Bug#256405: crash displaying main menu in arabic

[Alastair McKinstry <mckinstry@computer.org>]

Dé Domh, 2004-06-27 ag 11:29 -0500, scríobh Steve Langasek:
> On Sat, Jun 26, 2004 at 04:35:42PM -0400, Joey Hess wrote:
> > Package: debian-installer
> > Severity: normal
> > Tags: d-i
> 
> > I booted today's sid_d-i build from a usb stick. At the language
> > chooser, I chose the nice new Arabic choice, and then at countrychooser,
> > it was at the full list of contries, and I realized I din't speak
> > Arabic, and selected the back button.

> > Some experimentation and it looks like the problem is just with showing
> > the current d-i main menu, localised to Arabic. I can reproduce the same
> > problem by booting in expert mode, selecting Arabic, and pressing enter;
> > when it tries to draw the main menu (same as it does when you go back
> > from countrychooser), it must not like something, and it crashes.

I suspect that the arabic shaping code is re-writing the strings and
using characters 
that were not present in the original string. iso-scan saves space by
removing all
glyphs from unifont.bgf that were not present in the original string; if
the code
assumes all glyphs are present, it could crash ...

- Alastair