The Tor Browser / file revision

 // Any copyright is dedicated to the Public Domain.

 // http://creativecommons.org/licenses/publicdomain/

 // Contributor: Jim Blandy

 if (typeof findReferences == "function") {

     (function f() {

          assertEq(referencesVia(arguments, 'callee', f), true);

      })();

     var o = ({});

     function returnHeavy(y) { eval(''); return function heavy() { return y; }; }

     assertEq(referencesVia(returnHeavy(o), 'fun_callscope; y', o), true);

     assertEq(referencesVia(returnHeavy(o), 'fun_callscope; shape; base; parent', this), true);

     function returnBlock(z) { eval(''); let(w = z) { return function block() { return w; }; }; }

     assertEq(referencesVia(returnBlock(o), 'fun_callscope; w', o), true);

     function returnWithObj(v) { with(v) return function withObj() { return u; }; }

     assertEq(referencesVia(returnWithObj(o), 'fun_callscope; type; type_proto', o), true);

     reportCompare(true, true);

 } else {

     reportCompare(true, true, "test skipped: findReferences is not a function");

 }