michael@0: // frame.eval throws if frame is a generator frame that isn't currently on the stack
michael@0: 
michael@0: load(libdir + "asserts.js");
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("function gen(a) { debugger; yield a; }");
michael@0: g.eval("function test() { debugger; }");
michael@0: var dbg = new Debugger(g);
michael@0: var genframe;
michael@0: var hits = 0;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     if (frame.callee.name == 'gen')
michael@0:         genframe = frame;
michael@0:     else
michael@0:         assertThrowsInstanceOf(function () { genframe.eval("a"); }, Error);
michael@0:     hits++;
michael@0: };
michael@0: g.eval("var it = gen(42); assertEq(it.next(), 42); test();");
michael@0: assertEq(hits, 2);