[Webkit-unassigned] [Bug 245411] New: Multiple picture sources downloading when page is served as XHTML

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=245411

            Bug ID: 245411
           Summary: Multiple picture sources downloading when page is
                    served as XHTML
           Product: WebKit
           Version: Other
          Hardware: Mac (Intel)
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Images
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: robin at reala.net
                CC: sabouhallawa at apple.com

Created attachment 462466

  --> https://bugs.webkit.org/attachment.cgi?id=462466&action=review

XHTML variant that demonstrates the problem

First up, this is quite possibly a dupe of bug #159484, but as the trigger is different I’ll start with filing this issue separately.

Given a page with a picture element with a source element that references a different resource to the img element, both referenced resources will be downloaded if the page is served as an XHTML document with the appropriate xmlns.

I’ve attached a couple of test files that demonstrate the problem.

This was observed in the wild on https://standardebooks.org/ebooks, which doesn’t contain any JS (trigger from bug #159484) and is served as XHTML.

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