20974 2013-02-12 11:45:06 +0000 Comments including meta tag 2013-02-13 18:13:41 +0000 1 1 1 Unclassified Validator check HEAD All All NEW P2 normal --- 1 iaack dave.null mike www-validator-cvs oldest_to_newest 82983 0 iaack 2013-02-12 11:45:06 +0000 The validator fails to handle comments including meta tags like this <!DOCTYPE html> <title></title>  After validated, This text will be changed to <!DOCTYPE html> <title></title>  --> The error message is following Consecutive hyphens did not terminate a comment. -- is not permitted inside a comment, but e.g. - - is. 82996 1 mike 2013-02-12 13:46:59 +0000 Thanks for reporting this. It seems to be a bug in the legacy validator code, because you're using http://validator.w3.org/ to check your document. I recommend that you don't use that but instead use http://validator.w3.org/nu/ The code for the legacy validator at http://validator.w3.org/ is not code I work on but as far as I can see it appears to be doing some pre-processing on the input it sends to the HTML5 backend. The way to avoid that broken preprocessing is to instead use the UI at http://validator.w3.org/nu/ which sends the input to the same HTML5 backend but without doing any preprocessing. I'll try to get this bug in the legacy validator fixed but I think it's likely I'll do that simply by having the request redirected to http://validator.w3.org/nu/ so that the preprocessing gets bypassed completely. 83093 2 mike 2013-02-13 08:02:18 +0000 Ville, I can reproduce this bug with the doctype set to HTML4, so this isn't a bug in the HTML5 backend or in the REST API for the HTML5 validator but rather it seems a bug in some preprocessing step in the validator perl code. 83113 3 ville.skytta 2013-02-13 18:13:41 +0000 That's right, I took a brief look at it too. The culprit is override_charset() which does a simple text replacement without any "intelligence" whatsoever and thus has no idea about the context it is working in. I'm afraid it'll take more than a few lines of code to fix this.