Strange reader bug (string->number)

Strange reader bug (string->number)

[Kjetil S. Matheussen]

The following bug causes some problems
with Snd: (At least the realtime extension of Snd)


*****************************
$ echo "'(4194304 262144 1.0f)" >test.scm
$ guile -l test.scm
Backtrace:
In unknown file:
    ?: 0* [primitive-load "test.scm"]

<unnamed port>: In procedure string->number in expression (primitive-load name):
<unnamed port>: Value out of range: 444
$ 
*****************************


* Tested with Guile 1.8.6 and 1.8.0. Same behaviour for both.

* It only happens when using "guile -f <filename>" from the
   command line or evaluating (load <filename>) in the REPL.

* Evaluating '(4194304 262144 1.0f) in the REPL causes no error.

* Examples of lists not causing an error:

'(4194304 262144 1.0)
'(262144 1.0f)
'(4194304 1.0f)
'(1 2 3.0f)

Bug reporting system (Re: Strange reader bug (string->number))

[Kjetil S. Matheussen]

On Sun, 2 Aug 2009, Kjetil S. Matheussen wrote:

>
>
> The following bug causes some problems
> with Snd: (At least the realtime extension of Snd)
>

I have tried to add this bug to the bug reporting system at
https://savannah.gnu.org/bugs/?group=guile#top
but I can't find out how to submit a new bug...?

Shouldn't there some kind of "submit new bug" button
somewhere?

Also, it would be nice if you added a link to the
bug tracker from Guile's homepage. It was hard to find.

Re: Bug reporting system (Re: Strange reader bug (string->number))

[Marijn Schouten (hkBst)]

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Hash: SHA1

Kjetil S. Matheussen wrote:
> 
> 
> On Sun, 2 Aug 2009, Kjetil S. Matheussen wrote:
> 
>>
>>
>> The following bug causes some problems
>> with Snd: (At least the realtime extension of Snd)
>>
> 
> I have tried to add this bug to the bug reporting system at
> https://savannah.gnu.org/bugs/?group=guile#top
> but I can't find out how to submit a new bug...?
> 
> Shouldn't there some kind of "submit new bug" button
> somewhere?
> 

Under Bugs, you can Submit.

Marijn


- --
If you cannot read my mind, then listen to what I say.

Marijn Schouten (hkBst), Gentoo Lisp project, Gentoo ML
<http://www.gentoo.org/proj/en/lisp/>, #gentoo-{lisp,ml} on FreeNode
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Re: Bug reporting system (Re: Strange reader bug (string->number))

[Kjetil S. Matheussen]

On Mon, 3 Aug 2009, Marijn Schouten (hkBst) wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Kjetil S. Matheussen wrote:
>>
>>
>> On Sun, 2 Aug 2009, Kjetil S. Matheussen wrote:
>>
>>>
>>>
>>> The following bug causes some problems
>>> with Snd: (At least the realtime extension of Snd)
>>>
>>
>> I have tried to add this bug to the bug reporting system at
>> https://savannah.gnu.org/bugs/?group=guile#top
>> but I can't find out how to submit a new bug...?
>>
>> Shouldn't there some kind of "submit new bug" button
>> somewhere?
>>
>
> Under Bugs, you can Submit.
>

Thanks, didn't see that. And I _did_ try very hard
to find it! :-)

Re: Strange reader bug (string->number)

[Andy Wingo]

Hi Kjetil,

On Sun 02 Aug 2009 15:26, "Kjetil S. Matheussen" <k.s.matheussen@notam02.no> writes:

> The following bug causes some problems
> with Snd: (At least the realtime extension of Snd)
>
>
> *****************************
> $ echo "'(4194304 262144 1.0f)" >test.scm
> $ guile -l test.scm

Fixed in 1.9, and backported to 1.8. Thanks for the report!

commit ee0ddd21211757664092eaec631c4c76f4aae74f
Author: Andy Wingo <wingo@pobox.com>
Date:   Tue Aug 4 20:29:09 2009 +0200

    fix buffer overrun reading partial numbers: 1.0f, 1.0/, and 1.0+
    
    * libguile/numbers.c (mem2decimal_from_point, mem2ureal, mem2complex):
      Fix a number of cases where, for invalid numbers, we could read past
      the end of the buffer. This happened in e.g. "1.0+", "1/" and "1.0f".
      But I couldn't figure out how to test for these, given that the
      behavior depended on the contents of uninitialized memory in the
      reader buffer. We'll just have to be happy with this.
    
    Thanks to Kjetil S. Matheussen for the report.

Andy
-- 
http://wingolog.org/

Re: Strange reader bug (string->number)

[Kjetil S. Matheussen]

On Tue, 4 Aug 2009, Andy Wingo wrote:

> Hi Kjetil,
>
> On Sun 02 Aug 2009 15:26, "Kjetil S. Matheussen" <k.s.matheussen@notam02.no> writes:
>
>> The following bug causes some problems
>> with Snd: (At least the realtime extension of Snd)
>>
>>
>> *****************************
>> $ echo "'(4194304 262144 1.0f)" >test.scm
>> $ guile -l test.scm
>
> Fixed in 1.9, and backported to 1.8. Thanks for the report!
>

Wow, that was quick. :-) Thanks!