bug#26274: 26.0.50; completion regression

[Stephen Berman]

On Mon, 27 Mar 2017 18:22:29 +0200 Stephen Berman <stephen.berman@gmx.net> 
wrote:

> On Mon, 27 Mar 2017 12:56:19 +0200 Stephen Berman <stephen.berman@gmx.net> 
> wrote:
>
>> Substring completion involving non-ascii characters (with or without
>> case-folding) does not work in current master as it had till recently
>> and still does in Emacs 25.2 (my most recent build from master is from
>                                     
> Oops: s/most recent/oldest/
>
>> March 15 and it also shows the problem).  To reproduce:

This is commit a3207a383009720bbd89327425e0eb1c9c20c267.  I have now
found an older build from master from February 8, commit
e3b659630843de7e459bce483c278af765c644f7, which does not have this
completion problem.  However, when I run git bisect on these commits and
then make, it fails as follows:

steve@rosalinde:/data/steve/git/emacs-master> make
cd . && ./autogen.sh autoconf
Checking whether you have the necessary tools...
(Read INSTALL.REPO for more details on building Emacs)
Checking for autoconf (need at least version 2.65) ... ok
Checking for automake (need at least version 1.11) ... ok
Your system has the required tools.
Running 'autoreconf -fi -I m4' ...
/usr/bin/m4:aclocal.m4:9: cannot open `m4/count-leading-zeros.m4': No such file 
or directory
autom4te: /usr/bin/m4 failed with exit status: 1
/usr/bin/m4:aclocal.m4:9: cannot open `m4/count-leading-zeros.m4': No such file 
or directory
autom4te: /usr/bin/m4 failed with exit status: 1
autoreconf: /usr/bin/autoconf failed with exit status: 1
Makefile:450: recipe for target 'configure' failed
make: *** [configure] Error 1

This continues to happen when I repeatedly call `git bisect skip'.  Is
there anything I can do to proceed with the bisection?

Steve Berman