Recently I found a new hint when answering the questions in SO, saying:
Please make your answer complete by including relevant, formatted code inline (don't just link to jsfiddle.net).
In one question the OP mixed up the library he embeds in the Fiddle, and the answer was to point out that the library should be changed (which finally leads to correct code run).
So I was unable to post a link to the corrected Fiddle because of the hint popped up each form submission:
To avoid the problem I've made a screenshot of library selection block instead... but anyways, how should we do in such situations?
UPDATE: Since we may consider the described example as an edge-case, why then we still able to post an answer with jsfiddle.net link but without scheme prefix (i.e. jsfiddle.net/abcdef)? Of course the link doesn't become an anchor, but still is quite readable, which doesn't protect of the link-only answers. Hence it makes the feature somewhat buggy.