michael@0: function f() {
michael@0:     var x = -[NaN][0];
michael@0:     assertEq(x === x, false);
michael@0:     assertEq(x !== x, true);
michael@0:     assertEq(x == x, false);
michael@0:     assertEq(x != x, true);
michael@0: 
michael@0:     var y = -("x" / {});
michael@0:     var z = y;
michael@0:     assertEq(y === z, false);
michael@0:     assertEq(y !== z, true);
michael@0:     assertEq(y == z, false);
michael@0:     assertEq(y != z, true);
michael@0: }
michael@0: f();
michael@0: 
michael@0: function g(x, y) {
michael@0:     var z = x / y;
michael@0:     assertEq(z === z, false);
michael@0: }
michael@0: g(0, 0);