Property '_internal' does not exist on type...

[Emanuele-Fortunati]

Description

ai: 4.1.17
typescript: 5.7.3
tsconfig.json:

{
  "compilerOptions": {
    "outDir": "./dist",
    "module": "CommonJS",
    "target": "ES2022",
    "strict": true,
    "sourceMap": false,
    "allowJs": true,
    "esModuleInterop": true
  },
  "include": ["**/*.ts"],
  "exclude": ["node_modules", "dist", "index.old.ts"]
}

If I try to compile with tsc, I get lot of the following errors:

Property '_internal' does not exist on type '{ chunks: T[]; initialDelayInMs?: number; chunkDelayInMs?: number; }'

Any idea why?

Code example

import { CoreMessage, generateText } from 'ai';

let { text } = await generateText({
    model: openai(configuration.openAI.model),
    messages,
    temperature: 0.2,
});

AI provider

No response

Additional context

No response

[shaper]

Thank you for reporting -- we are looking at a potential revert of #4561 to resolve this shortly.

[shaper]

@Emanuele-Fortunati are you perhaps able to put up a small example repo? It would be helpful for us to be able to reproduce the failure, so that if we look to reland an updated version of the change we can avoid breaking you or others again.

I tried updating a small nextjs app to ai 4.1.17 and it builds with typescript 5.7.3 although admittedly a slightly different tsconfig.

Apologies for the hassle, we are looking to revert in the meantime in any case.

[Emanuele-Fortunati]

@Emanuele-Fortunati are you perhaps able to put up a small example repo? It would be helpful for us to be able to reproduce the failure, so that if we look to reland an updated version of the change we can avoid breaking you or others again.

I tried updating a small nextjs app to ai 4.1.17 and it builds with typescript 5.7.3 although admittedly a slightly different tsconfig.

Apologies for the hassle, we are looking to revert in the meantime in any case.

Hello, thanks for the support.
I'm travelling this week so it's a bit hard to put up a small repo, I'll do next week for sure.
(unfortunately I cannot share the full code as it belongs to a client of mine)