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load(libdir + "asserts.js");
function f(arr, v1, v2)
{
// Ensure array_push_slowly is called by passing more than one argument.
arr.push(v1, v2);
}
var N = 100;
function test(out)
{
// Create an array of arrays, to be iterated over for [].push-calling. We
// can't just loop on push on a single array with non-writable length because
// push throws when called on an array with non-writable length.
var arrs = out.arrs = [];
for (var i = 0; i < N; i++)
arrs.push([]);
// Use a much-greater capacity than the eventual non-writable length.
var a = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15];
Object.defineProperty(a, "length", { writable: false, value: 6 });
arrs.push(a);
for (var i = 0, sz = arrs.length; i < sz; i++)
{
var arr = arrs[i];
f(arr, 8675309, 3141592);
}
}
var obj = {};
assertThrowsInstanceOf(function() { test(obj); }, TypeError);
var arrs = obj.arrs;
assertEq(arrs.length, N + 1);
for (var i = 0; i < N; i++)
{
assertEq(arrs[i].length, 2, "unexpected length for arrs[" + i + "]");
assertEq(arrs[i][0], 8675309, "bad element for arrs[" + i + "][0]");
assertEq(arrs[i][1], 3141592, "bad element for arrs[" + i + "][1]");
}
var a = arrs[N];
assertEq(a.hasOwnProperty(6), false);
assertEq(a[6], undefined);
assertEq(a.hasOwnProperty(7), false);
assertEq(a[7], undefined);
assertEq(a.length, 6);
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