`$extends` TS error: "Inferred type of this node exceeds the maximum length the compiler will serialize" with `"declaration": true` in `tsconfig`

The inferred type of this node exceeds the maximum length the compiler will serialize. An explicit type annotation is needed.

This error also showed up in another project.

Source file. To reproduce, check out main, and upgrade to Prisma 4.7

[aqrln]

Hi @mshd and thank you for your report! This error is related to failure to emit declarations — notice that despite the error, if you hover the mouse over the variable in your editor, you can still see that TypeScript infers a type. Adding

"compilerOptions": {
  "declaration": false
}

to tsconfig.json prevents the issue, so this is the workaround for now. We will work on investigating and fixing the root cause, as of course the functionality should work regardless of this compiler option. Thanks for bringing this to our attention.

[mshd]

@millsp I think it’s only related to declaration: true. @aqrln Thanks so much, this solved it for now. @miguelff By using your repro.zip and adding declaration: true in tsconfig.json, you can reproduce the error.