From owner-freebsd-bugs  Tue Dec 29 05:40:10 1998
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id FAA00963
          for freebsd-bugs-outgoing; Tue, 29 Dec 1998 05:40:10 -0800 (PST)
          (envelope-from owner-freebsd-bugs@FreeBSD.ORG)
Received: from freefall.freebsd.org (freefall.FreeBSD.ORG [204.216.27.21])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id FAA00955
          for <freebsd-bugs@FreeBSD.org>; Tue, 29 Dec 1998 05:40:09 -0800 (PST)
          (envelope-from gnats@FreeBSD.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.8.8/8.8.5) id FAA26064;
	Tue, 29 Dec 1998 05:40:00 -0800 (PST)
Received: (from nobody@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id FAA00418;
          Tue, 29 Dec 1998 05:36:01 -0800 (PST)
          (envelope-from nobody)
Message-Id: <199812291336.FAA00418@hub.freebsd.org>
Date: Tue, 29 Dec 1998 05:36:01 -0800 (PST)
From: schmr000@mail.uni-mainz.de
To: freebsd-gnats-submit@FreeBSD.ORG
X-Send-Pr-Version: www-1.0
Subject: bin/9233: gmp's mpq_add and mpq_sub are buggy
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org


>Number:         9233
>Category:       bin
>Synopsis:       gmp's mpq_add and mpq_sub are buggy
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec 29 05:40:00 PST 1998
>Last-Modified:
>Originator:     Ralf Schmitt
>Organization:
>Release:        3.0
>Environment:
FreeBSD myname.my.domain 3.0-RELEASE FreeBSD 3.0-RELEASE #1: Tue Dec 22 
>Description:
A bug in mpq_add and mpq_sub makes them work unreliably due to 
references outside of allocated memory (quoted from the GNU MP web pages)
>How-To-Repeat:
Compile and run the following program:

#include <iostream.h>
#include <gmp.h>
 
void setRational(mpq_t &rat, const char *num, const char *den)
{
        mpz_t tmp;
        mpz_init(tmp);
        
        mpz_set_str(tmp, num, 10);
        mpq_set_num(rat, tmp);
        
        mpz_set_str(tmp, den, 10);
        mpq_set_den(rat, tmp);
        
        
        mpz_clear(tmp);
}
 
void test()
{
        mpq_t r1,r2, result;
 
        mpq_init(r1);
        mpq_init(r2);
        mpq_init(result);
 
 
        setRational(r1,"1999999999999999999","10000000000000000000000000000000000");
        setRational(r2, "-1","100000000");
 
        cout << "Calling mpq_sub" << endl;
        mpq_sub(result, r1, r2);
        
}
 
int main()
{
        test();
}

>Fix:
Apply the diffs from the GNU MP web pages:
http://www.matematik.su.se/~tege/gmp
>Audit-Trail:
>Unformatted:

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message