170276 - Invalid Comment Tag Renders Enitre Page Invisible

Status: RESOLVED DUPLICATE of bug 42945

(Core :: DOM: HTML Parser, defect)

Description

[Jerry Baker]

I'm pretty sure this should be invalid, but reporting it just in case.

The URL has a comment tag that is never closed (line 22), but it followed by
other comment tags that are closed. It has no doctype, so it should be quirks mode.

EXAMPLE:

<!-- dum comment
...content...
<!-- another comment -->
...content...

Entire page is blank.

BTW - The page works in NN4 and IE6.

Comment 1

[Jerry Baker]

You could look at it two ways I think.

1) The comment in unclosed, and therefor it makes sense that the entire page
after it is blank.

2) Since there are other proper comments after, Mozilla is implicitly allowing
nested comments which, IIRC are not allowed.

Comment 2

[Malcolm Rowe]

You'd need an SGML language lawyer to be certain, but I believe that as the 
SGML comment start/end token is --, the only uncommented text in that example 
is 'another comment'.

Comment 3

[Daniel de Wildt]

I entered a new bug 170283 for the html source viewer.
Source code of the URL after the "comment closed" tag is shown as uncommented
but the browser handled it as commented.

Comment 4

[Mats Palmgren (inactive)]

--> Parser

Comment 5

[harishd]

Heikki, could you please take a look at this? :-)

Comment 6

[Heikki Toivonen (remove -bugzilla when emailing directly)]

Quirks comment parsing is working as expected: it sees, and closes, two
comments. View source shows this ok.

When you look at this in DOM Inspector, you will notice that the document has
HTML, HEAD, 3 META, and BODY tags as well as 5 empty text nodes. There is no
title, no content inside body, according to DOM Inspector.

Back to Harish.

Comment 7

[Boris Zbarsky [:bzbarsky]]

<title>The Straight Dope: Does smoking have any health <em>benefits?</em</title>

That would be an unclosed <title> tag (which view source also shows correctly,
btw).  

*** This bug has been marked as a duplicate of 42945 ***