bitburner-src/src/utils/Protections.ts

// This file is imported for side effects only.
/* Prevent inadvertantly redefining certain window properties,
   which are known to cause unrecoverable game errors when redefined.
   The player is able to redefine these properties as writable if desired. */
Object.defineProperties(window, {
  Number: { writable: false },
  Object: { writable: false },
  String: { writable: false },
});