567745 - "--- END" characters sequence resulting HTML code into comments

Status: RESOLVED DUPLICATE of bug 214476

(Firefox :: General, defect)

Description

[minesh]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3

When I try to put "--- END" characters on my page (ignore double quotes surrounding) it behaves very strangely, firefox version 3.5.2 

1) I use inside comments , like
<!-- XYZ section --- END --> and I found my comment section was not closed as expected and instead it blocked lots of lines of HTML

2) I use --- END inside HTML just to check its behavior
and I found that the HTML line just after that was <table > which is shown as commented in view source, and that broke HTML of the page

Reproducible: Always

Steps to Reproduce:
When I try to put "--- END" characters on my page (ignore double quotes surrounding) it behaves very strangely, firefox version 3.5.2 

1. I use inside comments , like
<!-- XYZ section --- END --> and I found my comment section was not closed as expected and instead it blocked lots of lines of HTML

2. I use --- END inside HTML just to check its behavior
and I found that the HTML line just after that was <table > which is shown as commented in view source, and that broke HTML of the page

Comment 1

[Jo Hermans]

Don't use more than 2 hypens inside a comment - due to the SGML rules, this can create unexpected results.

http://www.w3.org/TR/html4/intro/sgmltut.html#h-3.2.4
https://bugzilla.mozilla.org/show_bug.cgi?id=214476#c4

It will be fixed in Firefox 3.7, which uses the HTML5 parser, not the HTML4 one.