186691 2018-06-15 13:40:36 -0700 [[OwnPropertyKeys]] order with large integer index keys up to 2 ** 53 - 1 2020-11-29 11:51:19 -0800 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED CONFIGURATION CHANGED P2 Normal --- 1 leo webkit-unassigned ashvayka oldest_to_newest 1433531 0 leo 2018-06-15 13:40:36 -0700 From https://tc39.github.io/ecma262/#sec-object-type > An integer index is a String-valued property key that is a canonical numeric String (see 7.1.16) and whose numeric value is either +0 or a positive integer ≤ 2**53-1. An array index is an integer index whose numeric value i is in the range +0 ≤ i < 2**32-1. https://github.com/tc39/test262/pull/1580 Current behavior is not taking values from 2 ** 32 and up as integer index. ``` var o1 = { 12345678900: true, b: true, 1: true, a: true, [Number.MAX_SAFE_INTEGER]: true, 12345678901: true, }; var result = Object.getOwnPropertyNames(o1); result.forEach(k => console.log(k)); ``` prints: ``` "1" "12345678900" "b" "a" "9007199254740991" "12345678901" ``` It should print: ``` "1" "12345678900" "12345678901" "9007199254740991" "b" "a" ``` 1710490 1 ashvayka 2020-11-29 11:51:19 -0800 (In reply to Leo Balter from comment #0) > https://github.com/tc39/test262/pull/1580 > > Current behavior is not taking values from 2 ** 32 and up as integer index. https://github.com/tc39/ecma262/pull/1242 replaced "integer index" with "array index", aligning the spec with web reality. (In reply to Leo Balter from comment #0) > "1" > "12345678900" > "b" > "a" > "9007199254740991" > "12345678901" is now printed by JSC, V8, and SpiderMonkey as per updated spec.