$.getJSON treats request as JSONP when URL contains ?? (two question marks)

[Stijn]

Similar to ​http://bugs.jquery.com/ticket/8417 and its duplicates, but they're all about the data parameter, not the URL parameter.

Happens with current stable and with edge. Fiddle: ​http://jsfiddle.net/r5zcw6wx/

Code:

$.getJSON("http://date.jsontest.com/")
$.getJSON("http://date.jsontest.com/?foo")
$.getJSON("http://date.jsontest.com/??foo")

Requests:

GET http://date.jsontest.com/
GET http://date.jsontest.com/?foo
GET http://date.jsontest.com/jQuery2129957077760988448071399739372034175163514043816_1408610547781foo?_=1408610547782

Of course we shouldn't be making requests with two question marks (naive string concat on our side), and this could be a dupe of the mentioned ticket, but I figured this was worth reporting anyway.

[m_gol]

Migrated to ​https://github.com/jquery/jquery/issues/1791