michael@0: // After an implicit toString call throws an exception, the calling frame's
michael@0: // onStep hook fires.
michael@0: 
michael@0: var g = newGlobal();
michael@0: g.eval("var x = {toString: function () { debugger; log += 'x'; throw 'mud'; }};");
michael@0: 
michael@0: var dbg = Debugger(g);
michael@0: dbg.onDebuggerStatement = function (frame) {
michael@0:     g.log += 'd';
michael@0:     frame.older.onStep = function () {
michael@0:         if (!g.log.match(/[sy]$/))
michael@0:             g.log += 's';
michael@0:     };
michael@0: };
michael@0: 
michael@0: g.log = '';
michael@0: g.eval("try { x + ''; } catch (x) { }\n" +
michael@0:        "log += 'y';\n");
michael@0: assertEq(g.log, "dxsy");
michael@0: 
michael@0: g.log = '';
michael@0: g.eval("try { '' + x; } catch (x) { }\n" +
michael@0:        "log += 'y';\n");
michael@0: assertEq(g.log, "dxsy");