From 4a617475ecc5d5a5821920de4f49871bd9ba99d4 Mon Sep 17 00:00:00 2001
From: syd <sydo@protonmail.com>
Date: Mon, 20 Nov 2017 19:26:34 -0500
Subject: [PATCH] Fix libsnark test failure.

The shorten() method was copying too much into the destination
buffer, overflowing it and affecting neighboring data.
---
 src/snark/src/algebra/fields/bigint.tcc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/snark/src/algebra/fields/bigint.tcc b/src/snark/src/algebra/fields/bigint.tcc
index f81addf45..c1777ad46 100644
--- a/src/snark/src/algebra/fields/bigint.tcc
+++ b/src/snark/src/algebra/fields/bigint.tcc
@@ -201,7 +201,7 @@ inline bigint<m> bigint<n>::shorten(const bigint<m>& q, const char *msg) const
         }
     }
     bigint<m> res;
-    mpn_copyi(res.data, data, n);
+    mpn_copyi(res.data, data, m);
     res.limit(q, msg);
     return res;
 }