Object.freezing proxies should freeze or throw?

[Claude Pache]

> Le 9 août 2016 à 18:58, Raul-Sebastian Mihăilă <raul.mihaila at gmail.com> a écrit :
> 
> Claude, I don't see how non-extensibility and deleting properties are connected.
> 

The issue is not deleting per se. The issue is that a property appears to be non-existent (because successfully deleted), and later existent again, which should not be allowed on non-extensible objects.

—Claude

> 
> ```js
> var target = Object.preventExtensions({ x: 1 })
> var proxy = new Proxy(target, {
>     deleteProperty() { return true }
> })
> 
> Object.isExtensible(proxy) // false
> delete proxy.x // true
> proxy.hasOwnProperty('x') // true
> ```
> 
> 
> 

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