From f74fc9b22d7f39e36d0cbf80f5c06958c516c8ec Mon Sep 17 00:00:00 2001
From: Mark Friedenbach <mark@monetize.io>
Date: Fri, 21 Mar 2014 12:27:44 -0700
Subject: [PATCH] Print input index when signature validation fails, to aid
 debugging.

---
 src/main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index c1fabdd55..7bb61f251 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1317,7 +1317,7 @@ void UpdateCoins(const CTransaction& tx, CValidationState &state, CCoinsViewCach
 bool CScriptCheck::operator()() const {
     const CScript &scriptSig = ptxTo->vin[nIn].scriptSig;
     if (!VerifyScript(scriptSig, scriptPubKey, *ptxTo, nIn, nFlags))
-        return error("CScriptCheck() : %s VerifySignature failed", ptxTo->GetHash().ToString());
+        return error("CScriptCheck() : %s:%d VerifySignature failed", ptxTo->GetHash().ToString(), nIn);
     return true;
 }