Are images in link labels allowed?

As far as I understand the spec, images in link labels are not allowed, are they? I am used to this from GitHub and Pandoc:

[![CC Zero](](

This feels like a spec bug to me.

A link label consists of

  • an opening [, followed by
  • zero or more backtick code spans, autolinks, HTML tags, link labels, backslash-escaped ASCII punctuation characters, or non-] characters, followed by
  • a closing ].

I think that links in general should be allowed in link labels, too.

That linked image syntax actually works in the JavaScript implementation, as you can see using the dingus

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I doubt that links in links in links… make sense.