michael@0: // If frame.onStep returns null, the debuggee terminates.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("function h() { debugger; }");
michael@0: 
michael@0: var dbg = Debugger(g);
michael@0: var hits = 0;
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     hits++;
michael@0:     if (hits == 1) {
michael@0:         var rv = frame.eval("h();\n" +
michael@0:                             "throw 'fail';\n");
michael@0:         assertEq(rv, null);
michael@0:     } else {
michael@0:         frame.older.onStep = function () { return null; };
michael@0:     }
michael@0: };
michael@0: g.h();
michael@0: assertEq(hits, 2);