[picture] spec text regarding sibling sources needing media or type attr

Hello all, hoping I can get an answer to my question regarding this line in the spec:

	# When a source element has a following sibling source element or img element with a srcset attribute specified, it must have at least one of the following:
	# A media attribute...
	# A type attribute...

Reading this makes me believe that the following[1] should error out on at least the first one, the second one is technically valid but the first one is selected in both Chrome and Firefox.

	<picture>
    		<source sizes="(min-width: 500px) 100px" srcset="http://placehold.it/1000 1000w">
    		<source media="(max-width: 500px)" srcset="http://placehold.it/500">
    		<img srcset="http://placehold.it/500">
  	</picture>

Any insight into why this is allowed would be appreciated. Thanks,
Greg

[1]  http://jsbin.com/xojeridipe/1/edit?html,js,output

Received on Friday, 17 July 2015 19:38:24 UTC