Error for OptionalKeys<T> & WritableKeys<T>

[iliubinskii]

🐞 Bug Report

Describe the bug

OptionalKeys<T> & WritableKeys<T> causes error - see code snippet below.

Reproduce the bug

export type OptionalToUndefined<T extends object> = {
  readonly [K in OptionalKeys<T> & ReadonlyKeys<T>]: T[K] | undefined;
} & {
  [K in OptionalKeys<T> & WritableKeys<T>]: T[K] | undefined;
} & {
  readonly [K in RequiredKeys<T> & ReadonlyKeys<T>]: T[K];
} & {
  [K in RequiredKeys<T> & WritableKeys<T>]: T[K];
};

Expected behavior

OptionalKeys separately can be used as a key.
WritableKeys separately can be used as a key.

So, their combination should also be usable.

Possible Solution

I use this as temporary solution

export type OptionalToUndefined<T extends object> = {
  readonly [K in OptionalKeys<T> & ReadonlyKeys<T>]: T[K] | undefined;
} & {
  [K in Exclude<OptionalKeys<T>, ReadonlyKeys<T>>]: T[K] | undefined;
} & {
  readonly [K in RequiredKeys<T> & ReadonlyKeys<T>]: T[K];
} & {
  [K in RequiredKeys<T> & WritableKeys<T>]: T[K];
};

Screenshots

Additional context

This error may depend on typescript configuration. If you can't reproduce I will upload reproduction repo.