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
<body>
            <Suspense fallback={'loading...'}>
              <AsyncText text="Hello" />
            </Suspense>
          </body>
        </html>,
        {
          unstable_externalRuntimeSrc: 'src-of-external-runtime',
        },
      );
      pipe(writable);
    });
    
    
    
    expect(
      Array.from(document.head.getElementsByTagName('script')).map(
        n => n.outerHTML,
      ),
    ).toEqual(['<script src="src-of-external-runtime" async=""></script>']);
    expect(getVisibleChildren(document)).toEqual(
      <html>
        <head />
        <body>loading...</body>
      </html>,
    );
  });
  
  it('does not send script tags for SSR instructions when using the external runtime', async () => {
    function App() {