bug#20141: 24.4.91; Helm is broken after last changes in eieio

[Ivan Shmakov]

>>>>> Thierry Volpiatto <thierry.volpiatto@gmail.com> writes:
>>>>> Ivan Shmakov <ivan@siamics.net> writes:

 >> Frankly, I wasn’t even able to build Emacs as of 8dfff871bdf0
 >> (2015-03-18 14:49:55Z), although the error for me is different
 >> (MIMEd.  Please note that I do not bootstrap – I /always/ build in a
 >> freshly created build directory; lndir-ed.)  Going two commits back
 >> (to fd93edbb1cab) resolved the issue.

 > Building fine for me

        As of 8dfff871bdf0 or (the more recent) 50c117fe86d9?

 > even without bootstrapping.

        That’s the point: the build procedure I follow effectively does
        ‘bootstrap’ for each and every build; that is: no .elc of one
        build is available for use to another.  Think of, say:

$ git clone emacs emacs-build \
      && cd emacs-build \
      && autoreconf -v -i -I m4 \
      && ./configure --prefix="$HOME" --disable-silent-rules … \
      && LC_ALL=C nice -n+19 ionice -c 3 nohup /usr/bin/time \
             make -j 2 -- lib lib-src src lisp & 

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