Bug#818476: libgmp10: GMP is limited to 32-bit size on a 64-bit machine: failure in mpz_realloc2

[Vincent Lefevre]

Package: libgmp10
Version: 2:6.1.0+dfsg-2
Severity: normal
Tags: upstream

Consider:

#include <stdio.h>
#include <gmp.h>

int main (void)
{
  mpz_t u;
  int i;

  mpz_init (u);
  for (i = 30; i <= 40; i++)
    {
      printf ("i = %d\n", i);
      mpz_realloc2 (u, 1UL << i);
    }
  mpz_clear (u);

  return 0;
}

cventin:~> gcc tst.c -o tst -lgmp
cventin:~> ./tst
i = 30
i = 31
i = 32
i = 33
i = 34
i = 35
i = 36
i = 37
gmp: overflow in mpz type

Not sure whether this has now been fixed upstream, but a discussion
suggests that LP64 like here is fine, so that there shouldn't be
such a limit.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.4.0-1-amd64 (SMP w/12 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libgmp10:amd64 depends on:
ii  libc6  2.22-3

libgmp10:amd64 recommends no packages.

libgmp10:amd64 suggests no packages.

-- no debconf information