355602 - elided array elements should not be defined

Status: RESOLVED DUPLICATE of bug 260106

(Core :: JavaScript Engine, defect)

Description

[shutdown]

http://bclary.com/2004/11/07/ecma-262.html#a-11.1.4
11.1.4 Array Initialiser
| Array elements may be elided at the beginning, middle or end of the
| element list. Whenever a comma in the element list is not preceded
| by an AssignmentExpression (i. e., a comma at the beginning or after
| another comma), the missing array element contributes to the length
| of the Array and increases the index of subsequent elements.
| Elided array elements are not defined.

$ cat array-initialiser-hole.txt
var exp = false, act = [,].hasOwnProperty("0");
print("expect: " + exp);
print("actual: " + act);

$ dbg.obj/js array-initialiser-hole.txt
expect: false
actual: true

Comment 1

[Igor Bukanov]

*** This bug has been marked as a duplicate of 260106 ***