Frame-onPop-multiple-02.js

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// One Debugger's onPop handler can remove another Debugger's onPop handler.

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

var dbg1 = new Debugger(g);

var dbg2 = new Debugger(g);

var log;

var frames = [];

var firstPop = true;

function handleEnter(frame) {

    log += '(';

    frames.push(frame);

    frame.onPop = function handlePop(completion) {

        log += ')';

        assertEq(completion.return, 42);

        if (firstPop) {

            // We can't say which frame's onPop handler will get called first.

            if (this == frames[0])

                frames[1].onPop = undefined;

            else

                frames[0].onPop = undefined;

            gc();

        } else {

            assertEq("second pop handler was called",

                     "second pop handler should not be called");

        firstPop = false;

};

};

dbg1.onEnterFrame = handleEnter;

dbg2.onEnterFrame = handleEnter;

log = '';

assertEq(g.eval('40 + 2'), 42);

assertEq(log, '(()');