1486265 - Inconsistent result when using negative/float index to assign a TypedArray object

Status: RESOLVED DUPLICATE of bug 1129202

(Core :: JavaScript Engine, defect)

Description

[sunlili]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36

Steps to reproduce:

Executing following code :

var a = new Int32Array(5)
a[1] = 1;
a[2.5] = 2;
a[-3] = 3;
a[NaN] = 4;
a[10] = 5;
print(JSON.stringify(a));
print("BT_FLAG")


Actual results:

Output of ChakraCore and V8:
{"0":0,"1":1,"2":0,"3":0,"4":0}
BT_FLAG

Output of SpiderMonkey:
{"0":0,"1":1,"2":0,"3":0,"4":0,"2.5":2,"NaN":4}
BT_FLAG

Output of JavaScriptCore:
{"0":0,"1":1,"2":0,"3":0,"4":0,"2.5":2,"-3":3,"NaN":4}
BT_FLAG


Expected results:

I don't know which one is correct.

Comment 1

[André Bargull [:anba]]

(In reply to sunlili from comment #0)
> Expected results:
> 
> I don't know which one is correct.

ChakraCore and V8 are correct. 

This issue will be fixed by bug 1129202.