[tex-k] Re: Metafont bug located

Julian Gilbey J.D.Gilbey@qmw.ac.uk
Fri, 26 Jan 2001 15:29:55 +0000

On Fri, Jan 26, 2001 at 01:35:41AM +0000, Julian Gilbey wrote:
> On Mon, Jan 22, 2001 at 02:47:50PM +0000, Julian Gilbey wrote:
> > Wow!  I got a MetaFont "This can't happen (m)" error.  Here's how I
> > did it.
> > [...]

The following is a partial patch to fix this bug.  I have applied it
to the change file, not to the WEB file itself.  At the moment, it
only examines the x-coordinates, not yet the y-coordinates.  It is not
fully tested or rigorously justified.  It's not particularly clean,
either.  However, Metafont still passes the trap test and produces
identical output on the cmr10 font (comparing log files with
loggingall; selected) when compiled with the patch.  It also no longer
dies with break.mf or the xslhz20.mf in ljfzzz mode, as originally



         Julian Gilbey, Dept of Maths, Queen Mary, Univ. of London
       Debian GNU/Linux Developer,  see http://people.debian.org/~jdg
  Donate free food to the world's hungry: see http://www.thehungersite.com/