Build errors on xenial launchpad buildbots

[Yuya Nishihara]

On Thu, 19 May 2016 15:34:35 +0900, FUJIWARA Katsunori wrote:
> At Wed, 18 May 2016 12:46:42 -0700,
> Sean Farley wrote:
> > 
> > It seems after 9d38a2061fd8 (patch: show lower-ed translated message
> > correctly) I'm getting the following error below. I don't know the
> > launchpad builders so any help here is appreciated!
> > 
> > 
> > cd tests && python run-tests.py -j4
> > sss...s.....ss..ss.s..sss.s..s...s........s.ss
> > --- /«BUILDDIR»/mercurial-3.8.2+121-xenial/tests/test-commit-interactive.t
> > +++ /«BUILDDIR»/mercurial-3.8.2+121-xenial/tests/test-commit-interactive.t.err
> > @@ -899,7 +899,7 @@  
> >    > ?
> >    > q
> >    > EOF  
> > -  y - \x82\xb1\x82\xcc\x95\xcf\x8dX\x82\xf0\x8bL\x98^(yes) (esc)
> > +  Binary file (standard input) matches
> >  
> >    $ LANGUAGE=
> >  #endif
> > 
> > ERROR: test-commit-interactive.t output changed
> >   
> 
> It seems a message of "grep" command, which is used to pick up help
> line for "yes" command. It might be locale sensitive (run-tests.py
> explicitly sets LC_ALL and LANG to C).

FYI, recent versions of GNU grep assume files are encoded in LC_CTYPE, which
is really annoying.

http://debbugs.gnu.org/cgi/bugreport.cgi?bug=19230

And the encoding bits should be disabled by switching to C locale as C locale
should be neutral, but GNU grep v2.24 had a bug, which is unfortunately shipped
with Ubuntu xenial.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=800670
http://packages.ubuntu.com/xenial/grep