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> ```ts type DeepReadonly = T extends (...arg: any) => any ? T : { readonly [R in keyof T]: DeepReadonly }; ```

``` ts type MyAwaited = T extends PromiseLike?MyAwaited:T ```

```ts type Concat = U extends readonly any[]?[...T,...U]:[...T,U] ```

### Describe the bug Although #9053 claims this issue was resolved, I believe it remains unresolved. The mentioned PR #9042 in this issue is only a solution for TS resolve...