bug1448136.js - mozsearch

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print = function(s) { return s.toString(); }

assertEq = function(a,b) {

  try { print(a); print(b); } catch(exc) {}

g = newGlobal({newCompartment: true});

g.parent = this;

g.eval("(" + function() {

  Debugger(parent).onExceptionUnwind = function(frame) {

    frame.older

} + ")()")

function a() {};

function b() {};

for (let _ of Array(100))

  assertEq(b instanceof a, true);

function c(){};

function d(){};

function e(){};

Object.defineProperty(a, Symbol.hasInstance, {value: assertEq });

let funcs = [a, b, c, d];

for (let f of funcs)

  assertEq(e instanceof f, true);