vm runInContext NaN, Infinity, undefined property descriptor inconsistent with global

[Fetz]

• Version: v.9.5.0
• Platform: Mac 10.11.6 (15G18013)
• Subsystem: vm

var sandbox = vm.createContext({});
Object.getOwnPropertyDescriptor(vm.runInContext("this", sandbox), "NaN");
{ value: NaN,
  writable: true,
  enumerable: false,
  configurable: true }

Is this behaviour expected? Because is not consistent with the global object.

> Object.getOwnPropertyDescriptor(global, "NaN")
{ value: NaN,
  writable: false,
  enumerable: false,
  configurable: false }

And the behaviour is not consistent with the previous version of Node

• Version: v.8.5.0
• Platform: Mac 10.11.6 (15G18013)
• Subsystem: vm

var sandbox = vm.createContext({});
Object.getOwnPropertyDescriptor(vm.runInContext("this", sandbox), "NaN");
{ value: NaN,
  writable: false,
  enumerable: false,
  configurable: false }

I noticed this bug when working on this jsdom PR

[TimothyGu]

Seems to be a duplicate of #14660, another long-standing issue...

[TimothyGu]

Actually, #17481 is more appropriate. All of these vm issues overlap greatly, so it can be difficult to figure out what exact issue a specific issue is equivalent to.