From a7746c81538d9bc9299fc045d921950875908100 Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Fri, 6 Oct 2017 21:32:33 +0200
Subject: [PATCH] add assertion to be more defensive against buffer overflow
 (cannot happen, but this better protects against future changes)

---
 src/exchange-lib/exchange_api_refresh_link.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/exchange-lib/exchange_api_refresh_link.c b/src/exchange-lib/exchange_api_refresh_link.c
index ca556688d..5b7f68674 100644
--- a/src/exchange-lib/exchange_api_refresh_link.c
+++ b/src/exchange-lib/exchange_api_refresh_link.c
@@ -282,6 +282,7 @@ parse_refresh_link_ok (struct TALER_EXCHANGE_RefreshLinkHandle *rlh,
     }
 
     /* clean up */
+    GNUNET_assert (off_coin <= num_coins);
     for (i=0;i<off_coin;i++)
     {
       if (NULL != sigs[i].rsa_signature)