UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.75 Safari/537.36

Steps to reproduce the problem:
0. Create an object with a key greater or equal to 1024, a negative int. Test the existence of the negative key using hasOwnProperty.

1. GOOD
var foo = {};
foo[-1] = 'foo';
foo[1024] = 'bar';
Object.prototype.hasOwnProperty.call(foo, -1); // false

2. BAD
var foo = {};
foo[-1] = 'foo';
foo[1023] = 'bar';
Object.prototype.hasOwnProperty.call(foo, -1); // true

What is the expected behavior?
hasOwnProperty should return true if the key is present, even if the key is negative and there's another key greater or equal to 1024.

What went wrong?
hasOwnProperty returns false even though the key is present.
Works in Chrome 54, doesn't work in Chrome 55

Did this work before? Yes 54

Chrome version: 55.0.2883.75  Channel: n/a
OS Version: 
Flash Version: