1268812 - "let" variable used in "for of" not scoped to individual loops

Status: RESOLVED DUPLICATE of bug 449811

(Core :: JavaScript Engine, defect)

Description

[alancutter]

User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.22 Safari/537.36

Steps to reproduce:

Firefox Nightly: 49.0a1 (2016-04-25)
OS: Linux

Test case: https://jsfiddle.net/pkyce3uw/
let xs = ['P', 'A', 'S', 'S'];
let fs = [];
for (let x of xs) {
	fs.push(() => document.body.textContent += x);
}
for (let f of fs) {
	f();
}

This test passes in Chrome.


Actual results:

SSSS


Expected results:

PASS