The Tor Browser / file revision

 // |jit-test| debug

 // Basic call chain.

 var g = newGlobal();

 var result = null;

 var dbg = new Debugger(g);

 dbg.onDebuggerStatement = function (frame) {

     var a = [];

     assertEq(frame === frame.older, false);

     for (; frame; frame = frame.older)

         a.push(frame.type === 'call' ? frame.callee.name : frame.type);

     a.reverse();

     result = a.join(", ");

 };

 g.eval("function first() { return second(); }");

 g.eval("function second() { return eval('third()'); }");

 g.eval("function third() { debugger; }");

 g.evaluate("first();");

 assertEq(result, "global, first, second, eval, third");