The Tor Browser / file revision

 // Try to test that we handle shape regeneration correctly.

 // This is a fragile test, but as of this writing, on dmandelin's

 // windows box, we have the same shape number with different

 // logical shapes in the two assertEq lines.

 var o;

 var p;

 var zz;

 var o2;

 function f(x) {

   return x.a;

 }

 gczeal(1);

 gc();

 zz = { q: 11 };

 o = { a: 77, b: 88 };

 o2 = { c: 11 };

 p = { b: 99, a: 11 };

 //print('s ' + shapeOf(zz) + ' ' + shapeOf(o) + ' ' + shapeOf(o2) + ' ' + shapeOf(p));

 assertEq(f(o), 77);

 o = undefined;

 gczeal(1);

 gc();

 //print('s ' + 'x' + ' ' + shapeOf(p));

 assertEq(f(p), 11);