779682 - ES5 strict mode: no assignment to property of primitive (mostly)

Status: RESOLVED DUPLICATE of bug 603201

(Core :: JavaScript Engine, defect)

Description

[Jason Orendorff [:jorendorff]]

"use strict";
  "s".x = 3;  // should throw TypeError

Instead, it passes silently.

See http://people.mozilla.org/~jorendorff/es5.html#sec-8.7.2
Step 7 of the special [[Put]] internal method says:
> 7. Else, this is a request to create an own property on the transient object O
>    a. If Throw is true, then throw a TypeError exception.

Originally filed against JSCore, which gets it right :)
  https://bugs.webkit.org/show_bug.cgi?id=92817

See also bug 603201 in this general area.

Comment 1

[Tom S. (please needinfo tschuster)]

bug 603201 will make this throw, sadly this is also the case that breaks b2g test.