303236 - Textarea end tag not checked for in bad code leading to HTML spillage

Status: RESOLVED DUPLICATE of bug 263012

(Core :: DOM: HTML Parser, defect)

Description

[Chris Hester]

User-Agent:       Opera/8.02 (Windows NT 5.1; U; en)
Build Identifier: 

If a form with a textarea element has a missing end tag, Firefox does not check 
for this and displays the rest of the code inside the textarea onscreen.

Reproducible: Always

Steps to Reproduce:
1. Create form with textarea but do not add an end tag
2. 
3.

Actual Results:  
Code after the opening textarea tag is output onscreen.

Expected Results:  
The element should have been automatically closed and the rest of the page 
processed as normal.

* In Opera 8, the textarea is closed (correct error-checking behaviour)

* In IE6/XP, the same problem as Firefox occurs (code spills into the textarea)

* Textareas can contain HTML tags which are shown onscreen, so I realise this is 
happening here.

* If the textarea is written in an XML format as in "(textarea/)" then the same 
problem occurs (using an XHTML page served as text/html). I checked the HTML 
specs and it says the end tag is required. But Firefox needs to check for cases 
of invalid code as it does with other elements.

* If you serve the page as XML then "(textarea/)" becomes a valid construct, 
assuming the textarea is empty. Firefox then closes the form properly.

Comment 1

[Martijn Wargers (dead)]

A testcase or example would be nice.

Comment 2

[Chris Hester]

Attachment: Example code that shows the bug

The attachment shows a form with two textareas. One has an end tag, the other
has a closed tag in the XML format for empty elements. (This allows testing in
XML mode if the file is given a proper XML declaration and renamed as .xml)
This works the same as just using an opening textarea tag without a closing
one.

Note: if the code stops because no textarea end tag is found, there will be no
Reset button shown after the form. You should see the code appear in the
textarea instead (onscreen).

Comment 3

[Martijn Wargers (dead)]

Ok, thanks for the testcase, but this bug is a duplicate of bug 263012.

*** This bug has been marked as a duplicate of 263012 ***