michael@0: var w = new WeakMap();
michael@0: var g = newGlobal();
michael@0: var k = g.eval('for (var i=0; i<100; i++) new Object(); var q = new Object(); q');
michael@0: w.set(k, {});
michael@0: k = null;
michael@0: 
michael@0: gc();
michael@0: g.eval('q = null');
michael@0: gc(g);
michael@0: gc();