michael@0: // An Environment keeps its referent alive.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("function f(x) { return 2 * x; }");
michael@0: var dbg = Debugger(g);
michael@0: var env;
michael@0: dbg.onEnterFrame = function (frame) { env = frame.environment; };
michael@0: assertEq(g.f(22), 44);
michael@0: dbg.onEnterFrame = undefined;
michael@0: 
michael@0: assertEq(env.find("x"), env);
michael@0: assertEq(env.names().join(","), "arguments,x");
michael@0: 
michael@0: gc();
michael@0: g.gc(g);
michael@0: gc(env);
michael@0: 
michael@0: assertEq(env.find("x"), env);
michael@0: assertEq(env.names().join(","), "arguments,x");