>>>>> "LMI" == Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

    LMI> Could you try to replicate the bug without using all these
    LMI> packages not in "emacs -Q"?

It was a bit tricky (curious case!), but I’ve found it.

Run Emacs with the attached file:

  emacs -Q -l url-http-bug.el

When prompted for password, press Enter.  You should get the bug (with
both Emacs 24.5 or git master from end of December).