Exception Handling for streamObject toTextStreamResponse

[DavidMelnychuk]

Feature Description

Following the object generation docs, and setting up streamObject on a bun server:

  const context = await req.json();

  const model = azure('azure-gpt-4o-mini');
  const result = streamObject({
    model,
    schema: notificationSchema,
    prompt:
      `Generate 3 notifications for a messages app in this context:` + context,
  });

  return result.toTextStreamResponse();

If the stream encounters an error, then it throws an unhandledRejection and crashes the entire server. For example if it hits an API Call error like content filtering:

 error: unhandledRejection: The response was filtered due to the prompt triggering Azure OpenAI's content management policy. Please modify your prompt and retry.
AI_APICallError: The response was filtered due to the prompt triggering Azure OpenAI's content management policy. Please modify your prompt and retry.

Not sure if possible with streams, but better exception handling such that errors gets caught in a try/catch or we can provide an onError callback would be greatly appreciated.

Use Cases

No response

Additional context

No response

[lgrammel]

Fixed by #4807