#include <mpir.h>
#include <assert.h>

int main () {
  mpz_t a,b,d,u,v;
  mpz_init(a);
  mpz_init(b);
  mpz_init(d);
  mpz_init(u);
  mpz_init(v);
  mpz_set_si(a,1);
  mpz_set_si(b,2);
  mpz_gcdext(d,u,v,a,b);
  assert(!(u->_mp_size == 1 && u->_mp_d[0] == 0));
  assert(!(v->_mp_size == 1 && v->_mp_d[0] == 0));
  return 0;
}

produces an assertion failure with 1.3.0 but not with 1.2.1.  I
believe that could be a bug, because the integer 0 should have the
size set to 0, according to the documentation; in any case, our
(other) program doesn't work.  The OS is Mac OS X 10.6.

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