Support spread in recursive object inference #64531

🔎 Search Terms

recursive object literal getter accessor spread "implicitly has type 'any'" 64311

🕗 Version & Regression Information

• Tested on 7.1.0-dev.20260929.1. Not a regression. The same declaration without the spread infers since Suppress type argument constraint checks in recursive call resolution #64311.

⏯ Playground Link

No response

💻 Code

interface Schema<O> { readonly out: O }
type Shape = Record<string, Schema<any>>;
declare function object<S extends Shape>(shape: S): Schema<{ [K in keyof S]: S[K]["out"] }>;
declare function array<T extends Schema<any>>(el: T): Schema<T["out"][]>;
declare function string(): Schema<string>;

// works since #64311
const A = object({
  name: string(),
  get children() { return array(A); },
});

// fails
const base = { name: string() };
const B = object({
  ...base,
  get children() { return array(B); },
});

🙁 Actual behavior

B is any, with TS7022 on B and TS7023 on children. A is the same declaration without the spread and infers Schema<{ name: string; readonly children: ...[] }>.

🙂 Expected behavior

B infers the same type as A.

Additional information about the issue

Spreading a shape is how Zod's docs extend an object schema, so right now a schema can't be both extended and recursive:

const Node = z.object({
  ...Base.shape,
  get children() { return z.array(Node); },
});