bug#21982: 25.1.50; Building emacs-25 branch fails

[Eli Zaretskii]

> From: Michael Heerdegen <michael_heerdegen@web.de>
> Cc: 21982@debbugs.gnu.org
> Date: Wed, 25 Nov 2015 18:58:58 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > I don't see how this could be relevant.  In particular, this commit
> > doesn't touch version.el.  How could it cause a change in version.el?
> > What am I missing?
> 
> Good question.  I tried to recompile with some changes related to these
> commits to find an answer.  Compiling never failed.  And now, even
> compiling the emacs-25 branch doesn't fail.  AFAICT, the repository is
> in the same state as yesterday, with the same head commit.
> Yesterday, it failed to compile, now it doesn't.

Heisenbugs, sigh...