Extraneous newline emitted between error messages in GCC 6

[David Malcolm]

On Mon, 2015-12-21 at 19:20 +0100, Marek Polacek wrote:
> On Mon, Dec 21, 2015 at 01:12:33PM -0500, Patrick Palka wrote:
> > GCC 6, compared to GCC 5, now emits an extra newline between error
> > messages.  Is this intended?
> > 
> > $ cat error.c
> > int x = a;
> > int y = b;
> > $ gcc-5 error.c
> > error.c:1:9: error: ‘a’ undeclared here (not in a function)
> >  int x = a;
> >          ^
> > error.c:2:9: error: ‘b’ undeclared here (not in a function)
> >  int y = b;
> >          ^
> > $ gcc-6 error.c
> > error.c:1:9: error: ‘a’ undeclared here (not in a function)
> >  int x = a;
> >          ^
> > 
> > error.c:2:9: error: ‘b’ undeclared here (not in a function)
> >  int y = b;
> >          ^
> > 
> > $
> 
> Started with r229884: Reimplement diagnostic_show_locus, introducing
> rich_location classes.  I think it is a bug and should be fixed.

I agree.  Sorry, my bad.  I've filed this as PR other/69006, and I'm
investigating it.

Dave