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