js/src/jit-test/tests/basic/bug504587-1.js@6474c204b198 (annotated)
js/src/jit-test/tests/basic/bug504587-1.js
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | // This test case failed a WIP patch. See https://bugzilla.mozilla.org/show_bug.cgi?id=504587#c68 |
| michael@0 | 2 | |
| michael@0 | 3 | function B() {} |
| michael@0 | 4 | B.prototype.x = 1; |
| michael@0 | 5 | var d = new B; |
| michael@0 | 6 | |
| michael@0 | 7 | var names = ['z', 'z', 'z', 'z', 'z', 'z', 'z', 'x']; |
| michael@0 | 8 | for (var i = 0; i < names.length; i++) { |
| michael@0 | 9 | x = d.x; // guard on shapeOf(d) |
| michael@0 | 10 | d[names[i]] = 2; // unpredicted shape change |
| michael@0 | 11 | y = d.x; // guard here is elided |
| michael@0 | 12 | } |
| michael@0 | 13 | assertEq(y, 2); // Assertion failed: got 1, expected 2 |
