317294 - Problem with e4x initialization from an xbl component and @mozilla.org/moz/jssubscript-loader;1

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, defect)

Description

[Cyril Giraudon]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8) Gecko/20051118 Firefox/1.5
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8) Gecko/20051118 Firefox/1.5

i load a javascript file containing :"function e4xInit() {var a = <a/>;}; e4xInit();" with loadSubScript (xbl) and I obtain an NS_ERROR_NOT_IMPLEMENTED error at the line "var a = <a/>;" with ff1.5rc3 on linux.

Reproducible: Always

Actual Results:  
Error: uncaught exception: [Exception... "Method not implemented"  nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)"  location: "JS frame :: chrome://mytest/content/toto.js :: e4xInit :: line 3"  data: no]

Expected Results:  
No error.

Comment 1

[Cyril Giraudon]

Attachment: Little extension shwowing the problem.

Just uncompress the zip file in an extension directory and open chrome://mytest/content/test.xul.
Look at the javascript console :
Error: uncaught exception: [Exception... "Method not implemented"  nsresult: "0x80004001 (NS_ERROR_NOT_IMPLEMENTED)"  location: "JS frame :: chrome://mytest/content/toto.js :: e4xInit :: line 3"  data: no]

Comment 2

[Martijn Wargers (dead)]

Attachment: testcase

Testcase derived from extension. You need to download and test it locally to see the error described by the reporter.
The  js data uri is this:
function e4xInit()
{
  var a = <a/>;
}
e4xInit();

Comment 3

[Brendan Eich [:brendan]]

This has nothing to do with E4X.

http://lxr.mozilla.org/mozilla/search?string=Method%20not%20implemented

Reporter: you need to debug a bit to see where this is thrown.

/be

Comment 4

[Martijn Wargers (dead)]

Prior to the exception, I get an assertion in my debug build:
###!!! ASSERTION: Write me!: 'Error', file c:/mozilla/mozilla/dom/src/base/nsDOM
ClassInfo.cpp, line 4029

This corresponds to the nsWindowSH::GetProperty function, this stuff:
      } else {
        NS_ERROR("Write me!");

        return NS_ERROR_NOT_IMPLEMENTED;
      }

      return NS_OK;
    }

Comment 5

[Cyril Giraudon]

Attachment: New textboxes.xml and toto.js

I don't know if it can help but using loadSubScript with two arguments, and moving the execution instruction from toto.js to textboxes.xml makes this work fine :

var b = new Object();
var a = Components.classes["@mozilla.org/moz/jssubscript-loader;1"].getService(Components.interfaces.mozIJSSubScriptLoader);
a.loadSubScript("chrome://mytest/content/toto.js", b);
b.e4xInit();

Comment 6

[Matthias Versen [:Matti]]

E4X will be removed again from Spidermonkey (bug 788293)