Stefan Husmann <stefan-husmann@t-online.de> writes:

> I write this using an emacs from xwidgets-mvp-branch, but the bug happens
> when trying to build from master. 
>
> Message:
> Loading /home/haawda/paketierung/maintained_by_me/emacs-lucid-git/src/emacs-lucid-git/lisp/emacs-lisp/timer.el (source)...
> Eager macro-expansion failure: (void-function cl-every)
> Eager macro-expansion failure: (void-function cl-every)
> Symbol's function definition is void: cl-every
> Makefile:830: recipe for target 'bootstrap-emacs' failed
> make[2]: *** [bootstrap-emacs] Error 255
> make[2]: Leaving directory '/home/haawda/paketierung/maintained_by_me/emacs-lucid-git/src/emacs-lucid-git/src'
> Makefile:398: recipe for target 'src' failed
> make[1]: *** [src] Error 2
> make[1]: Leaving directory '/home/haawda/paketierung/maintained_by_me/emacs-lucid-git/src/emacs-lucid-git'
> Makefile:1086: recipe for target 'bootstrap' failed
> make: *** [bootstrap] Error 2
> ==> ERROR: A failure occurred in build().

I have that, too.  Bisecting results in this commit made by Stefan (in Cc).

--8<---------------cut here---------------start------------->8---
801eda8a2a00b3f28a69ffe51b05a649fffc5c58 is the first bad commit
commit 801eda8a2a00b3f28a69ffe51b05a649fffc5c58
Author: Stefan Monnier <monnier@iro.umontreal.ca>
Date:   Mon Mar 16 16:11:38 2015 -0400

    * lisp/emacs-lisp/cl-macs.el (cl--transform-lambda): Optimize &aux.
    
    Rework to avoid cl--do-arglist in more cases; add comments to explain what's
    going on.
    (cl--do-&aux): New function extracted from cl--do-arglist.
    (cl--do-arglist): Use it.
    * lisp/emacs-lisp/cl-generic.el: Add Version: header, for ELPA purposes.

:040000 040000 f73912afa1b052c7d6957b819d7e5ee803f8855b 5bcfa670c6f4a4b0a52ccafaa9f01df4264e9657 M	lisp
:040000 040000 0355fb5b6c0ed6f83276f03b0f2e6dd808420f24 53cd3b8db8869877edd27e110d4127b69ef52372 M	test
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Bye,
Tassilo