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function testBug501690() {
// Property cache assertion when 3 objects along a prototype chain have the same shape.
function B(){}
B.prototype = {x: 123};
function D(){}
D.prototype = new B;
D.prototype.x = 1; // [1] shapeOf(B.prototype) == shapeOf(D.prototype)
arr = [new D, new D, new D, D.prototype]; // [2] all the same shape
for (var i = 0; i < 4; i++)
assertEq(arr[i].x, 1); // same kshape [2], same vshape [1]
}
testBug501690();
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