As reported in https://github.com/vercel/next.js/issues/56919 it is possible for the ReadableStream controller to be written to after it is already closed. This is because inside an async context a Float method such as `ReactDOM.preload()` can attempt to flush newly created Resources even after the stream has completed.

React version: 

The underlying bug has been in React since Float landed. The expression of the Bug as reported in the Next.js repo was landed in: https://github.com/facebook/react/commit/701ac2e57290f913502c6012c15e815f412f84b7
The first Canary release to have this new expression was: [18.3.0-canary-f81c0f1ed-20230927](https://www.npmjs.com/package/react-dom/v/18.3.0-canary-f81c0f1ed-20230927)


## Steps To Reproduce

1. use `react-dom/server.edge`
2. Ensure the environment supports AsyncLocalStorage
3. Call Float method like `ReactDOM.preload(...)` after an await after the stream has closed

## The current behavior
If the conditions are right the Float call will initiate a write after the stream has closed and there will be a thrown exception

## The expected behavior
The Float call is ignored after the stream has closed. There are no errors
} finally {
      someTask.keyPath = prevKeyPath;
    }
    return;
  }
  
  const task: RenderTask = someTask;
  pushBuiltInComponentStackInDEV(task, 'Suspense');
  const prevKeyPath = task.keyPath;
  const parentBoundary = task.blockedBoundary;
  const parentSegment = task.blockedSegment;
  
  
  
  
  const fallback: ReactNodeList = props.fallback;
  const content: ReactNodeList = props.children;
  const fallbackAbortSet: Set<Task> = new Set();
  const newBoundary = createSuspenseBoundary(request, fallbackAbortSet);
  if (request.trackedPostpones !== null) {
    newBoundary.trackedContentKeyPath = keyPath;
  }
  const insertionIndex = parentSegment.chunks.length;
   The children of the boundary segment is actually the fallback.
  const boundarySegment = createPendingSegment(
    request,
    insertionIndex,
    newBoundary,
    task.formatContext,
     boundaries never require text embedding at their edges because comment nodes bound them