| // This test case failed a WIP patch. See https://bugzilla.mozilla.org/show_bug.cgi?id=504587#c68 | |
| function B() {} | |
| B.prototype.x = 1; | |
| var d = new B; | |
| var names = ['z', 'z', 'z', 'z', 'z', 'z', 'z', 'x']; | |
| for (var i = 0; i < names.length; i++) { | |
| x = d.x; // guard on shapeOf(d) | |
| d[names[i]] = 2; // unpredicted shape change | |
| y = d.x; // guard here is elided | |
| } | |
| assertEq(y, 2); // Assertion failed: got 1, expected 2 |