`Object.Paths` not produced error with optional sub props.

[ozum]

Hi,

I would like to report a bug.

🐞 Bug Report

Describe the bug

Object.Paths does not produce an error if optional properties exist in sub properties.

Reproduce the bug

import { Object } from 'ts-toolbelt'

export interface LineItem {
  modifications: Record<string, {rate?: number; amount?: number}>
}

export interface Mandatory {
  modifications: Record<string, {rate: number; amount: number}>
}

export function useVModel<PROPS extends object, PATH extends Object.Paths<PROPS>>(
  props: PROPS,
  path: PATH,
): any {}

export function useLineItem(
  lineItem: LineItem,
  mandatory: Mandatory,
): any {
  useVModel(lineItem, ['XXXXXXX']) // First Call
  useVModel(mandatory, ['XXXXXXX']) // Second Call
}

Expected behavior

Both calls should produce errors.

What happens

The first call does not produce an error, whereas the second call produces an error.

Screenshots

Additional context

"ts-toolbelt": 9.6.0 "typescript": 4.2.3 "node": 15.8.0

[millsp]

Thanks for reporting this

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[yannickpschroeder]

Any updates on this issue?