From f28d40ef0b58ef502ad39d7c953b50fc50430b5e Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Tue, 19 Sep 2017 10:25:01 +0200
Subject: [PATCH] Provide template for whiskers error.

---
 libdevcore/Whiskers.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/libdevcore/Whiskers.cpp b/libdevcore/Whiskers.cpp
index b0a4c755e..a6db35c8e 100644
--- a/libdevcore/Whiskers.cpp
+++ b/libdevcore/Whiskers.cpp
@@ -90,7 +90,13 @@ string Whiskers::replace(
 		string tagName(_match[1]);
 		if (!tagName.empty())
 		{
-			assertThrow(_parameters.count(tagName), WhiskersError, "Value for tag " + tagName + " not provided.");
+			assertThrow(
+				_parameters.count(tagName),
+				WhiskersError,
+				"Value for tag " + tagName + " not provided.\n" +
+				"Template:\n" +
+				_template
+			);
 			return _parameters.at(tagName);
 		}
 		else