[PATCH v4] Ensure mktime sets errno on error (bug 23789)

[Albert ARIBAUD]

Hi Paul,

On Tue, 6 Nov 2018 06:43:06 +0100, Albert ARIBAUD
<albert.aribaud@3adev.fr> wrote :

> Hi Paul,
> 
> On Sun, 4 Nov 2018 23:54:59 -0800, Paul Eggert <eggert@cs.ucla.edu>
> wrote :
> 
> > Paul Eggert wrote:  
> > > 3. Please construct a third patch containing your mktime test case for glibc, 
> > > and we then apply that patch to glibc.    
> > 
> > I looked at that test case and found some issues with it, e.g., it assumed a 
> > particular time_t width in some cases and assumed a particular error number in 
> > others. Attached is a revised test case that should fix the issues. For 
> > convenience I'm also attaching the same glibc code patch again.  
> 
> Apparently, with both your patches applied there are still paths which
> yield "mktime failed without setting errno" when make check is run for
> i686-linux-gnu. I'll go through the call path and see where it fails. 

Issue is that __mktime_internal exited through

    else if (--remaining_probes == 0)
      return -1;

with errno never set.

Any idea why?

Cordialement,
Albert ARIBAUD
3ADEV