michael@0: function f() {
michael@0:     var x = undefined;
michael@0:     try {
michael@0: 	[1, 2, 3].map(x);
michael@0: 	assertEq(0, 1);
michael@0:     } catch(e) {
michael@0: 	assertEq(e.toString().contains("x is not"), true);
michael@0:     }
michael@0: 
michael@0:     try {
michael@0: 	[1, 2, 3].filter(x, 1, 2);
michael@0: 	assertEq(0, 1);
michael@0:     } catch(e) {
michael@0: 	assertEq(e.toString().contains("x is not"), true);
michael@0:     }
michael@0: }
michael@0: f();