Frame-onStep-09.js

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// After an implicit toString call throws an exception, the calling frame's

// onStep hook fires.

var g = newGlobal({newCompartment: true});

g.eval("var x = {toString: function () { debugger; log += 'x'; throw 'mud'; }};");

var dbg = Debugger(g);

dbg.onDebuggerStatement = function (frame) {

    g.log += 'd';

    frame.older.onStep = function () {

        if (!g.log.match(/[sy]$/))

            g.log += 's';

};

};

g.log = '';

g.eval("try { x + ''; } catch (x) { }\n" +

       "log += 'y';\n");

assertEq(g.log, "dxsy");

g.log = '';

g.eval("try { '' + x; } catch (x) { }\n" +

       "log += 'y';\n");

assertEq(g.log, "dxsy");