It's not possible to make a iteration over a map with strictNullChecks and target to ES6

[emilgpa]

TypeScript Version:

nightly (1.9.0-dev.20160430)

Code

var myMap = new Map();
myMap.set(0, "zero");
myMap.set(1, "one");
for (var [key, value] of myMap) {
    alert(key + " = " + value);
}

Expected behavior:

Possibility to do a iteration over map.

Actual behavior:

The compiler raises the follow error: Type must have a '[Symbol.iterator]()' method that returns an iterator.

[mhegazy]

duplicate of #8357