bug#26274: 26.0.50; completion regression

[Eli Zaretskii]

> From: Stephen Berman <stephen.berman@gmx.net>
> Date: Wed, 29 Mar 2017 19:00:30 +0200
> 
> >> 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.

If so, then please see if the problematic commits are one or more of
these:

  commit 9f9863e50298a3506165cc1f056ab3238f37cb9f
  Author:     Michal Nazarewicz <mina86@mina86.com>
  AuthorDate: Fri Feb 17 16:36:44 2017 +0100

      Fix build failure caused by `Generate upcase and downcase tables from 
Unicod

  commit 6220faeb4e9be16b9dec728e72ea8dff2cfe35ba
  Author:     Michal Nazarewicz <mina86@mina86.com>
  AuthorDate: Wed Sep 7 21:00:57 2016 +0200

      casing: don't assume letters are *either* upper- or lower-case  
(bug#24603)

  commit 5ec3a58462e99533ea5200de356302181d634d0b
  Author:     Michal Nazarewicz <mina86@mina86.com>
  AuthorDate: Mon Sep 19 00:23:40 2016 +0200

      Generate upcase and downcase tables from Unicode data  (bug#24603)