makeArray can cause browser crash on non array objects with length property

[jwheare]

I haven't tested this with 1.4

For an object with a length property that casts to a non-zero positive integer, makeArray will create an array with that length filled with undefined.

>>> jQuery.makeArray({'length': '5'})
[undefined, undefined, undefined, undefined, undefined]

If the length property is zero, negative or a decimal then Firefox and Safari both hang. (FF shows the unresponsive script error, Safari hangs until it crashes)

>>> jQuery.makeArray({'length': '0'})
>>> jQuery.makeArray({'length': '5.2'})
>>> jQuery.makeArray({'length': '-3'})

[john]

Fixed.  http://github.com/jquery/jquery/commit/715d1c5a30cc4986018bbf063713f14c34c3e258

[314159abcde]

This has not been corrected.

Try:

jQuery.makeArray( {'length':5} );

in the firebug console on any jQuery site and it will output [undefined, undefined, undefined, undefined, undefined]

when it should return [Object { length=5}]

This is causing issues where I have an object with a length and width attribute, since it will not pass through makeArray properly.

[snover]

It is working as designed.

[john]

There wasn't a 1.4.5 release, was actually 1.5.

[john]

There was no 1.4.5 release, was actually 1.5.