Bug 817347

Summary:	app-text/htmltidy-5.8.0-r1 spurious warning for same-document references
Product:	Gentoo Linux	Reporter:	Ulrich Müller <ulm>
Component:	Current packages	Assignee:	Marek Szuba <marecki>
Status:	CONFIRMED ---
Severity:	normal	CC:	marecki
Priority:	Normal	Keywords:	UPSTREAM
Version:	unspecified
Hardware:	All
OS:	Linux
See Also:	https://github.com/htacg/tidy-html5/issues/1003
Whiteboard:
Package list:		Runtime testing required:	---

Description Ulrich Müller gentoo-dev

2021-10-10 10:13:29 UTC

Seen with the top-level file of the devmanual:

$ tidy -q --drop-empty-elements no index.html >/dev/null
line 74 column 38 - Warning: <a> attribute "href" lacks value

The line in question is:

<h1 class="first-header">Master Index<a class="permalink" href=""><span class="fa fa-link"></span></a>
</h1>


However, an empty href attribute is perfectly valid. RFC 3986 <https://www.rfc-editor.org/rfc/rfc3986.html#section-4.4> says:

"The most frequent examples of same-document references are relative references that are empty or include only the number sign ("#") separator followed by a fragment identifier."

Comment 1 Patrice Clement gentoo-dev

2021-10-10 12:42:40 UTC

Hey Ulrich! Thanks for the bug report. Did you talk to upstream about this weird warning? It looks like a bug with tidy. You will most likely have better luck with the upstream authors than us! ;)