From 561e42590307efd3f279e903e599f3894080a4df Mon Sep 17 00:00:00 2001
From: Damien George
Date: Mon, 12 May 2014 23:27:29 +0100
Subject: py: Fix bug in mpz_and function.

Addresses issue #610.
---
 py/mpz.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'py')

diff --git a/py/mpz.c b/py/mpz.c
index 8eed283f0..25c32e9a4 100644
--- a/py/mpz.c
+++ b/py/mpz.c
@@ -213,8 +213,8 @@ STATIC uint mpn_and(mpz_dig_t *idig, const mpz_dig_t *jdig, uint jlen, const mpz
         *idig = *jdig & *kdig;
     }
 
-    for (; jlen > 0; --jlen, ++idig) {
-        *idig = 0;
+    // remove trailing zeros
+    for (; idig > oidig && *idig == 0; --idig) {
     }
 
     return idig - oidig;
-- 
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