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function bar(x, i) {
if (i == 50)
x.length = 0;
}
function foo(x, j, n) {
var a = 0;
for (var i = 0; i < n; i++) {
var q = x[j];
bar(x, i);
if (typeof q == 'undefined')
a++;
}
return a;
}
var a = foo([1,2,3,4], 3, 100);
assertEq(a, 49);