Object with null prototype does not extend interface {} about flow

[SamChou19815]

Unfortunately, I don't think this is something we want to support. Some existing code might already rely on this behavior, which I think is legit: https://flow.org/try#1N4Igxg9gdgZglgcxALlAIwIZoKYBsD6uEEAztvhgE6UYCe+JADpdhgCYowa5kA0I2KAFcAtiRQAXSkOz9sADwxgJ+NPTbYuQ3BMnTZA+Y2yU4IwRO4A6SFBIrGVDGM7c+IFkolXpUCWewUEAwhCQgRDH8wEH4hMnwROHlsNnw4KHwwSLAAC3wANyo4LFxscWQuHgMNZmwsiRSAWglaY1cq-hIAa2wJXNpG4Vxcdvdu3v7B0RxKUYMhKDBSqmbWwIq3eagoOrKSKgH0wtMMPznY7d2SfcoBiEZ-aG5G3Ix085AF-ZhsRoRehqUEiNMgSQHlSruBZxJrMcJwMhzAC+-EgGiCGiWVGwAAJbPYcTBiMgcelAVwwLjgEiANwAHVgxCsYQAylJ0ggABQASnpUBiIHyJhIcGgQXyAAYrAAmWVWCUgJFAA

We generally don't support prototype stuff well, and would recommend against using prototype stuff.

[SamChou19815]

Not a solution yet, but just an observation to help future me revisit the issue. The fundamental reason is that proto of interface {} is Object.prototype: https://flow.org/try/#1N4Igxg9gdgZglgcxALlAIwIZoKYBsD6uEEAztvhgE6UYCe+JADpdhgCYowa5kA0I2KAFcAtiRQAXSkOz9sADwxgJ+NPTbYuQ3BMnTZA+Y2yU4IwRO4A6SFBIrGVDGM7c+IFkolXpUCWewUEAwhCQgRDH8wEH4hMnwROHlsNnw4KHwwSLAAC3wANyo4LFxscWQuHgMNZmwsiRSAWglaY1cq-hIAa2wJXNpG4Vxcdvdu3v7B0RxKUYMhKDBSqmbWwIq3eagoOrKSKgH0wtMMPznY7d2SfcoBiEZ-aG5G3Ix085AF-ZhsRoRehqUEiNMgSQHlSruBZxJrMcJwMhzAC+-EgGiCLWMAAIAHLaXAABUoEDCWIAvFjgPh8HCwtTkFihrgkQBuAA6UA0Syo2Cxxyx8gZeOGRJJEHZUA5AApBVj0oCuGBecAkQBKCWY3kAQXJWKl8pMiuVaoA2gByam0iDUs0AXQlMRA+RMJDg0CC+QADFYAEx+qyekBIoA

[mwiencek]

OK, thanks for considering it, at least.