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 // Map(arr) throws if arr contains holes (or undefined values).

 load(libdir + "asserts.js");

 assertThrowsInstanceOf(function () { Map([undefined]); }, TypeError);

 assertThrowsInstanceOf(function () { Map([null]); }, TypeError);

 assertThrowsInstanceOf(function () { Map([[0, 0], [1, 1], , [3, 3]]); }, TypeError);

 assertThrowsInstanceOf(function () { Map([[0, 0], [1, 1], ,]); }, TypeError);

 // Map(iterable) throws if iterable doesn't have array-like objects

 assertThrowsInstanceOf(function () { Map([1, 2, 3]); }, TypeError);

 assertThrowsInstanceOf(function () {

 	let s = new Set([1, 2, "abc"]);

 	new Map(s);

 }, TypeError);