero at the top of the stack.
   try {
     // Track the root so we know that we have to emit this object even though it
     // already has an ID. This is needed because we might see this object twice
@@ -4101,9 +4094,11 @@ function tryStreamTask(request: Request, task: Task): void {
     // so that we instead outline the row to get a new debugID if needed.
     debugID = null;
   }
+  const parentSerializedSize = serializedSize;
   try {
     emitChunk(request, task, task.model);
   } finally {
+    serializedSize = parentSerializedSize;
     if (__DEV__) {
       debugID = prevDebugID;
     }