[Flight] Revert Emit Infinite Promise as a Halted Row (facebook#30746)

This reverts commit 52c9c43.

Author: sebmarkbage

packages/react-client/src/ReactFlightClient.js

@@ -46,6 +46,7 @@ import {
   enableRefAsProp,
   enableFlightReadableStream,
   enableOwnerStacks,
+  enableHalt,
 } from 'shared/ReactFeatureFlags';
 
 import {
@@ -1193,6 +1194,10 @@ function parseModelString(
       }
       case '@': {
         // Promise
+        if (value.length === 2) {
+          // Infinite promise that never resolves.
+          return new Promise(() => {});
+        }
         const id = parseInt(value.slice(2), 16);
         const chunk = getChunk(response, id);
         return chunk;
@@ -2633,8 +2638,10 @@ function processFullStringRow(
     }
     // Fallthrough
     case 35 /* "#" */: {
-      resolveBlocked(response, id);
-      return;
+      if (enableHalt) {
+        resolveBlocked(response, id);
+        return;
+      }
     }
     // Fallthrough
     default: /* """ "{" "[" "t" "f" "n" "0" - "9" */ {

packages/react-client/src/__tests__/ReactFlight-test.js

@@ -3026,7 +3026,6 @@ describe('ReactFlight', () => {
 
     const promise = mockConsoleLog.mock.calls[0][1].promise;
     expect(promise).toBeInstanceOf(Promise);
-    expect(promise.status).toBe('blocked');
 
     expect(ownerStacks).toEqual(['\n    in App (at **)']);
   });

packages/react-server/src/ReactFlightServer.js

@@ -1817,6 +1817,10 @@ function serializeLazyID(id: number): string {
   return '$L' + id.toString(16);
 }
 
+function serializeInfinitePromise(): string {
+  return '$@';
+}
+
 function serializePromiseID(id: number): string {
   return '$@' + id.toString(16);
 }
@@ -3269,10 +3273,7 @@ function renderConsoleValue(
       }
       // If it hasn't already resolved (and been instrumented) we just encode an infinite
       // promise that will never resolve.
-      request.pendingChunks++;
-      const blockedId = request.nextChunkId++;
-      emitBlockedChunk(request, blockedId);
-      return serializePromiseID(blockedId);
+      return serializeInfinitePromise();
     }
 
     if (existingReference !== undefined) {