509009 - [HTML5][Patch] <!-- inside an xmp element is occasionally a problem

Status: RESOLVED FIXED

(Core :: DOM: HTML Parser, defect, P1)

Description

[User2351]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2a1pre) Gecko/20090806 Minefield/3.6a1pre

 

Reproducible: Always

Steps to Reproduce:
1. Set html5.enable true in about:config
2. Load this document:

data:text/html,<xmp><!--</xmp>

Actual Results:  
The page shows the text:

<!--</xmp>


Expected Results:  
The page should only show the text:

<!--


In contrast to the about doc, the following document:

data:text/html,<xmp><!--xmp--></xmp>

behaves as expected, because it shows and only shows the content of the xmp element:

<!--xmp-->

Comment 1

[User2351]

s/the about doc/the above doc/

Comment 2

[Henri Sivonen (:hsivonen)]

Is this a problem with a published Web page out there?

For reference, WebKit and IE reparse with <xmp>:
http://software.hixie.ch/utilities/js/live-dom-viewer/saved/201
http://software.hixie.ch/utilities/js/live-dom-viewer/saved/202

Comment 3

[Henri Sivonen (:hsivonen)]

I wrote up a relatively radical proposal for a fix:
http://wiki.whatwg.org/wiki/CDATA_Escapes

Comment 4

[Henri Sivonen (:hsivonen)]

Attachment: Update tokenizer to spec (excluding new script states)

Comment 5

[Henri Sivonen (:hsivonen)]

http://hg.mozilla.org/mozilla-central/rev/d01a520e3fd1