pop-nonarray-nonwritable-length.js (489B)
1 // Array.prototype.pop does a strict assignment to this.length even if the 2 // caller is nonstrict. Bug 886087. 3 4 load(libdir + "asserts.js"); 5 6 // obj.length is read-only 7 var obj = {pop: [].pop, 0: "zero"}; 8 Object.defineProperty(obj, "length", {configurable: true, value: 1, writable: false}); 9 assertThrowsInstanceOf(() => obj.pop(), TypeError); 10 11 // obj.length has only a getter 12 obj = {pop: [].pop, 0: "zero", get length() { return 1; }}; 13 assertThrowsInstanceOf(() => obj.pop(), TypeError);