Bug 185625 – Array#indexOf not finding items in array like objects with .length >= 2 ** 32

• Status: RESOLVED
• Resolution: DUPLICATE
• Component: JavaScriptCore

[Leo Balter]

This predates to ES5.1 where the Array were bound to a max length of 2 ** 32. 

See https://es5.github.io/#x15.4.4.14

Test262:
test/built-ins/Array/prototype/indexOf/15.4.4.14-3-28.js
test/built-ins/Array/prototype/indexOf/15.4.4.14-3-29.js

Example:

```
var targetObj = {};
var obj = {
  0: 42,
  length: 2 ** 32 - 1
};

[].indexOf.call(obj, 42); // 0

obj.length = 2 ** 32

[].indexOf.call(obj, 42); // -1
```

[Alexey Shvayka]

Thank you for detailed report, Leo.
Apart from Array.prototype.indexOf, other Array methods (mostly ones that are implemented in C++) are affected.
I am merging bug reports to fix all (observable) cases with a single patch.

*** This bug has been marked as a duplicate of bug 163417 ***