michael@0: // Trying to set an onPop handler on a dead frame throws an exception.
michael@0: var g = newGlobal();
michael@0: g.eval("function f() { }");
michael@0: g.eval("function g() { f(); }");
michael@0: g.eval("function h() { g(); }");
michael@0: g.eval("function i() { h(); }");
michael@0: var dbg = new Debugger(g);
michael@0: var log;
michael@0: 
michael@0: var frames = [];
michael@0: dbg.onEnterFrame = function handleEnter(f) {
michael@0:     log += "(";
michael@0:     assertEq(f.live, true);
michael@0:     frames.push(f);
michael@0: };
michael@0: log = '';
michael@0: g.i();
michael@0: assertEq(log, "((((");
michael@0: assertEq(frames.length, 4);
michael@0: for (i = 0; i < frames.length; i++) {
michael@0:     assertEq(frames[i].live, false);
michael@0:     var set = false;
michael@0:     try {
michael@0:         frames[i].onPop = function unappreciated() { };
michael@0:         set = true; // don't assert in a 'try' block
michael@0:     } catch (x) {
michael@0:         assertEq(x instanceof Error, true);
michael@0:     }
michael@0:     assertEq(set, false);
michael@0: }