Problem with assignment operator

[William Garrett Mitchener]

Hi, I'm helping someone debug a gmp program, and we've come up with this 
minimal example:


----- bug.cc -----
#include <gmp.h>
#include <gmpxx.h>
#include <iostream>

using namespace std;

int
main(int, char**)
{
  mpz_class a, b;
  a = 9;
  b = -14;

  mpq_class c;
  c = mpq_class(a, b); // seg fault here

  cout << c << endl;
}
-----

We are running this on linux and have the same problem on Fedora 2 and 
Fedora 3.

We are compiling as follows:

g++ -g -Wall bug.cc -o bug -lgmpxx -lgmp

But when we run it, we get a segmentation fault on the line c = ...; On 
Fedora 3, we are using the packages: gmp-4.1.4-3 and gcc-3.4.2-6.fc3. On 
Fedora 3, we aren't able to get any information out of gdb.  It gives 
cryptic errors about

warning: Child process unexpectedly missing: No child process

and

Program terminated with signal ?, Unknown signal

The Fedora 3 machine is an IBM thinkpad T42 with a Pentium M.

On Fedora 2, we are using gmp-4.1.2-14 and gcc-3.3.3-7, and gdb is able to 
pinpoint the problem at:

Program received signal SIGSEGV, Segmentation fault.
__gmpn_copyi () at tmp-copyi.s:97
97      tmp-copyi.s: No such file or directory.
        in tmp-copyi.s

This machine is a house-build PC with two Pentium 4s:

argon{wgm}1126: uname -a
Linux argon 2.6.9-1.6_FC2smp #1 SMP Thu Nov 18 22:20:16 EST 2004 i686 i686 
i386 GNU/Linux

argon{wgm}1127: gcc -v
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.3.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man 
--infodir=/usr/share/info --enable-shared --enable-threads=posix 
--disable-checking --disable-libunwind-exceptions --with-system-zlib 
--enable-__cxa_atexit --host=i386-redhat-linux
Thread model: posix
gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7)


        Please help!
        Thanks,
        -- Garrett Mitchener