The Tor Browser / file revision

 function test_not_too_long() {

   var ios = Cc["@mozilla.org/network/io-service;1"].

     getService(Ci.nsIIOService);

   var spec = "jar:http://example.com/bar.jar!/";

   try {

     var newURI = ios.newURI(spec, null, null);

   }

   catch (e) {

     do_throw("newURI threw even though it wasn't passed a large nested URI?");

   }

 }

 function test_too_long() {

   var ios = Cc["@mozilla.org/network/io-service;1"].

     getService(Ci.nsIIOService);

   var i;

   var prefix = "jar:";

   for (i = 0; i < 16; i++) {

     prefix = prefix + prefix;

   }

   var suffix = "!/";

   for (i = 0; i < 16; i++) {

     suffix = suffix + suffix;

   }

   var spec = prefix + "http://example.com/bar.jar" + suffix;

   try {

     // The following will produce a recursive call that if

     // unchecked would lead to a stack overflow. If we

     // do not crash here and thus an exception is caught

     // we have passed the test.

     var newURI = ios.newURI(spec, null, null);

   }

   catch (e) {

     return;

   }

 }

 function run_test() {

   test_not_too_long();

   test_too_long();

 }