diff --git a/extension/intdiv.c b/extension/intdiv.c
index 529ea36..95bb3c1 100644
--- a/extension/intdiv.c
+++ b/extension/intdiv.c
@@ -65,14 +65,18 @@ mpz_conv(const awk_value_t *arg, mpz_ptr tmp)
 {
 	switch (arg->num_type) {
 	case AWK_NUMBER_TYPE_MPZ:
+		fputs("converting mpz no-op\n", stderr);
+		gmp_printf("argument is %Zd\n", arg->num_ptr);
 		return arg->num_ptr;
 	case AWK_NUMBER_TYPE_MPFR:
+		fputs("converting mpfr\n", stderr);
 		if (! mpfr_number_p(arg->num_ptr))
 			return NULL;
 		mpz_init(tmp);
 		mpfr_get_z(tmp, arg->num_ptr, MPFR_RNDZ);
 		return tmp;
 	case AWK_NUMBER_TYPE_DOUBLE:	/* can this happen? */
+		fputs("converting double\n", stderr);
 		mpz_init(tmp);
 		mpz_set_d(tmp, double_to_int(arg->num_value));
 		return tmp;
@@ -183,6 +187,7 @@ do_intdiv(int nargs, awk_value_t *result, struct awk_ext_func *unused)
 
 		/* do the division */
 		mpz_tdiv_qr(quotient, remainder, numer, denom);
+		gmp_printf("quotient is %Zd\n", quotient);
 
 		array_set_mpz(array, "quotient", 8, quotient);
 		array_set_mpz(array, "remainder", 9, remainder);