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// Get a dictionary object.
var o = {x: 1, y: 2, z: 3};
delete o.x;
// Redefine |y| as an accessor.
var val = 0;
Object.defineProperty(o, "y", {get: () => val, set: v => { val = v; }});
// Optimized Object.assign path should fail.
Object.assign(o, {x: 3, y: 4, z: 5});
assertEq(val, 4);
assertEq(o.x, 3);
assertEq(o.y, 4);
assertEq(o.z, 5);
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