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function test() {
var c = 0;
for (var i=0; i<20; i++) {
var arr = [1];
if (i > 5)
Object.defineProperty(arr, "length", { writable: false, value: 4 });
try {
arr.push(2);
} catch(e) {
assertEq(e.toString().includes("length"), true);
c++;
}
}
assertEq(c, 14);
}
test();