js/src/jit-test/tests/basic/testNullIncrement.js


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function f() {
    var n;
    var k;
    for (var i = 0; i < 18; ++i) {
	n = null;
	k = n++;
	if (k) { }
    }
    return [k, n];
}

var [a, b] = f();
assertEq(a, 0);
assertEq(b, 1);