bug504587-1.js (428B)
1 // This test case failed a WIP patch. See https://bugzilla.mozilla.org/show_bug.cgi?id=504587#c68 2 3 function B() {} 4 B.prototype.x = 1; 5 var d = new B; 6 7 var names = ['z', 'z', 'z', 'z', 'z', 'z', 'z', 'x']; 8 for (var i = 0; i < names.length; i++) { 9 x = d.x; // guard on shapeOf(d) 10 d[names[i]] = 2; // unpredicted shape change 11 y = d.x; // guard here is elided 12 } 13 assertEq(y, 2); // Assertion failed: got 1, expected 2