Re: [Bug-glpk] glpk prints warnings which lead to failing sagemath tests

[Andrew Makhorin]

On Mon, 2018-02-26 at 12:00 +0100, Sébastien Villemot wrote:
> Dear GLPK maintainer,
> 
> I received the attached bug report and patch for the glpk package in Debian.
> 
> What’s your take on this? Should I apply the patch, or is this something that
> should better be fixed at the sagemath level?
> 
> Best,
> 
> P.S.: please keep all addresses in CC when replying.

Thank you for your bug report.

Could you please explain in more details how glpk is tested? Both glpk
lp and mip solvers issue many messages to the standard output, so it is
unclear to me how some of the messages may affect the tests.

Andrew Makhorin



> 
> MHTML Document attachment (Bug#891465: glpk: prints warnings which
> lead to failing sagemath tests)
> > -------- Forwarded Message --------
> > From: Tobias Hansen <address@hidden>
> > Reply-to: Tobias Hansen <address@hidden>, address@hidden
> > To: address@hidden
> > Subject: Bug#891465: glpk: prints warnings which lead to failing
> > sagemath tests
> > Date: Sun, 25 Feb 2018 20:54:19 +0100
> > 
> > Source: glpk
> > Version: 4.65-1
> > Severity: normal
> > Tags: patch
> > 
> > Hi there,
> > 
> > since version 4.65 glpk started to frequently print the message "Long-step 
> > dual simplex will be used", leading to many failed tests for sagemath and 
> > sagemath failing to build. Not sure if it's a bug in glpk but it seems to 
> > me it shouldn't print this. Could you maybe deactivate the messages to 
> > allow sagemath to build?
> > 
> > Best,
> > Tobias