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function test(obj, expected) {
var actual = 0;
for (var s in obj) {
actual += obj[s];
}
assertEq(actual, expected);
}
var arr = [];
for (var i = 0; i < 20; i++) {
var obj = {};
for (var j = 0; j < i; j++) {
obj["x_" + i + "_" + j] = 1;
}
arr.push(obj);
}
// Test fixed and dynamic slots
with ({}) {}
for (var i = 0; i < 2000; i++) {
var idx = i % arr.length;
test(arr[idx], idx);
}