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/*===
object 4 1,2,3,4
===*/
try {
var t1 = [ 1, 2 ];
var t2 = [ 3, 4 ];
var t3;
t2.length = 4;
// t2.length is 4, but in E5.1 Section 15.4.4.4 the result Array
// does not get updated for any trailing non-existent elements of
// t2. The result should thus have length 4, but e.g. V8 and Rhino
// will have length 6.
t3 = t1.concat(t2);
print(typeof t3, t3.length, t3);
} catch (e) {
print(e);
}