1060068 - ES6 Proxies: Object.freeze() calls [[GetProperty]] too many times.

Status: RESOLVED DUPLICATE of bug 1125437

(Core :: JavaScript: Standard Library, defect)

Description

[Eric Faust [:efaust]]

var getDescCalled = 0;

function getOwnPropertyDescriptor(target, P) {
    assertEq(++getDescCalled, 1); 
    return Object.getOwnPropertyDescriptor(target, P); 
}

var handler = { getOwnPropertyDescriptor };

var p = new Proxy({foo : 5}, handler);

Object.freeze(p);

asserts. The trouble comes from the getGenericAttributes and setGenericAttributes() setup in JSObject::sealOrFreeze.

Comment 1

[Tom S [:evilpie]]

Fixed in bug 1125437. It also includes a test that makes sure we call only the right traps on the Proxy. (Eric's test here passes)