[debbugs-tracker] bug#15100: closed (Division by zero in bytevector->uint-list)

[GNU bug Tracking System]

Your message dated Fri, 16 Aug 2013 23:19:15 -0400
with message-id <address@hidden>
and subject line Re: bug#15100: Division by zero in bytevector->uint-list
has caused the debbugs.gnu.org bug report #15100,
regarding Division by zero in bytevector->uint-list
to be marked as done.

(If you believe you have received this mail in error, please contact
address@hidden)


-- 
15100: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=15100
GNU Bug Tracking System
Contact address@hidden with problems

--- Begin Message --- Subject: Division by zero in bytevector->uint-list Date: Thu, 15 Aug 2013 13:02:16 +0200 User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.4 (gnu/linux)

Hello schemers,

the bytevector->uint-list procedure from (rnrs) can crash Guile through
a division by zero:

scheme@(guile-user)> (import (rnrs))
scheme@(guile-user)> (bytevector->uint-list #vu8(0) 'x 0)
Floating point exception

The same happens with bytevector->sint-list. These procedures also do
not check that the length of the bytevector is divisible by the size.

Tested with GNU Guile 2.0.9.71-8d5d04.

Regards,

-- 
Göran Weinholt <address@hidden>
"What's worse than clowns? Danish clowns."
  -- Mystery Science Theatre 3000

pgp3npmVuxi_t.pgp
Description: PGP signature

--- End Message ---

> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#15100: Division by zero in bytevector->uint-list
>
>
>
>
> Date: 
>
> Fri, 16 Aug 2013 23:19:15 -0400
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux)
>
>
>
>
> Göran Weinholt <address@hidden> writes:
>
> > the bytevector->uint-list procedure from (rnrs) can crash Guile through
> > a division by zero:
> >
> > scheme@(guile-user)> (import (rnrs))
> > scheme@(guile-user)> (bytevector->uint-list #vu8(0) 'x 0)
> > Floating point exception
> >
> > The same happens with bytevector->sint-list.
>
> Fixed in 088cfb7d761b01a2620d78f10e8dbcaa07485a32.
>
> > These procedures also do not check that the length of the bytevector
> > is divisible by the size.
>
> I don't think we can fix this in stable-2.0, because some existing code
> might depend on our current permissive behavior.  However, I fixed it on
> the master branch in c099201da1de71652b9791fb0a3a863b6d3c355d.
>
>     Thanks!
>       Mark
>
>
> --- End Message ---