bug-2042756.js - mozsearch

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

var dbg = new Debugger(g);

var armed = false, pc = 0;

dbg.onEnterFrame = function (frame) {

  frame.onStep = function () {

    if (!armed) {

      return;

    var u = "";

    try {

      u = String(frame.script.url);

    } catch (e) {}

    if (u === "parent.js") {

      pc++;

      if (pc >= 3) {

        return { throw: "boom-from-debugger" };

};

};

g.eval(`

  var child = parseModule("await new Promise(r => { globalThis.__pc = r; }); export let cv = 10;", "child.js");

  registerModule("child", child);

  var parent = parseModule("import { cv } from 'child'; await new Promise(r => { globalThis.__pp = r; }); globalThis.result = cv + 1;", "parent.js");

  moduleLink(parent);

  var ev = moduleEvaluate(parent);

  if (ev && ev.then) ev.then(() => {}, () => {});

`);

g.eval("try { globalThis.__pp(1); } catch (e) {}");

try { drainJobQueue(); } catch (e) {}

armed = true;

g.eval("try { globalThis.__pc(1); } catch (e) {}");

try { drainJobQueue(); } catch (e) {}