170807 2017-04-13 09:32:01 -0700 Object literal syntax creates extra (not-specified) properties 2017-04-13 14:29:43 -0700 1 1 1 Unclassified WebKit JavaScriptCore Safari 10 iPhone / iPad iOS 10 RESOLVED DUPLICATE 164412 P2 Critical --- 1 dominic.szablewski webkit-unassigned oldest_to_newest 1297005 0 dominic.szablewski 2017-04-13 09:32:01 -0700 var obj = {"512":1.0, "1024":2.0}; console.log(obj); // {0: NaN, 1: NaN, 2: NaN, 3: NaN, 4: NaN, 5: NaN, 6: NaN, 7: NaN, 8: NaN, 9: NaN, …} Tested on iOS 10.3.1 1297134 1 dominic.szablewski 2017-04-13 14:29:43 -0700 *** This bug has been marked as a duplicate of bug 164412 ***