Mercurial is a Python program. While building Sage's Python the interpreter 
might be in a bad shape, or we inject libraries via LD_LIBRARY_PATH into 
the system interpreter that break it.

On Thursday, February 27, 2014 11:37:37 PM UTC+1, François wrote:
>
> It is all a bit of a mystery. Why is the system python building? Why is 
> sage's 
> one not? Why did it stop working when upgrading? Why moving to hg-2.5 
> solve 
> the problem? 
>
> Francois 
>
> On Thu, 27 Feb 2014 14:31:12 strogdon wrote: 
> > So with mercurial-2.5.4 installed python-2.7.5.p2 will build. So perhaps 
> > the version I had installed (2.4.2) is buggy? But it was this 2.4.2 
> version 
> > that was present when python-2.7.5.p1 built without a problem? Hmm. Just 
> to 
> > make sure, before I did this, I rebuilt mercurial-2.4.2 and 
> python-2.7.5.p2 
> > still failed. 
> > 
> > On Thursday, February 27, 2014 3:51:42 PM UTC-6, François wrote: 
> > > Can you update to 2.5.4 at least? If that works I wonder what is done 
> on 
> > > Gentoo to avoid the problem. Could there be something in ~/.hgrc or 
> > > ~/.sage 
> > > that triggers this? 
> > > 
> > > Francois 
> > > 
> > > On Thu, 27 Feb 2014 13:19:24 strogdon wrote: 
> > > > # eix dev-vcs/mercurial 
> > > > [I] dev-vcs/mercurial 
> > > > 
> > > >      Available versions:  2.4.2 ~2.5.4 ~2.6.3 ~2.7.2 ~2.8.2 ~2.9 
> **9999 
> > > > 
> > > > {bugzilla emacs gpg test tk zsh-completion PYTHON_TARGETS="python2_6 
> > > > python2_7"} 
> > > > 
> > > >      Installed versions:  2.4.2(10:03:49 AM 02/12/2013)(bugzilla tk 
> > > 
> > > -emacs 
> > > 
> > > > -gpg -test -zsh-completion) 
> > > > 
> > > > I didn't remove the tinfo patch and rebuild Sage, but I did patch my 
> > > 
> > > Gentoo 
> > > 
> > > > python with it and python built just fine. I suspect it is somewhere 
> > > 
> > > else, 
> > > 
> > > > unless Gentoo is doing something very, very tricky? 
> > > > 
> > > > On Thursday, February 27, 2014 3:13:28 PM UTC-6, François wrote: 
> > > > > On Fri, 28 Feb 2014 10:10:45 François Bissey wrote: 
> > > > > > On Thu, 27 Feb 2014 11:44:30 strogdon wrote: 
> > > > > > > After looking at ticket 15317 I see that could be a 
> possibility. 
> > > 
> > > From 
> > > 
> > > > >  the 
> > > > >   
> > > > > > > sage shell 
> > > > > > > 
> > > > > > > (sage-sh) strogdon@ledaig:sage$ which hg 
> > > > > > > /usr/bin/hg 
> > > > > > > 
> > > > > > > So, why now? And must I now remove it from my PATH? 
> > > > > > 
> > > > > > Experiment for the brave: Delete 
> > > > > > build/pkgs/python/patches/tinfo.patch 
> > > > > > and try rebuilding python. 
> > > > > 
> > > > > And because I built 6.2.beta2 from scratch without an hitch: 
> > > > > Output of 
> > > > > eix dev-vcs/mercurial 
> > > > > 
> > > > > Francois 
>
>

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