michael@0: // Array.prototype.pop does a strict assignment to this.length even if the
michael@0: // caller is nonstrict. Bug 886087.
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: // obj.length is read-only
michael@0: var obj = {pop: [].pop, 0: "zero"};
michael@0: Object.defineProperty(obj, "length", {configurable: true, value: 1, writable: false});
michael@0: assertThrowsInstanceOf(() => obj.pop(), TypeError);
michael@0: 
michael@0: // obj.length has only a getter
michael@0: obj = {pop: [].pop, 0: "zero", get length() { return 1; }};
michael@0: assertThrowsInstanceOf(() => obj.pop(), TypeError);