pop-nonarray-nonwritable-length.js

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// 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);