321472 - doctype strict comment parsing problem

Status: RESOLVED DUPLICATE of bug 214476

(Core :: DOM: HTML Parser, defect)

Description

[ski]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20051224 Firefox/1.6a1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20051224 Firefox/1.6a1

NOTE: I belive this should be filed in layout, but that option is unavailable??

The problem exists when a comment has the characters '--' in it.

For example, <!-- Yk2--B_345 -->

My guess from perusing the spec is that this is an attempt to work around scripts and CSS embedded in HTML comments (illegal in XHTML strict) by saying "if -- exists in the block, it is not a comment"? If that is indeed the case may I suggest checking to make sure there is a <script> or <style> block in the comment before deciding to render this content.

Removing the doctype eliminates the problem.

Tested on ffox 1.6a as of 12/24/2005 and ffox 1.5 on winXP.


Reproducible: Always

Steps to Reproduce:
1. Make an HTML comment with the characters -- in it
2. Set doctype to XHTML/Strict
3. Render.

Actual Results:  
Full comment text including start and end of comment tags (<!-- and -->) is displayed.

Expected Results:  
Hide the comment.

Comment 1

[ski]

Would have been clearer if that first sentence said:

The problem exists when a comment has the characters '--' in it AND doctype is XHTML strict.

As it is now you don't realize it's related to XHTML strict parsing until much later. Sorry for the confusion.

Comment 2

[Jo Hermans]

-- inside a comment is invalid ! See http://www.w3.org/TR/html4/intro/sgmltut.html#h-3.2.4

*** This bug has been marked as a duplicate of 214476 ***